this actually works!

Cargo.toml

@@ -11,5 +11,6 @@ members = [
 exclude = [
     "embedded-examples/stm32f3-disco-rtic",
     "embedded-examples/stm32h7-rtic",
+    "serialization-prototyping",
 ]
 

satrs-example/Cargo.toml

@@ -27,6 +27,9 @@ serde_json = "1"
 path = "../satrs"
 features = ["test_util"]
 
+[dependencies.satrs-minisim]
+path = "../satrs-minisim"
+
 [dependencies.satrs-mib]
 version = "0.1.1"
 path = "../satrs-mib"

satrs-example/README.md

@@ -48,16 +48,17 @@ It is recommended to use a virtual environment to do this. To set up one in the
 you can use `python3 -m venv venv` on Unix systems or `py -m venv venv` on Windows systems.
 After doing this, you can check the [venv tutorial](https://docs.python.org/3/tutorial/venv.html)
 on how to activate the environment and then use the following command to install the required
-dependency:
+dependency interactively:
 
 ```sh
-pip install -r requirements.txt
+pip install -e .
 ```
 
 Alternatively, if you would like to use the GUI functionality provided by `tmtccmd`, you can also
 install it manually with
 
 ```sh
+pip install -e .
 pip install tmtccmd[gui]
 ```
 

satrs-example/pytmtc/.gitignore

@@ -1,3 +1,4 @@
+/tmtc_conf.json
 __pycache__
 
 /venv
@@ -7,3 +8,136 @@ __pycache__
 
 /seqcnt.txt
 /.tmtc-history.txt
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# PyCharm
+.idea

satrs-example/pytmtc/main.py

@@ -3,27 +3,17 @@
 import logging
 import sys
 import time
-from typing import Any, Optional
-from prompt_toolkit.history import History
-from prompt_toolkit.history import FileHistory
 
-from spacepackets.ccsds import PacketId, PacketType
 import tmtccmd
-from spacepackets.ecss import PusTelemetry, PusVerificator
+from spacepackets.ecss import PusVerificator
-from spacepackets.ecss.pus_17_test import Service17Tm
-from spacepackets.ecss.pus_1_verification import UnpackParams, Service1Tm
-from spacepackets.ccsds.time import CdsShortTimestamp
 
-from tmtccmd import TcHandlerBase, ProcedureParamsWrapper
+from tmtccmd import ProcedureParamsWrapper
 from tmtccmd.core.base import BackendRequest
 from tmtccmd.pus import VerificationWrapper
-from tmtccmd.tmtc import CcsdsTmHandler, GenericApidHandlerBase
+from tmtccmd.tmtc import CcsdsTmHandler
-from tmtccmd.com import ComInterface
 from tmtccmd.config import (
-    CmdTreeNode,
     default_json_path,
     SetupParams,
-    HookBase,
     params_to_procedure_conversion,
 )
 from tmtccmd.config import PreArgsParsingWrapper, SetupWrapper
@@ -33,193 +23,20 @@ from tmtccmd.logging.pus import (
     RawTmtcTimedLogWrapper,
     TimedLogWhen,
 )
-from tmtccmd.tmtc import (
+from spacepackets.seqcount import PusFileSeqCountProvider
-    TcQueueEntryType,
-    ProcedureWrapper,
-    TcProcedureType,
-    FeedWrapper,
-    SendCbParams,
-    DefaultPusQueueHelper,
-    QueueWrapper,
-)
-from spacepackets.seqcount import FileSeqCountProvider, PusFileSeqCountProvider
-from tmtccmd.util.obj_id import ObjectIdDictT
 
 
-import pus_tc
+from pytmtc.config import SatrsConfigHook
-from common import Apid, EventU32
+from pytmtc.pus_tc import TcHandler
+from pytmtc.pus_tm import PusHandler
 
 _LOGGER = logging.getLogger()
 
 
-class SatRsConfigHook(HookBase):
-    def __init__(self, json_cfg_path: str):
-        super().__init__(json_cfg_path=json_cfg_path)
-
-    def get_communication_interface(self, com_if_key: str) -> Optional[ComInterface]:
-        from tmtccmd.config.com import (
-            create_com_interface_default,
-            create_com_interface_cfg_default,
-        )
-
-        assert self.cfg_path is not None
-        packet_id_list = []
-        for apid in Apid:
-            packet_id_list.append(PacketId(PacketType.TM, True, apid))
-        cfg = create_com_interface_cfg_default(
-            com_if_key=com_if_key,
-            json_cfg_path=self.cfg_path,
-            space_packet_ids=packet_id_list,
-        )
-        assert cfg is not None
-        return create_com_interface_default(cfg)
-
-    def get_command_definitions(self) -> CmdTreeNode:
-        """This function should return the root node of the command definition tree."""
-        return pus_tc.create_cmd_definition_tree()
-
-    def get_cmd_history(self) -> Optional[History]:
-        """Optionlly return a history class for the past command paths which will be used
-        when prompting a command path from the user in CLI mode."""
-        return FileHistory(".tmtc-history.txt")
-
-    def get_object_ids(self) -> ObjectIdDictT:
-        from tmtccmd.config.objects import get_core_object_ids
-
-        return get_core_object_ids()
-
-
-class PusHandler(GenericApidHandlerBase):
-    def __init__(
-        self,
-        file_logger: logging.Logger,
-        verif_wrapper: VerificationWrapper,
-        raw_logger: RawTmtcTimedLogWrapper,
-    ):
-        super().__init__(None)
-        self.file_logger = file_logger
-        self.raw_logger = raw_logger
-        self.verif_wrapper = verif_wrapper
-
-    def handle_tm(self, apid: int, packet: bytes, _user_args: Any):
-        try:
-            pus_tm = PusTelemetry.unpack(
-                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
-            )
-        except ValueError as e:
-            _LOGGER.warning("Could not generate PUS TM object from raw data")
-            _LOGGER.warning(f"Raw Packet: [{packet.hex(sep=',')}], REPR: {packet!r}")
-            raise e
-        service = pus_tm.service
-        if service == 1:
-            tm_packet = Service1Tm.unpack(
-                data=packet, params=UnpackParams(CdsShortTimestamp.TIMESTAMP_SIZE, 1, 2)
-            )
-            res = self.verif_wrapper.add_tm(tm_packet)
-            if res is None:
-                _LOGGER.info(
-                    f"Received Verification TM[{tm_packet.service}, {tm_packet.subservice}] "
-                    f"with Request ID {tm_packet.tc_req_id.as_u32():#08x}"
-                )
-                _LOGGER.warning(
-                    f"No matching telecommand found for {tm_packet.tc_req_id}"
-                )
-            else:
-                self.verif_wrapper.log_to_console(tm_packet, res)
-                self.verif_wrapper.log_to_file(tm_packet, res)
-        elif service == 3:
-            _LOGGER.info("No handling for HK packets implemented")
-            _LOGGER.info(f"Raw packet: 0x[{packet.hex(sep=',')}]")
-            pus_tm = PusTelemetry.unpack(
-                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
-            )
-            if pus_tm.subservice == 25:
-                if len(pus_tm.source_data) < 8:
-                    raise ValueError("No addressable ID in HK packet")
-                json_str = pus_tm.source_data[8:]
-                _LOGGER.info(json_str)
-        elif service == 5:
-            tm_packet = PusTelemetry.unpack(
-                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
-            )
-            src_data = tm_packet.source_data
-            event_u32 = EventU32.unpack(src_data)
-            _LOGGER.info(
-                f"Received event packet. Source APID: {Apid(tm_packet.apid)!r}, Event: {event_u32}"
-            )
-            if event_u32.group_id == 0 and event_u32.unique_id == 0:
-                _LOGGER.info("Received test event")
-        elif service == 17:
-            tm_packet = Service17Tm.unpack(
-                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
-            )
-            if tm_packet.subservice == 2:
-                self.file_logger.info("Received Ping Reply TM[17,2]")
-                _LOGGER.info("Received Ping Reply TM[17,2]")
-            else:
-                self.file_logger.info(
-                    f"Received Test Packet with unknown subservice {tm_packet.subservice}"
-                )
-                _LOGGER.info(
-                    f"Received Test Packet with unknown subservice {tm_packet.subservice}"
-                )
-        else:
-            _LOGGER.info(
-                f"The service {service} is not implemented in Telemetry Factory"
-            )
-            tm_packet = PusTelemetry.unpack(
-                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
-            )
-        self.raw_logger.log_tm(pus_tm)
-
-
-class TcHandler(TcHandlerBase):
-    def __init__(
-        self,
-        seq_count_provider: FileSeqCountProvider,
-        verif_wrapper: VerificationWrapper,
-    ):
-        super(TcHandler, self).__init__()
-        self.seq_count_provider = seq_count_provider
-        self.verif_wrapper = verif_wrapper
-        self.queue_helper = DefaultPusQueueHelper(
-            queue_wrapper=QueueWrapper.empty(),
-            tc_sched_timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE,
-            seq_cnt_provider=seq_count_provider,
-            pus_verificator=self.verif_wrapper.pus_verificator,
-            default_pus_apid=None,
-        )
-
-    def send_cb(self, send_params: SendCbParams):
-        entry_helper = send_params.entry
-        if entry_helper.is_tc:
-            if entry_helper.entry_type == TcQueueEntryType.PUS_TC:
-                pus_tc_wrapper = entry_helper.to_pus_tc_entry()
-                raw_tc = pus_tc_wrapper.pus_tc.pack()
-                _LOGGER.info(f"Sending {pus_tc_wrapper.pus_tc}")
-                send_params.com_if.send(raw_tc)
-        elif entry_helper.entry_type == TcQueueEntryType.LOG:
-            log_entry = entry_helper.to_log_entry()
-            _LOGGER.info(log_entry.log_str)
-
-    def queue_finished_cb(self, info: ProcedureWrapper):
-        if info.proc_type == TcProcedureType.TREE_COMMANDING:
-            def_proc = info.to_tree_commanding_procedure()
-            _LOGGER.info(f"Queue handling finished for command {def_proc.cmd_path}")
-
-    def feed_cb(self, info: ProcedureWrapper, wrapper: FeedWrapper):
-        q = self.queue_helper
-        q.queue_wrapper = wrapper.queue_wrapper
-        if info.proc_type == TcProcedureType.TREE_COMMANDING:
-            def_proc = info.to_tree_commanding_procedure()
-            assert def_proc.cmd_path is not None
-            pus_tc.pack_pus_telecommands(q, def_proc.cmd_path)
-
-
 def main():
     add_colorlog_console_logger(_LOGGER)
     tmtccmd.init_printout(False)
-    hook_obj = SatRsConfigHook(json_cfg_path=default_json_path())
+    hook_obj = SatrsConfigHook(json_cfg_path=default_json_path())
     parser_wrapper = PreArgsParsingWrapper()
     parser_wrapper.create_default_parent_parser()
     parser_wrapper.create_default_parser()

satrs-example/pytmtc/pyproject.toml

@@ -0,0 +1,27 @@
+[build-system]
+requires = ["setuptools>=61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "pytmtc"
+description = "Python TMTC client for OPS-SAT"
+readme = "README.md"
+version = "0.1.0"
+requires-python = ">=3.8"
+authors = [
+  {name = "Robin Mueller", email = "robin.mueller.m@gmail.com"},
+]
+dependencies = [
+    "tmtccmd~=8.0",
+    "pydantic~=2.7"
+]
+
+[tool.setuptools.packages]
+find = {}
+
+[tool.ruff]
+extend-exclude = ["archive"]
+[tool.ruff.lint]
+ignore = ["E501"]
+[tool.ruff.lint.extend-per-file-ignores]
+"__init__.py" = ["F401"]

satrs-example/pytmtc/pytmtc/config.py

@@ -0,0 +1,47 @@
+from typing import Optional
+from prompt_toolkit.history import FileHistory, History
+from spacepackets.ccsds import PacketId, PacketType
+from tmtccmd import HookBase
+from tmtccmd.com import ComInterface
+from tmtccmd.config import CmdTreeNode
+from tmtccmd.util.obj_id import ObjectIdDictT
+
+from pytmtc.common import Apid
+from pytmtc.pus_tc import create_cmd_definition_tree
+
+
+class SatrsConfigHook(HookBase):
+    def __init__(self, json_cfg_path: str):
+        super().__init__(json_cfg_path=json_cfg_path)
+
+    def get_communication_interface(self, com_if_key: str) -> Optional[ComInterface]:
+        from tmtccmd.config.com import (
+            create_com_interface_default,
+            create_com_interface_cfg_default,
+        )
+
+        assert self.cfg_path is not None
+        packet_id_list = []
+        for apid in Apid:
+            packet_id_list.append(PacketId(PacketType.TM, True, apid))
+        cfg = create_com_interface_cfg_default(
+            com_if_key=com_if_key,
+            json_cfg_path=self.cfg_path,
+            space_packet_ids=packet_id_list,
+        )
+        assert cfg is not None
+        return create_com_interface_default(cfg)
+
+    def get_command_definitions(self) -> CmdTreeNode:
+        """This function should return the root node of the command definition tree."""
+        return create_cmd_definition_tree()
+
+    def get_cmd_history(self) -> Optional[History]:
+        """Optionlly return a history class for the past command paths which will be used
+        when prompting a command path from the user in CLI mode."""
+        return FileHistory(".tmtc-history.txt")
+
+    def get_object_ids(self) -> ObjectIdDictT:
+        from tmtccmd.config.objects import get_core_object_ids
+
+        return get_core_object_ids()

satrs-example/pytmtc/pytmtc/hk.py

@@ -0,0 +1,42 @@
+import logging
+import struct
+from spacepackets.ecss.pus_3_hk import Subservice
+from spacepackets.ecss import PusTm
+
+from pytmtc.common import AcsId, Apid
+from pytmtc.mgms import handle_mgm_hk_report
+
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def handle_hk_packet(pus_tm: PusTm):
+    if len(pus_tm.source_data) < 4:
+        raise ValueError("no unique ID in HK packet")
+    unique_id = struct.unpack("!I", pus_tm.source_data[:4])[0]
+    if (
+        pus_tm.subservice == Subservice.TM_HK_REPORT
+        or pus_tm.subservice == Subservice.TM_DIAGNOSTICS_REPORT
+    ):
+        if len(pus_tm.source_data) < 8:
+            raise ValueError("no set ID in HK packet")
+        set_id = struct.unpack("!I", pus_tm.source_data[4:8])[0]
+        handle_hk_report(pus_tm, unique_id, set_id)
+    _LOGGER.warning(
+        f"handling for HK packet with subservice {pus_tm.subservice} not implemented yet"
+    )
+
+
+def handle_hk_report(pus_tm: PusTm, unique_id: int, set_id: int):
+    hk_data = pus_tm.source_data[8:]
+    if pus_tm.apid == Apid.ACS:
+        if unique_id == AcsId.MGM_0:
+            handle_mgm_hk_report(pus_tm, set_id, hk_data)
+        else:
+            _LOGGER.warning(
+                f"handling for HK report with unique ID {unique_id} not implemented yet"
+            )
+    else:
+        _LOGGER.warning(
+            f"handling for HK report with apid {pus_tm.apid} not implemented yet"
+        )

satrs-example/pytmtc/pytmtc/hk_common.py

@@ -0,0 +1,16 @@
+import struct
+
+from spacepackets.ecss import PusService, PusTc
+from spacepackets.ecss.pus_3_hk import Subservice
+
+
+def create_request_one_shot_hk_cmd(apid: int, unique_id: int, set_id: int) -> PusTc:
+    app_data = bytearray()
+    app_data.extend(struct.pack("!I", unique_id))
+    app_data.extend(struct.pack("!I", set_id))
+    return PusTc(
+        service=PusService.S3_HOUSEKEEPING,
+        subservice=Subservice.TC_GENERATE_ONE_PARAMETER_REPORT,
+        apid=apid,
+        app_data=app_data,
+    )

satrs-example/pytmtc/pytmtc/mgms.py

@@ -0,0 +1,45 @@
+import logging
+import struct
+import enum
+from typing import List
+from spacepackets.ecss import PusTm
+from tmtccmd.tmtc import DefaultPusQueueHelper
+
+from pytmtc.common import AcsId, Apid
+from pytmtc.hk_common import create_request_one_shot_hk_cmd
+from pytmtc.mode import handle_set_mode_cmd
+
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class SetId(enum.IntEnum):
+    SENSOR_SET = 0
+
+
+def create_mgm_cmds(q: DefaultPusQueueHelper, cmd_path: List[str]):
+    assert len(cmd_path) >= 3
+    if cmd_path[2] == "hk":
+        if cmd_path[3] == "one_shot_hk":
+            q.add_log_cmd("Sending HK one shot request")
+            q.add_pus_tc(
+                create_request_one_shot_hk_cmd(Apid.ACS, AcsId.MGM_0, SetId.SENSOR_SET)
+            )
+
+    if cmd_path[2] == "mode":
+        if cmd_path[3] == "set_mode":
+            handle_set_mode_cmd(q, "MGM 0", cmd_path[4], Apid.ACS, AcsId.MGM_0)
+
+
+def handle_mgm_hk_report(pus_tm: PusTm, set_id: int, hk_data: bytes):
+    if set_id == SetId.SENSOR_SET:
+        if len(hk_data) != 13:
+            raise ValueError(f"invalid HK data length, expected 13, got {len(hk_data)}")
+        data_valid = hk_data[0]
+        mgm_x = struct.unpack("!f", hk_data[1:5])[0]
+        mgm_y = struct.unpack("!f", hk_data[5:9])[0]
+        mgm_z = struct.unpack("!f", hk_data[9:13])[0]
+        _LOGGER.info(
+            f"received MGM HK set in uT: Valid {data_valid} X {mgm_x} Y {mgm_y} Z {mgm_z}"
+        )
+        pass

satrs-example/pytmtc/pytmtc/mode.py

@@ -0,0 +1,31 @@
+import struct
+from spacepackets.ecss import PusTc
+from tmtccmd.pus.s200_fsfw_mode import Mode, Subservice
+from tmtccmd.tmtc import DefaultPusQueueHelper
+
+
+def create_set_mode_cmd(apid: int, unique_id: int, mode: int, submode: int) -> PusTc:
+    app_data = bytearray()
+    app_data.extend(struct.pack("!I", unique_id))
+    app_data.extend(struct.pack("!I", mode))
+    app_data.extend(struct.pack("!H", submode))
+    return PusTc(
+        service=200,
+        subservice=Subservice.TC_MODE_COMMAND,
+        apid=apid,
+        app_data=app_data,
+    )
+
+
+def handle_set_mode_cmd(
+    q: DefaultPusQueueHelper, target_str: str, mode_str: str, apid: int, unique_id: int
+):
+    if mode_str == "off":
+        q.add_log_cmd(f"Sending Mode OFF to {target_str}")
+        q.add_pus_tc(create_set_mode_cmd(apid, unique_id, Mode.OFF, 0))
+    elif mode_str == "on":
+        q.add_log_cmd(f"Sending Mode ON to {target_str}")
+        q.add_pus_tc(create_set_mode_cmd(apid, unique_id, Mode.ON, 0))
+    elif mode_str == "normal":
+        q.add_log_cmd(f"Sending Mode NORMAL to {target_str}")
+        q.add_pus_tc(create_set_mode_cmd(apid, unique_id, Mode.NORMAL, 0))

satrs-example/pytmtc/pytmtc/pus_tc.py

@@ -1,33 +1,69 @@
 import datetime
-import struct
 import logging
 
 from spacepackets.ccsds import CdsShortTimestamp
 from spacepackets.ecss import PusTelecommand
+from spacepackets.seqcount import FileSeqCountProvider
+from tmtccmd import ProcedureWrapper, TcHandlerBase
 from tmtccmd.config import CmdTreeNode
-from tmtccmd.pus.tc.s200_fsfw_mode import Mode
+from tmtccmd.pus import VerificationWrapper
-from tmtccmd.tmtc import DefaultPusQueueHelper
+from tmtccmd.tmtc import (
+    DefaultPusQueueHelper,
+    FeedWrapper,
+    QueueWrapper,
+    SendCbParams,
+    TcProcedureType,
+    TcQueueEntryType,
+)
 from tmtccmd.pus.s11_tc_sched import create_time_tagged_cmd
-from tmtccmd.pus.s200_fsfw_mode import Subservice as ModeSubservice
 
-from common import AcsId, Apid
+from pytmtc.common import Apid
+from pytmtc.mgms import create_mgm_cmds
 
 _LOGGER = logging.getLogger(__name__)
 
 
-def create_set_mode_cmd(
+class TcHandler(TcHandlerBase):
-    apid: int, unique_id: int, mode: int, submode: int
+    def __init__(
-) -> PusTelecommand:
+        self,
-    app_data = bytearray()
+        seq_count_provider: FileSeqCountProvider,
-    app_data.extend(struct.pack("!I", unique_id))
+        verif_wrapper: VerificationWrapper,
-    app_data.extend(struct.pack("!I", mode))
+    ):
-    app_data.extend(struct.pack("!H", submode))
+        super(TcHandler, self).__init__()
-    return PusTelecommand(
+        self.seq_count_provider = seq_count_provider
-        service=200,
+        self.verif_wrapper = verif_wrapper
-        subservice=ModeSubservice.TC_MODE_COMMAND,
+        self.queue_helper = DefaultPusQueueHelper(
-        apid=apid,
+            queue_wrapper=QueueWrapper.empty(),
-        app_data=app_data,
+            tc_sched_timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE,
-    )
+            seq_cnt_provider=seq_count_provider,
+            pus_verificator=self.verif_wrapper.pus_verificator,
+            default_pus_apid=None,
+        )
+
+    def send_cb(self, send_params: SendCbParams):
+        entry_helper = send_params.entry
+        if entry_helper.is_tc:
+            if entry_helper.entry_type == TcQueueEntryType.PUS_TC:
+                pus_tc_wrapper = entry_helper.to_pus_tc_entry()
+                raw_tc = pus_tc_wrapper.pus_tc.pack()
+                _LOGGER.info(f"Sending {pus_tc_wrapper.pus_tc}")
+                send_params.com_if.send(raw_tc)
+        elif entry_helper.entry_type == TcQueueEntryType.LOG:
+            log_entry = entry_helper.to_log_entry()
+            _LOGGER.info(log_entry.log_str)
+
+    def queue_finished_cb(self, info: ProcedureWrapper):
+        if info.proc_type == TcProcedureType.TREE_COMMANDING:
+            def_proc = info.to_tree_commanding_procedure()
+            _LOGGER.info(f"Queue handling finished for command {def_proc.cmd_path}")
+
+    def feed_cb(self, info: ProcedureWrapper, wrapper: FeedWrapper):
+        q = self.queue_helper
+        q.queue_wrapper = wrapper.queue_wrapper
+        if info.proc_type == TcProcedureType.TREE_COMMANDING:
+            def_proc = info.to_tree_commanding_procedure()
+            assert def_proc.cmd_path is not None
+            pack_pus_telecommands(q, def_proc.cmd_path)
 
 
 def create_cmd_definition_tree() -> CmdTreeNode:
@@ -112,32 +148,4 @@ def pack_pus_telecommands(q: DefaultPusQueueHelper, cmd_path: str):
     if cmd_path_list[0] == "acs":
         assert len(cmd_path_list) >= 2
         if cmd_path_list[1] == "mgms":
-            assert len(cmd_path_list) >= 3
+            create_mgm_cmds(q, cmd_path_list)
-            if cmd_path_list[2] == "hk":
-                if cmd_path_list[3] == "one_shot_hk":
-                    q.add_log_cmd("Sending HK one shot request")
-                    # TODO: Fix
-                    # q.add_pus_tc(
-                    #   create_request_one_hk_command(
-                    #    make_addressable_id(Apid.ACS, AcsId.MGM_SET)
-                    # )
-                    # )
-            if cmd_path_list[2] == "mode":
-                if cmd_path_list[3] == "set_mode":
-                    handle_set_mode_cmd(
-                        q, "MGM 0", cmd_path_list[4], Apid.ACS, AcsId.MGM_0
-                    )
-
-
-def handle_set_mode_cmd(
-    q: DefaultPusQueueHelper, target_str: str, mode_str: str, apid: int, unique_id: int
-):
-    if mode_str == "off":
-        q.add_log_cmd(f"Sending Mode OFF to {target_str}")
-        q.add_pus_tc(create_set_mode_cmd(apid, unique_id, Mode.OFF, 0))
-    elif mode_str == "on":
-        q.add_log_cmd(f"Sending Mode ON to {target_str}")
-        q.add_pus_tc(create_set_mode_cmd(apid, unique_id, Mode.ON, 0))
-    elif mode_str == "normal":
-        q.add_log_cmd(f"Sending Mode NORMAL to {target_str}")
-        q.add_pus_tc(create_set_mode_cmd(apid, unique_id, Mode.NORMAL, 0))

satrs-example/pytmtc/pytmtc/pus_tm.py

@@ -0,0 +1,93 @@
+import logging
+from typing import Any
+from spacepackets.ccsds.time import CdsShortTimestamp
+from spacepackets.ecss import PusTm
+from spacepackets.ecss.pus_17_test import Service17Tm
+from spacepackets.ecss.pus_1_verification import Service1Tm, UnpackParams
+from tmtccmd.logging.pus import RawTmtcTimedLogWrapper
+from tmtccmd.pus import VerificationWrapper
+from tmtccmd.tmtc import GenericApidHandlerBase
+
+from pytmtc.common import Apid, EventU32
+from pytmtc.hk import handle_hk_packet
+
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class PusHandler(GenericApidHandlerBase):
+    def __init__(
+        self,
+        file_logger: logging.Logger,
+        verif_wrapper: VerificationWrapper,
+        raw_logger: RawTmtcTimedLogWrapper,
+    ):
+        super().__init__(None)
+        self.file_logger = file_logger
+        self.raw_logger = raw_logger
+        self.verif_wrapper = verif_wrapper
+
+    def handle_tm(self, apid: int, packet: bytes, _user_args: Any):
+        try:
+            pus_tm = PusTm.unpack(
+                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
+            )
+        except ValueError as e:
+            _LOGGER.warning("Could not generate PUS TM object from raw data")
+            _LOGGER.warning(f"Raw Packet: [{packet.hex(sep=',')}], REPR: {packet!r}")
+            raise e
+        service = pus_tm.service
+        if service == 1:
+            tm_packet = Service1Tm.unpack(
+                data=packet, params=UnpackParams(CdsShortTimestamp.TIMESTAMP_SIZE, 1, 2)
+            )
+            res = self.verif_wrapper.add_tm(tm_packet)
+            if res is None:
+                _LOGGER.info(
+                    f"Received Verification TM[{tm_packet.service}, {tm_packet.subservice}] "
+                    f"with Request ID {tm_packet.tc_req_id.as_u32():#08x}"
+                )
+                _LOGGER.warning(
+                    f"No matching telecommand found for {tm_packet.tc_req_id}"
+                )
+            else:
+                self.verif_wrapper.log_to_console(tm_packet, res)
+                self.verif_wrapper.log_to_file(tm_packet, res)
+        elif service == 3:
+            pus_tm = PusTm.unpack(
+                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
+            )
+            handle_hk_packet(pus_tm)
+        elif service == 5:
+            tm_packet = PusTm.unpack(
+                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
+            )
+            src_data = tm_packet.source_data
+            event_u32 = EventU32.unpack(src_data)
+            _LOGGER.info(
+                f"Received event packet. Source APID: {Apid(tm_packet.apid)!r}, Event: {event_u32}"
+            )
+            if event_u32.group_id == 0 and event_u32.unique_id == 0:
+                _LOGGER.info("Received test event")
+        elif service == 17:
+            tm_packet = Service17Tm.unpack(
+                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
+            )
+            if tm_packet.subservice == 2:
+                self.file_logger.info("Received Ping Reply TM[17,2]")
+                _LOGGER.info("Received Ping Reply TM[17,2]")
+            else:
+                self.file_logger.info(
+                    f"Received Test Packet with unknown subservice {tm_packet.subservice}"
+                )
+                _LOGGER.info(
+                    f"Received Test Packet with unknown subservice {tm_packet.subservice}"
+                )
+        else:
+            _LOGGER.info(
+                f"The service {service} is not implemented in Telemetry Factory"
+            )
+            tm_packet = PusTm.unpack(
+                packet, timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE
+            )
+        self.raw_logger.log_tm(pus_tm)

satrs-example/pytmtc/requirements.txt

@@ -1,2 +1 @@
-tmtccmd == 8.0.0rc2
+.
-# -e git+https://github.com/robamu-org/tmtccmd@97e5e51101a08b21472b3ddecc2063359f7e307a#egg=tmtccmd

satrs-example/pytmtc/tc_definitions.py

@@ -1,38 +0,0 @@
-from tmtccmd.config import OpCodeEntry, TmtcDefinitionWrapper, CoreServiceList
-from tmtccmd.config.globals import get_default_tmtc_defs
-
-from common import HkOpCodes
-
-
-def tc_definitions() -> TmtcDefinitionWrapper:
-    defs = get_default_tmtc_defs()
-    srv_5 = OpCodeEntry()
-    srv_5.add("0", "Event Test")
-    defs.add_service(
-        name=CoreServiceList.SERVICE_5.value,
-        info="PUS Service 5 Event",
-        op_code_entry=srv_5,
-    )
-    srv_17 = OpCodeEntry()
-    srv_17.add("ping", "Ping Test")
-    srv_17.add("trigger_event", "Trigger Event")
-    defs.add_service(
-        name=CoreServiceList.SERVICE_17_ALT,
-        info="PUS Service 17 Test",
-        op_code_entry=srv_17,
-    )
-    srv_3 = OpCodeEntry()
-    srv_3.add(HkOpCodes.GENERATE_ONE_SHOT, "Generate AOCS one shot HK")
-    defs.add_service(
-        name=CoreServiceList.SERVICE_3,
-        info="PUS Service 3 Housekeeping",
-        op_code_entry=srv_3,
-    )
-    srv_11 = OpCodeEntry()
-    srv_11.add("0", "Scheduled TC Test")
-    defs.add_service(
-        name=CoreServiceList.SERVICE_11,
-        info="PUS Service 11 TC Scheduling",
-        op_code_entry=srv_11,
-    )
-    return defs

satrs-example/pytmtc/tests/test_tc_mods.py

@@ -0,0 +1,48 @@
+from unittest import TestCase
+
+from spacepackets.ccsds import CdsShortTimestamp
+from tmtccmd.tmtc import DefaultPusQueueHelper, QueueEntryHelper
+from tmtccmd.tmtc.queue import QueueWrapper
+
+from pytmtc.config import SatrsConfigHook
+from pytmtc.pus_tc import pack_pus_telecommands
+
+
+class TestTcModules(TestCase):
+    def setUp(self):
+        self.hook = SatrsConfigHook(json_cfg_path="tmtc_conf.json")
+        self.queue_helper = DefaultPusQueueHelper(
+            queue_wrapper=QueueWrapper.empty(),
+            tc_sched_timestamp_len=CdsShortTimestamp.TIMESTAMP_SIZE,
+            seq_cnt_provider=None,
+            pus_verificator=None,
+            default_pus_apid=None,
+        )
+
+    def test_cmd_tree_creation_works_without_errors(self):
+        cmd_defs = self.hook.get_command_definitions()
+        self.assertIsNotNone(cmd_defs)
+
+    def test_ping_cmd_generation(self):
+        pack_pus_telecommands(self.queue_helper, "/test/ping")
+        queue_entry = self.queue_helper.queue_wrapper.queue.popleft()
+        entry_helper = QueueEntryHelper(queue_entry)
+        log_queue = entry_helper.to_log_entry()
+        self.assertEqual(log_queue.log_str, "Sending PUS ping telecommand")
+        queue_entry = self.queue_helper.queue_wrapper.queue.popleft()
+        entry_helper.entry = queue_entry
+        pus_tc_entry = entry_helper.to_pus_tc_entry()
+        self.assertEqual(pus_tc_entry.pus_tc.service, 17)
+        self.assertEqual(pus_tc_entry.pus_tc.subservice, 1)
+
+    def test_event_trigger_generation(self):
+        pack_pus_telecommands(self.queue_helper, "/test/trigger_event")
+        queue_entry = self.queue_helper.queue_wrapper.queue.popleft()
+        entry_helper = QueueEntryHelper(queue_entry)
+        log_queue = entry_helper.to_log_entry()
+        self.assertEqual(log_queue.log_str, "Triggering test event")
+        queue_entry = self.queue_helper.queue_wrapper.queue.popleft()
+        entry_helper.entry = queue_entry
+        pus_tc_entry = entry_helper.to_pus_tc_entry()
+        self.assertEqual(pus_tc_entry.pus_tc.service, 17)
+        self.assertEqual(pus_tc_entry.pus_tc.subservice, 128)

satrs-example/src/acs/mgm.rs

@@ -1,12 +1,18 @@
 use derive_new::new;
 use satrs::hk::{HkRequest, HkRequestVariant};
+use satrs::power::{PowerSwitchInfo, PowerSwitcherCommandSender};
 use satrs::queue::{GenericSendError, GenericTargetedMessagingError};
-use satrs::spacepackets::ecss::hk;
+use satrs_example::{DeviceMode, TimestampHelper};
-use satrs::spacepackets::ecss::tm::{PusTmCreator, PusTmSecondaryHeader};
+use satrs_minisim::acs::lis3mdl::{
-use satrs::spacepackets::SpHeader;
+    MgmLis3MdlReply, MgmLis3RawValues, FIELD_LSB_PER_GAUSS_4_SENS, GAUSS_TO_MICROTESLA_FACTOR,
-use satrs_example::{DeviceMode, TimeStampHelper};
+};
+use satrs_minisim::acs::MgmRequestLis3Mdl;
+use satrs_minisim::eps::PcduSwitch;
+use satrs_minisim::{SerializableSimMsgPayload, SimReply, SimRequest};
+use std::fmt::Debug;
 use std::sync::mpsc::{self};
 use std::sync::{Arc, Mutex};
+use std::time::Duration;
 
 use satrs::mode::{
     ModeAndSubmode, ModeError, ModeProvider, ModeReply, ModeRequest, ModeRequestHandler,
@@ -15,38 +21,106 @@ use satrs::pus::{EcssTmSender, PusTmVariant};
 use satrs::request::{GenericMessage, MessageMetadata, UniqueApidTargetId};
 use satrs_example::config::components::PUS_MODE_SERVICE;
 
+use crate::hk::PusHkHelper;
 use crate::pus::hk::{HkReply, HkReplyVariant};
 use crate::requests::CompositeRequest;
 
 use serde::{Deserialize, Serialize};
 
-const GAUSS_TO_MICROTESLA_FACTOR: f32 = 100.0;
+pub const NR_OF_DATA_AND_CFG_REGISTERS: usize = 14;
-// This is the selected resoltion for the STM LIS3MDL device for the 4 Gauss sensitivity setting.
+
-const FIELD_LSB_PER_GAUSS_4_SENS: f32 = 1.0 / 6842.0;
+// Register adresses to access various bytes from the raw reply.
+pub const X_LOWBYTE_IDX: usize = 9;
+pub const Y_LOWBYTE_IDX: usize = 11;
+pub const Z_LOWBYTE_IDX: usize = 13;
+
+#[derive(Debug, Copy, Clone, Serialize, Deserialize)]
+#[repr(u32)]
+pub enum SetId {
+    SensorData = 0,
+}
+
+#[derive(Default, Debug, PartialEq, Eq)]
+pub enum TransitionState {
+    #[default]
+    Idle,
+    PowerSwitching,
+    Done,
+}
 
 pub trait SpiInterface {
-    type Error;
+    type Error: Debug;
     fn transfer(&mut self, tx: &[u8], rx: &mut [u8]) -> Result<(), Self::Error>;
 }
 
 #[derive(Default)]
 pub struct SpiDummyInterface {
-    pub dummy_val_0: i16,
+    pub dummy_values: MgmLis3RawValues,
-    pub dummy_val_1: i16,
-    pub dummy_val_2: i16,
 }
 
 impl SpiInterface for SpiDummyInterface {
     type Error = ();
 
     fn transfer(&mut self, _tx: &[u8], rx: &mut [u8]) -> Result<(), Self::Error> {
-        rx[0..2].copy_from_slice(&self.dummy_val_0.to_be_bytes());
+        rx[X_LOWBYTE_IDX..X_LOWBYTE_IDX + 2].copy_from_slice(&self.dummy_values.x.to_le_bytes());
-        rx[2..4].copy_from_slice(&self.dummy_val_1.to_be_bytes());
+        rx[Y_LOWBYTE_IDX..Y_LOWBYTE_IDX + 2].copy_from_slice(&self.dummy_values.y.to_be_bytes());
-        rx[4..6].copy_from_slice(&self.dummy_val_2.to_be_bytes());
+        rx[Z_LOWBYTE_IDX..Z_LOWBYTE_IDX + 2].copy_from_slice(&self.dummy_values.z.to_be_bytes());
         Ok(())
     }
 }
 
+pub struct SpiSimInterface {
+    pub sim_request_tx: mpsc::Sender<SimRequest>,
+    pub sim_reply_rx: mpsc::Receiver<SimReply>,
+}
+
+impl SpiInterface for SpiSimInterface {
+    type Error = ();
+
+    // Right now, we only support requesting sensor data and not configuration of the sensor.
+    fn transfer(&mut self, _tx: &[u8], rx: &mut [u8]) -> Result<(), Self::Error> {
+        let mgm_sensor_request = MgmRequestLis3Mdl::RequestSensorData;
+        if let Err(e) = self
+            .sim_request_tx
+            .send(SimRequest::new_with_epoch_time(mgm_sensor_request))
+        {
+            log::error!("failed to send MGM LIS3 request: {}", e);
+        }
+        match self.sim_reply_rx.recv_timeout(Duration::from_millis(50)) {
+            Ok(sim_reply) => {
+                let sim_reply_lis3 = MgmLis3MdlReply::from_sim_message(&sim_reply)
+                    .expect("failed to parse LIS3 reply");
+                rx[X_LOWBYTE_IDX..X_LOWBYTE_IDX + 2]
+                    .copy_from_slice(&sim_reply_lis3.raw.x.to_le_bytes());
+                rx[Y_LOWBYTE_IDX..Y_LOWBYTE_IDX + 2]
+                    .copy_from_slice(&sim_reply_lis3.raw.y.to_le_bytes());
+                rx[Z_LOWBYTE_IDX..Z_LOWBYTE_IDX + 2]
+                    .copy_from_slice(&sim_reply_lis3.raw.z.to_le_bytes());
+            }
+            Err(e) => {
+                log::warn!("MGM LIS3 SIM reply timeout: {}", e);
+            }
+        }
+        Ok(())
+    }
+}
+
+pub enum SpiSimInterfaceWrapper {
+    Dummy(SpiDummyInterface),
+    Sim(SpiSimInterface),
+}
+
+impl SpiInterface for SpiSimInterfaceWrapper {
+    type Error = ();
+
+    fn transfer(&mut self, tx: &[u8], rx: &mut [u8]) -> Result<(), Self::Error> {
+        match self {
+            SpiSimInterfaceWrapper::Dummy(dummy) => dummy.transfer(tx, rx),
+            SpiSimInterfaceWrapper::Sim(sim_if) => sim_if.transfer(tx, rx),
+        }
+    }
+}
+
 #[derive(Default, Debug, Copy, Clone, Serialize, Deserialize)]
 pub struct MgmData {
     pub valid: bool,
@@ -57,61 +131,85 @@ pub struct MgmData {
 
 pub struct MpscModeLeafInterface {
     pub request_rx: mpsc::Receiver<GenericMessage<ModeRequest>>,
-    pub reply_tx_to_pus: mpsc::Sender<GenericMessage<ModeReply>>,
+    pub reply_to_pus_tx: mpsc::Sender<GenericMessage<ModeReply>>,
-    pub reply_tx_to_parent: mpsc::Sender<GenericMessage<ModeReply>>,
+    pub reply_to_parent_tx: mpsc::SyncSender<GenericMessage<ModeReply>>,
+}
+
+#[derive(Default)]
+pub struct BufWrapper {
+    tx_buf: [u8; 32],
+    rx_buf: [u8; 32],
+    tm_buf: [u8; 32],
+}
+
+pub struct ModeHelpers {
+    current: ModeAndSubmode,
+    target: Option<ModeAndSubmode>,
+    requestor_info: Option<MessageMetadata>,
+    transition_state: TransitionState,
+}
+
+impl Default for ModeHelpers {
+    fn default() -> Self {
+        Self {
+            current: ModeAndSubmode::new(DeviceMode::Off as u32, 0),
+            target: Default::default(),
+            requestor_info: Default::default(),
+            transition_state: Default::default(),
+        }
+    }
 }
 
 /// Example MGM device handler strongly based on the LIS3MDL MEMS device.
 #[derive(new)]
 #[allow(clippy::too_many_arguments)]
-pub struct MgmHandlerLis3Mdl<ComInterface: SpiInterface, TmSender: EcssTmSender> {
+pub struct MgmHandlerLis3Mdl<
+    ComInterface: SpiInterface,
+    TmSender: EcssTmSender,
+    SwitchHelper: PowerSwitchInfo<PcduSwitch> + PowerSwitcherCommandSender<PcduSwitch>,
+> {
     id: UniqueApidTargetId,
     dev_str: &'static str,
     mode_interface: MpscModeLeafInterface,
-    composite_request_receiver: mpsc::Receiver<GenericMessage<CompositeRequest>>,
+    composite_request_rx: mpsc::Receiver<GenericMessage<CompositeRequest>>,
-    hk_reply_sender: mpsc::Sender<GenericMessage<HkReply>>,
+    hk_reply_tx: mpsc::Sender<GenericMessage<HkReply>>,
+    switch_helper: SwitchHelper,
     tm_sender: TmSender,
-    com_interface: ComInterface,
+    pub com_interface: ComInterface,
     shared_mgm_set: Arc<Mutex<MgmData>>,
-    #[new(value = "ModeAndSubmode::new(satrs_example::DeviceMode::Off as u32, 0)")]
+    #[new(value = "PusHkHelper::new(id)")]
-    mode_and_submode: ModeAndSubmode,
+    hk_helper: PusHkHelper,
     #[new(default)]
-    tx_buf: [u8; 12],
+    mode_helpers: ModeHelpers,
     #[new(default)]
-    rx_buf: [u8; 12],
+    bufs: BufWrapper,
     #[new(default)]
-    tm_buf: [u8; 16],
+    stamp_helper: TimestampHelper,
-    #[new(default)]
-    stamp_helper: TimeStampHelper,
 }
 
-impl<ComInterface: SpiInterface, TmSender: EcssTmSender> MgmHandlerLis3Mdl<ComInterface, TmSender> {
+impl<
+        ComInterface: SpiInterface,
+        TmSender: EcssTmSender,
+        SwitchHelper: PowerSwitchInfo<PcduSwitch> + PowerSwitcherCommandSender<PcduSwitch>,
+    > MgmHandlerLis3Mdl<ComInterface, TmSender, SwitchHelper>
+{
     pub fn periodic_operation(&mut self) {
         self.stamp_helper.update_from_now();
         // Handle requests.
         self.handle_composite_requests();
         self.handle_mode_requests();
+        if let Some(target_mode_submode) = self.mode_helpers.target {
+            self.handle_mode_transition(target_mode_submode);
+        }
         if self.mode() == DeviceMode::Normal as u32 {
             log::trace!("polling LIS3MDL sensor {}", self.dev_str);
-            // Communicate with the device.
+            self.poll_sensor();
-            let result = self.com_interface.transfer(&self.tx_buf, &mut self.rx_buf);
-            assert!(result.is_ok());
-            // Actual data begins on the second byte, similarly to how a lot of SPI devices behave.
-            let x_raw = i16::from_be_bytes(self.rx_buf[1..3].try_into().unwrap());
-            let y_raw = i16::from_be_bytes(self.rx_buf[3..5].try_into().unwrap());
-            let z_raw = i16::from_be_bytes(self.rx_buf[5..7].try_into().unwrap());
-            // Simple scaling to retrieve the float value, assuming a sensor resolution of
-            let mut mgm_guard = self.shared_mgm_set.lock().unwrap();
-            mgm_guard.x = x_raw as f32 * GAUSS_TO_MICROTESLA_FACTOR * FIELD_LSB_PER_GAUSS_4_SENS;
-            mgm_guard.y = y_raw as f32 * GAUSS_TO_MICROTESLA_FACTOR * FIELD_LSB_PER_GAUSS_4_SENS;
-            mgm_guard.z = z_raw as f32 * GAUSS_TO_MICROTESLA_FACTOR * FIELD_LSB_PER_GAUSS_4_SENS;
-            drop(mgm_guard);
         }
     }
 
     pub fn handle_composite_requests(&mut self) {
         loop {
-            match self.composite_request_receiver.try_recv() {
+            match self.composite_request_rx.try_recv() {
                 Ok(ref msg) => match &msg.message {
                     CompositeRequest::Hk(hk_request) => {
                         self.handle_hk_request(&msg.requestor_info, hk_request)
@@ -139,34 +237,33 @@ impl<ComInterface: SpiInterface, TmSender: EcssTmSender> MgmHandlerLis3Mdl<ComIn
     pub fn handle_hk_request(&mut self, requestor_info: &MessageMetadata, hk_request: &HkRequest) {
         match hk_request.variant {
             HkRequestVariant::OneShot => {
-                self.hk_reply_sender
-                    .send(GenericMessage::new(
-                        *requestor_info,
-                        HkReply::new(hk_request.unique_id, HkReplyVariant::Ack),
-                    ))
-                    .expect("failed to send HK reply");
-                let sec_header = PusTmSecondaryHeader::new(
-                    3,
-                    hk::Subservice::TmHkPacket as u8,
-                    0,
-                    0,
-                    self.stamp_helper.stamp(),
-                );
                 let mgm_snapshot = *self.shared_mgm_set.lock().unwrap();
-                // Use binary serialization here. We want the data to be tightly packed.
+                if let Ok(hk_tm) = self.hk_helper.generate_hk_report_packet(
-                self.tm_buf[0] = mgm_snapshot.valid as u8;
+                    self.stamp_helper.stamp(),
-                self.tm_buf[1..5].copy_from_slice(&mgm_snapshot.x.to_be_bytes());
+                    SetId::SensorData as u32,
-                self.tm_buf[5..9].copy_from_slice(&mgm_snapshot.y.to_be_bytes());
+                    &mut |hk_buf| {
-                self.tm_buf[9..13].copy_from_slice(&mgm_snapshot.z.to_be_bytes());
+                        hk_buf[0] = mgm_snapshot.valid as u8;
-                let hk_tm = PusTmCreator::new(
+                        hk_buf[1..5].copy_from_slice(&mgm_snapshot.x.to_be_bytes());
-                    SpHeader::new_from_apid(self.id.apid),
+                        hk_buf[5..9].copy_from_slice(&mgm_snapshot.y.to_be_bytes());
-                    sec_header,
+                        hk_buf[9..13].copy_from_slice(&mgm_snapshot.z.to_be_bytes());
-                    &self.tm_buf[0..12],
+                        Ok(13)
-                    true,
+                    },
-                );
+                    &mut self.bufs.tm_buf,
-                self.tm_sender
+                ) {
-                    .send_tm(self.id.id(), PusTmVariant::Direct(hk_tm))
+                    // TODO: If sending the TM fails, we should also send a failure reply.
-                    .expect("failed to send HK TM");
+                    self.tm_sender
+                        .send_tm(self.id.id(), PusTmVariant::Direct(hk_tm))
+                        .expect("failed to send HK TM");
+                    self.hk_reply_tx
+                        .send(GenericMessage::new(
+                            *requestor_info,
+                            HkReply::new(hk_request.unique_id, HkReplyVariant::Ack),
+                        ))
+                        .expect("failed to send HK reply");
+                } else {
+                    // TODO: Send back failure reply. Need result code for this.
+                    log::error!("TM buffer too small to generate HK data");
+                }
             }
             HkRequestVariant::EnablePeriodic => todo!(),
             HkRequestVariant::DisablePeriodic => todo!(),
@@ -199,20 +296,91 @@ impl<ComInterface: SpiInterface, TmSender: EcssTmSender> MgmHandlerLis3Mdl<ComIn
             }
         }
     }
-}
 
-impl<ComInterface: SpiInterface, TmSender: EcssTmSender> ModeProvider
+    pub fn poll_sensor(&mut self) {
-    for MgmHandlerLis3Mdl<ComInterface, TmSender>
+        // Communicate with the device. This is actually how to read the data from the LIS3 device
-{
+        // SPI interface.
-    fn mode_and_submode(&self) -> ModeAndSubmode {
+        self.com_interface
-        self.mode_and_submode
+            .transfer(
+                &self.bufs.tx_buf[0..NR_OF_DATA_AND_CFG_REGISTERS + 1],
+                &mut self.bufs.rx_buf[0..NR_OF_DATA_AND_CFG_REGISTERS + 1],
+            )
+            .expect("failed to transfer data");
+        let x_raw = i16::from_le_bytes(
+            self.bufs.rx_buf[X_LOWBYTE_IDX..X_LOWBYTE_IDX + 2]
+                .try_into()
+                .unwrap(),
+        );
+        let y_raw = i16::from_le_bytes(
+            self.bufs.rx_buf[Y_LOWBYTE_IDX..Y_LOWBYTE_IDX + 2]
+                .try_into()
+                .unwrap(),
+        );
+        let z_raw = i16::from_le_bytes(
+            self.bufs.rx_buf[Z_LOWBYTE_IDX..Z_LOWBYTE_IDX + 2]
+                .try_into()
+                .unwrap(),
+        );
+        // Simple scaling to retrieve the float value, assuming the best sensor resolution.
+        let mut mgm_guard = self.shared_mgm_set.lock().unwrap();
+        mgm_guard.x = x_raw as f32 * GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS;
+        mgm_guard.y = y_raw as f32 * GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS;
+        mgm_guard.z = z_raw as f32 * GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS;
+        mgm_guard.valid = true;
+        drop(mgm_guard);
+    }
+
+    pub fn handle_mode_transition(&mut self, target_mode_submode: ModeAndSubmode) {
+        if target_mode_submode.mode() == DeviceMode::On as u32
+            || target_mode_submode.mode() == DeviceMode::Normal as u32
+        {
+            if self.mode_helpers.transition_state == TransitionState::Idle {
+                let result = self
+                    .switch_helper
+                    .send_switch_on_cmd(MessageMetadata::new(0, self.id.id()), PcduSwitch::Mgm);
+                if result.is_err() {
+                    // Could not send switch command.. still continue with transition.
+                    log::error!("failed to send switch on command");
+                }
+                self.mode_helpers.transition_state = TransitionState::PowerSwitching;
+            }
+            if self.mode_helpers.transition_state == TransitionState::PowerSwitching
+                && self
+                    .switch_helper
+                    .is_switch_on(PcduSwitch::Mgm)
+                    .expect("switch info error")
+            {
+                self.mode_helpers.transition_state = TransitionState::Done;
+            }
+            if self.mode_helpers.transition_state == TransitionState::Done {
+                self.mode_helpers.current = self.mode_helpers.target.unwrap();
+                self.handle_mode_reached(self.mode_helpers.requestor_info)
+                    .expect("failed to handle mode reached");
+                self.mode_helpers.transition_state = TransitionState::Idle;
+            }
+        }
     }
 }
 
-impl<ComInterface: SpiInterface, TmSender: EcssTmSender> ModeRequestHandler
+impl<
-    for MgmHandlerLis3Mdl<ComInterface, TmSender>
+        ComInterface: SpiInterface,
+        TmSender: EcssTmSender,
+        SwitchHelper: PowerSwitchInfo<PcduSwitch> + PowerSwitcherCommandSender<PcduSwitch>,
+    > ModeProvider for MgmHandlerLis3Mdl<ComInterface, TmSender, SwitchHelper>
+{
+    fn mode_and_submode(&self) -> ModeAndSubmode {
+        self.mode_helpers.current
+    }
+}
+
+impl<
+        ComInterface: SpiInterface,
+        TmSender: EcssTmSender,
+        SwitchHelper: PowerSwitchInfo<PcduSwitch> + PowerSwitcherCommandSender<PcduSwitch>,
+    > ModeRequestHandler for MgmHandlerLis3Mdl<ComInterface, TmSender, SwitchHelper>
 {
     type Error = ModeError;
+
     fn start_transition(
         &mut self,
         requestor: MessageMetadata,
@@ -223,8 +391,18 @@ impl<ComInterface: SpiInterface, TmSender: EcssTmSender> ModeRequestHandler
             self.dev_str,
             mode_and_submode
         );
-        self.mode_and_submode = mode_and_submode;
+        self.mode_helpers.current = mode_and_submode;
-        self.handle_mode_reached(Some(requestor))?;
+        if mode_and_submode.mode() == DeviceMode::Off as u32 {
+            self.shared_mgm_set.lock().unwrap().valid = false;
+            self.handle_mode_reached(Some(requestor))?;
+        } else if mode_and_submode.mode() == DeviceMode::Normal as u32
+            || mode_and_submode.mode() == DeviceMode::On as u32
+        {
+            // TODO: Write helper method for the struct? Might help for other handlers as well..
+            self.mode_helpers.transition_state = TransitionState::Idle;
+            self.mode_helpers.requestor_info = Some(requestor);
+            self.mode_helpers.target = Some(mode_and_submode);
+        }
         Ok(())
     }
 
@@ -232,7 +410,7 @@ impl<ComInterface: SpiInterface, TmSender: EcssTmSender> ModeRequestHandler
         log::info!(
             "{} announcing mode: {:?}",
             self.dev_str,
-            self.mode_and_submode
+            self.mode_and_submode()
         );
     }
 
@@ -240,6 +418,7 @@ impl<ComInterface: SpiInterface, TmSender: EcssTmSender> ModeRequestHandler
         &mut self,
         requestor: Option<MessageMetadata>,
     ) -> Result<(), Self::Error> {
+        self.mode_helpers.target = None;
         self.announce_mode(requestor, false);
         if let Some(requestor) = requestor {
             if requestor.sender_id() != PUS_MODE_SERVICE.id() {
@@ -266,7 +445,7 @@ impl<ComInterface: SpiInterface, TmSender: EcssTmSender> ModeRequestHandler
             );
         }
         self.mode_interface
-            .reply_tx_to_pus
+            .reply_to_pus_tx
             .send(GenericMessage::new(requestor, reply))
             .map_err(|_| GenericTargetedMessagingError::Send(GenericSendError::RxDisconnected))?;
         Ok(())
@@ -280,3 +459,193 @@ impl<ComInterface: SpiInterface, TmSender: EcssTmSender> ModeRequestHandler
         Ok(())
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use std::sync::{mpsc, Arc};
+
+    use satrs::{
+        mode::{ModeReply, ModeRequest},
+        power::SwitchStateBinary,
+        request::{GenericMessage, UniqueApidTargetId},
+        tmtc::PacketAsVec,
+    };
+    use satrs_example::config::components::Apid;
+    use satrs_minisim::acs::lis3mdl::MgmLis3RawValues;
+
+    use crate::{eps::TestSwitchHelper, pus::hk::HkReply, requests::CompositeRequest};
+
+    use super::*;
+
+    #[derive(Default)]
+    pub struct TestSpiInterface {
+        pub call_count: u32,
+        pub next_mgm_data: MgmLis3RawValues,
+    }
+
+    impl SpiInterface for TestSpiInterface {
+        type Error = ();
+
+        fn transfer(&mut self, _tx: &[u8], rx: &mut [u8]) -> Result<(), Self::Error> {
+            rx[X_LOWBYTE_IDX..X_LOWBYTE_IDX + 2]
+                .copy_from_slice(&self.next_mgm_data.x.to_le_bytes());
+            rx[Y_LOWBYTE_IDX..Y_LOWBYTE_IDX + 2]
+                .copy_from_slice(&self.next_mgm_data.y.to_le_bytes());
+            rx[Z_LOWBYTE_IDX..Z_LOWBYTE_IDX + 2]
+                .copy_from_slice(&self.next_mgm_data.z.to_le_bytes());
+            self.call_count += 1;
+            Ok(())
+        }
+    }
+
+    pub struct MgmTestbench {
+        pub mode_request_tx: mpsc::Sender<GenericMessage<ModeRequest>>,
+        pub mode_reply_rx_to_pus: mpsc::Receiver<GenericMessage<ModeReply>>,
+        pub mode_reply_rx_to_parent: mpsc::Receiver<GenericMessage<ModeReply>>,
+        pub composite_request_tx: mpsc::Sender<GenericMessage<CompositeRequest>>,
+        pub hk_reply_rx: mpsc::Receiver<GenericMessage<HkReply>>,
+        pub tm_rx: mpsc::Receiver<PacketAsVec>,
+        pub handler:
+            MgmHandlerLis3Mdl<TestSpiInterface, mpsc::Sender<PacketAsVec>, TestSwitchHelper>,
+    }
+
+    impl MgmTestbench {
+        pub fn new() -> Self {
+            let (request_tx, request_rx) = mpsc::channel();
+            let (reply_tx_to_pus, reply_rx_to_pus) = mpsc::channel();
+            let (reply_tx_to_parent, reply_rx_to_parent) = mpsc::sync_channel(5);
+            let mode_interface = MpscModeLeafInterface {
+                request_rx,
+                reply_to_pus_tx: reply_tx_to_pus,
+                reply_to_parent_tx: reply_tx_to_parent,
+            };
+            let (composite_request_tx, composite_request_rx) = mpsc::channel();
+            let (hk_reply_tx, hk_reply_rx) = mpsc::channel();
+            let (tm_tx, tm_rx) = mpsc::channel::<PacketAsVec>();
+            let shared_mgm_set = Arc::default();
+            Self {
+                mode_request_tx: request_tx,
+                mode_reply_rx_to_pus: reply_rx_to_pus,
+                mode_reply_rx_to_parent: reply_rx_to_parent,
+                composite_request_tx,
+                tm_rx,
+                hk_reply_rx,
+                handler: MgmHandlerLis3Mdl::new(
+                    UniqueApidTargetId::new(Apid::Acs as u16, 1),
+                    "test-mgm",
+                    mode_interface,
+                    composite_request_rx,
+                    hk_reply_tx,
+                    TestSwitchHelper::default(),
+                    tm_tx,
+                    TestSpiInterface::default(),
+                    shared_mgm_set,
+                ),
+            }
+        }
+    }
+
+    #[test]
+    fn test_basic_handler() {
+        let mut testbench = MgmTestbench::new();
+        assert_eq!(testbench.handler.com_interface.call_count, 0);
+        assert_eq!(
+            testbench.handler.mode_and_submode().mode(),
+            DeviceMode::Off as u32
+        );
+        assert_eq!(testbench.handler.mode_and_submode().submode(), 0_u16);
+        testbench.handler.periodic_operation();
+        // Handler is OFF, no changes expected.
+        assert_eq!(testbench.handler.com_interface.call_count, 0);
+        assert_eq!(
+            testbench.handler.mode_and_submode().mode(),
+            DeviceMode::Off as u32
+        );
+        assert_eq!(testbench.handler.mode_and_submode().submode(), 0_u16);
+    }
+
+    #[test]
+    fn test_normal_handler() {
+        let mut testbench = MgmTestbench::new();
+        testbench
+            .mode_request_tx
+            .send(GenericMessage::new(
+                MessageMetadata::new(0, PUS_MODE_SERVICE.id()),
+                ModeRequest::SetMode(ModeAndSubmode::new(DeviceMode::Normal as u32, 0)),
+            ))
+            .expect("failed to send mode request");
+        testbench.handler.periodic_operation();
+        assert_eq!(
+            testbench.handler.mode_and_submode().mode(),
+            DeviceMode::Normal as u32
+        );
+        assert_eq!(testbench.handler.mode_and_submode().submode(), 0);
+
+        // Verify power switch handling.
+        let mut switch_requests = testbench.handler.switch_helper.switch_requests.borrow_mut();
+        assert_eq!(switch_requests.len(), 1);
+        let switch_req = switch_requests.pop_front().expect("no switch request");
+        assert_eq!(switch_req.target_state, SwitchStateBinary::On);
+        assert_eq!(switch_req.switch_id, PcduSwitch::Mgm);
+        let mut switch_info_requests = testbench
+            .handler
+            .switch_helper
+            .switch_info_requests
+            .borrow_mut();
+        assert_eq!(switch_info_requests.len(), 1);
+        let switch_info_req = switch_info_requests.pop_front().expect("no switch request");
+        assert_eq!(switch_info_req, PcduSwitch::Mgm);
+
+        let mode_reply = testbench
+            .mode_reply_rx_to_pus
+            .try_recv()
+            .expect("no mode reply generated");
+        match mode_reply.message {
+            ModeReply::ModeReply(mode) => {
+                assert_eq!(mode.mode(), DeviceMode::Normal as u32);
+                assert_eq!(mode.submode(), 0);
+            }
+            _ => panic!("unexpected mode reply"),
+        }
+        // The device should have been polled once.
+        assert_eq!(testbench.handler.com_interface.call_count, 1);
+        let mgm_set = *testbench.handler.shared_mgm_set.lock().unwrap();
+        assert!(mgm_set.x < 0.001);
+        assert!(mgm_set.y < 0.001);
+        assert!(mgm_set.z < 0.001);
+        assert!(mgm_set.valid);
+    }
+
+    #[test]
+    fn test_normal_handler_mgm_set_conversion() {
+        let mut testbench = MgmTestbench::new();
+        let raw_values = MgmLis3RawValues {
+            x: 1000,
+            y: -1000,
+            z: 1000,
+        };
+        testbench.handler.com_interface.next_mgm_data = raw_values;
+        testbench
+            .mode_request_tx
+            .send(GenericMessage::new(
+                MessageMetadata::new(0, PUS_MODE_SERVICE.id()),
+                ModeRequest::SetMode(ModeAndSubmode::new(DeviceMode::Normal as u32, 0)),
+            ))
+            .expect("failed to send mode request");
+        testbench.handler.periodic_operation();
+        let mgm_set = *testbench.handler.shared_mgm_set.lock().unwrap();
+        let expected_x =
+            raw_values.x as f32 * GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS;
+        let expected_y =
+            raw_values.y as f32 * GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS;
+        let expected_z =
+            raw_values.z as f32 * GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS;
+        let x_diff = (mgm_set.x - expected_x).abs();
+        let y_diff = (mgm_set.y - expected_y).abs();
+        let z_diff = (mgm_set.z - expected_z).abs();
+        assert!(x_diff < 0.001, "x diff too large: {}", x_diff);
+        assert!(y_diff < 0.001, "y diff too large: {}", y_diff);
+        assert!(z_diff < 0.001, "z diff too large: {}", z_diff);
+        assert!(mgm_set.valid);
+    }
+}

satrs-example/src/config.rs

@@ -132,6 +132,7 @@ pub mod components {
         Acs = 3,
         Cfdp = 4,
         Tmtc = 5,
+        Eps = 6,
     }
 
     // Component IDs for components with the PUS APID.
@@ -150,6 +151,11 @@ pub mod components {
         Mgm0 = 0,
     }
 
+    #[derive(Copy, Clone, PartialEq, Eq)]
+    pub enum EpsId {
+        Pcdu = 0,
+    }
+
     #[derive(Copy, Clone, PartialEq, Eq)]
     pub enum TmtcId {
         UdpServer = 0,
@@ -172,6 +178,8 @@ pub mod components {
         UniqueApidTargetId::new(Apid::Sched as u16, 0);
     pub const MGM_HANDLER_0: UniqueApidTargetId =
         UniqueApidTargetId::new(Apid::Acs as u16, AcsId::Mgm0 as u32);
+    pub const PCDU_HANDLER: UniqueApidTargetId =
+        UniqueApidTargetId::new(Apid::Eps as u16, EpsId::Pcdu as u32);
     pub const UDP_SERVER: UniqueApidTargetId =
         UniqueApidTargetId::new(Apid::Tmtc as u16, TmtcId::UdpServer as u32);
     pub const TCP_SERVER: UniqueApidTargetId =
@@ -224,7 +232,7 @@ pub mod pool {
 
 pub mod tasks {
     pub const FREQ_MS_UDP_TMTC: u64 = 200;
-    pub const FREQ_MS_EVENT_HANDLING: u64 = 400;
     pub const FREQ_MS_AOCS: u64 = 500;
     pub const FREQ_MS_PUS_STACK: u64 = 200;
+    pub const SIM_CLIENT_IDLE_DELAY_MS: u64 = 5;
 }

satrs-example/src/eps/mod.rs

@@ -0,0 +1,195 @@
+use derive_new::new;
+use std::{cell::RefCell, collections::VecDeque, sync::mpsc, time::Duration};
+
+use satrs::{
+    power::{
+        PowerSwitchInfo, PowerSwitcherCommandSender, SwitchRequest, SwitchState, SwitchStateBinary,
+    },
+    queue::GenericSendError,
+    request::{GenericMessage, MessageMetadata},
+};
+use satrs_minisim::eps::{PcduSwitch, SwitchMapWrapper};
+use thiserror::Error;
+
+use self::pcdu::SharedSwitchSet;
+
+pub mod pcdu;
+
+#[derive(new, Clone)]
+pub struct PowerSwitchHelper {
+    switcher_tx: mpsc::SyncSender<GenericMessage<SwitchRequest>>,
+    shared_switch_set: SharedSwitchSet,
+}
+
+#[derive(Debug, Error, Copy, Clone, PartialEq, Eq)]
+pub enum SwitchCommandingError {
+    #[error("send error: {0}")]
+    Send(#[from] GenericSendError),
+}
+
+#[derive(Debug, Error, Copy, Clone, PartialEq, Eq)]
+pub enum SwitchInfoError {
+    /// This is a configuration error which should not occur.
+    #[error("switch ID not in map")]
+    SwitchIdNotInMap(PcduSwitch),
+    #[error("switch set invalid")]
+    SwitchSetInvalid,
+}
+
+impl PowerSwitchInfo<PcduSwitch> for PowerSwitchHelper {
+    type Error = SwitchInfoError;
+
+    fn switch_state(
+        &self,
+        switch_id: PcduSwitch,
+    ) -> Result<satrs::power::SwitchState, Self::Error> {
+        let switch_set = self
+            .shared_switch_set
+            .lock()
+            .expect("failed to lock switch set");
+        if !switch_set.valid {
+            return Err(SwitchInfoError::SwitchSetInvalid);
+        }
+
+        if let Some(state) = switch_set.switch_map.get(&switch_id) {
+            return Ok(*state);
+        }
+        Err(SwitchInfoError::SwitchIdNotInMap(switch_id))
+    }
+
+    fn switch_delay_ms(&self) -> Duration {
+        // Here, we could set device specific switch delays theoretically. Set it to this value
+        // for now.
+        Duration::from_millis(1000)
+    }
+}
+
+impl PowerSwitcherCommandSender<PcduSwitch> for PowerSwitchHelper {
+    type Error = SwitchCommandingError;
+
+    fn send_switch_on_cmd(
+        &self,
+        requestor_info: satrs::request::MessageMetadata,
+        switch_id: PcduSwitch,
+    ) -> Result<(), Self::Error> {
+        self.switcher_tx
+            .send_switch_on_cmd(requestor_info, switch_id)?;
+        Ok(())
+    }
+
+    fn send_switch_off_cmd(
+        &self,
+        requestor_info: satrs::request::MessageMetadata,
+        switch_id: PcduSwitch,
+    ) -> Result<(), Self::Error> {
+        self.switcher_tx
+            .send_switch_off_cmd(requestor_info, switch_id)?;
+        Ok(())
+    }
+}
+
+#[derive(new)]
+pub struct SwitchRequestInfo {
+    pub requestor_info: MessageMetadata,
+    pub switch_id: PcduSwitch,
+    pub target_state: satrs::power::SwitchStateBinary,
+}
+
+// Test switch helper which can be used for unittests.
+pub struct TestSwitchHelper {
+    pub switch_requests: RefCell<VecDeque<SwitchRequestInfo>>,
+    pub switch_info_requests: RefCell<VecDeque<PcduSwitch>>,
+    pub switch_delay_request_count: u32,
+    pub next_switch_delay: Duration,
+    pub switch_map: RefCell<SwitchMapWrapper>,
+    pub switch_map_valid: bool,
+}
+
+impl Default for TestSwitchHelper {
+    fn default() -> Self {
+        Self {
+            switch_requests: Default::default(),
+            switch_info_requests: Default::default(),
+            switch_delay_request_count: Default::default(),
+            next_switch_delay: Duration::from_millis(1000),
+            switch_map: Default::default(),
+            switch_map_valid: true,
+        }
+    }
+}
+
+impl PowerSwitchInfo<PcduSwitch> for TestSwitchHelper {
+    type Error = SwitchInfoError;
+
+    fn switch_state(
+        &self,
+        switch_id: PcduSwitch,
+    ) -> Result<satrs::power::SwitchState, Self::Error> {
+        let mut switch_info_requests_mut = self.switch_info_requests.borrow_mut();
+        switch_info_requests_mut.push_back(switch_id);
+        if !self.switch_map_valid {
+            return Err(SwitchInfoError::SwitchSetInvalid);
+        }
+        let switch_map_mut = self.switch_map.borrow_mut();
+        if let Some(state) = switch_map_mut.0.get(&switch_id) {
+            return Ok(*state);
+        }
+        Err(SwitchInfoError::SwitchIdNotInMap(switch_id))
+    }
+
+    fn switch_delay_ms(&self) -> Duration {
+        self.next_switch_delay
+    }
+}
+
+impl PowerSwitcherCommandSender<PcduSwitch> for TestSwitchHelper {
+    type Error = SwitchCommandingError;
+
+    fn send_switch_on_cmd(
+        &self,
+        requestor_info: MessageMetadata,
+        switch_id: PcduSwitch,
+    ) -> Result<(), Self::Error> {
+        let mut switch_requests_mut = self.switch_requests.borrow_mut();
+        switch_requests_mut.push_back(SwitchRequestInfo {
+            requestor_info,
+            switch_id,
+            target_state: SwitchStateBinary::On,
+        });
+        // By default, the test helper immediately acknowledges the switch request by setting
+        // the appropriate switch state in the internal switch map.
+        let mut switch_map_mut = self.switch_map.borrow_mut();
+        if let Some(switch_state) = switch_map_mut.0.get_mut(&switch_id) {
+            *switch_state = SwitchState::On;
+        }
+        Ok(())
+    }
+
+    fn send_switch_off_cmd(
+        &self,
+        requestor_info: MessageMetadata,
+        switch_id: PcduSwitch,
+    ) -> Result<(), Self::Error> {
+        let mut switch_requests_mut = self.switch_requests.borrow_mut();
+        switch_requests_mut.push_back(SwitchRequestInfo {
+            requestor_info,
+            switch_id,
+            target_state: SwitchStateBinary::Off,
+        });
+        // By default, the test helper immediately acknowledges the switch request by setting
+        // the appropriate switch state in the internal switch map.
+        let mut switch_map_mut = self.switch_map.borrow_mut();
+        if let Some(switch_state) = switch_map_mut.0.get_mut(&switch_id) {
+            *switch_state = SwitchState::Off;
+        }
+        Ok(())
+    }
+}
+
+#[allow(dead_code)]
+impl TestSwitchHelper {
+    // Helper function which can be used to force a switch to another state for test purposes.
+    pub fn set_switch_state(&mut self, switch: PcduSwitch, state: SwitchState) {
+        self.switch_map.get_mut().0.insert(switch, state);
+    }
+}

satrs-example/src/eps/pcdu.rs

@@ -0,0 +1,467 @@
+use std::{
+    cell::RefCell,
+    collections::VecDeque,
+    sync::{mpsc, Arc, Mutex},
+};
+
+use derive_new::new;
+use num_enum::{IntoPrimitive, TryFromPrimitive};
+use satrs::{
+    hk::{HkRequest, HkRequestVariant},
+    mode::{ModeAndSubmode, ModeError, ModeProvider, ModeReply, ModeRequestHandler},
+    power::SwitchRequest,
+    pus::{EcssTmSender, PusTmVariant},
+    queue::{GenericSendError, GenericTargetedMessagingError},
+    request::{GenericMessage, MessageMetadata, UniqueApidTargetId},
+    spacepackets::ByteConversionError,
+};
+use satrs_example::{config::components::PUS_MODE_SERVICE, DeviceMode, TimestampHelper};
+use satrs_minisim::{
+    eps::{
+        PcduReply, PcduRequest, PcduSwitch, SwitchMap, SwitchMapBinaryWrapper, SwitchMapWrapper,
+    },
+    SerializableSimMsgPayload, SimReply, SimRequest,
+};
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    acs::mgm::MpscModeLeafInterface,
+    hk::PusHkHelper,
+    pus::hk::{HkReply, HkReplyVariant},
+    requests::CompositeRequest,
+};
+
+pub trait SerialInterface {
+    type Error: core::fmt::Debug;
+
+    /// Send some data via the serial interface.
+    fn send(&self, data: &[u8]) -> Result<(), Self::Error>;
+    /// Receive all replies received on the serial interface so far. This function takes a closure
+    /// and call its for each received packet, passing the received packet into it.
+    fn try_recv_replies<ReplyHandler: FnMut(&[u8])>(
+        &self,
+        f: ReplyHandler,
+    ) -> Result<(), Self::Error>;
+}
+
+#[derive(new)]
+pub struct SerialInterfaceToSim {
+    pub sim_request_tx: mpsc::Sender<SimRequest>,
+    pub sim_reply_rx: mpsc::Receiver<SimReply>,
+}
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
+#[repr(u32)]
+pub enum SetId {
+    SwitcherSet = 0,
+}
+
+impl SerialInterface for SerialInterfaceToSim {
+    type Error = ();
+
+    fn send(&self, data: &[u8]) -> Result<(), Self::Error> {
+        let request: SimRequest = serde_json::from_slice(data).unwrap();
+        self.sim_request_tx
+            .send(request)
+            .expect("failed to send request to simulation");
+        Ok(())
+    }
+
+    fn try_recv_replies<ReplyHandler: FnMut(&[u8])>(
+        &self,
+        mut f: ReplyHandler,
+    ) -> Result<(), Self::Error> {
+        loop {
+            match self.sim_reply_rx.try_recv() {
+                Ok(reply) => {
+                    let reply = serde_json::to_string(&reply).unwrap();
+                    f(reply.as_bytes());
+                }
+                Err(e) => match e {
+                    mpsc::TryRecvError::Empty => break,
+                    mpsc::TryRecvError::Disconnected => {
+                        log::warn!("sim reply sender has disconnected");
+                        break;
+                    }
+                },
+            }
+        }
+        Ok(())
+    }
+}
+
+#[derive(Default)]
+pub struct SerialInterfaceDummy {
+    // Need interior mutability here for both fields.
+    pub switch_map: RefCell<SwitchMapBinaryWrapper>,
+    pub reply_deque: RefCell<VecDeque<SimReply>>,
+}
+
+impl SerialInterface for SerialInterfaceDummy {
+    type Error = ();
+
+    fn send(&self, data: &[u8]) -> Result<(), Self::Error> {
+        let sim_req: SimRequest = serde_json::from_slice(data).unwrap();
+        let pcdu_req =
+            PcduRequest::from_sim_message(&sim_req).expect("PCDU request creation failed");
+        let switch_map_mut = &mut self.switch_map.borrow_mut().0;
+        match pcdu_req {
+            PcduRequest::SwitchDevice { switch, state } => {
+                match switch_map_mut.entry(switch) {
+                    std::collections::hash_map::Entry::Occupied(mut val) => {
+                        *val.get_mut() = state;
+                    }
+                    std::collections::hash_map::Entry::Vacant(vacant) => {
+                        vacant.insert(state);
+                    }
+                };
+            }
+            PcduRequest::RequestSwitchInfo => {
+                let mut reply_deque_mut = self.reply_deque.borrow_mut();
+                reply_deque_mut.push_back(SimReply::new(&PcduReply::SwitchInfo(
+                    self.switch_map.borrow().0.clone(),
+                )));
+            }
+        };
+        Ok(())
+    }
+
+    fn try_recv_replies<ReplyHandler: FnMut(&[u8])>(
+        &self,
+        mut f: ReplyHandler,
+    ) -> Result<(), Self::Error> {
+        if self.reply_deque.borrow().is_empty() {
+            return Ok(());
+        }
+        loop {
+            let mut reply_deque_mut = self.reply_deque.borrow_mut();
+            let next_reply = reply_deque_mut.pop_front().unwrap();
+            let reply = serde_json::to_string(&next_reply).unwrap();
+            f(reply.as_bytes());
+            if reply_deque_mut.is_empty() {
+                break;
+            }
+        }
+        Ok(())
+    }
+}
+
+pub enum SerialSimInterfaceWrapper {
+    Dummy(SerialInterfaceDummy),
+    Sim(SerialInterfaceToSim),
+}
+
+impl SerialInterface for SerialSimInterfaceWrapper {
+    type Error = ();
+
+    fn send(&self, data: &[u8]) -> Result<(), Self::Error> {
+        match self {
+            SerialSimInterfaceWrapper::Dummy(dummy) => dummy.send(data),
+            SerialSimInterfaceWrapper::Sim(sim) => sim.send(data),
+        }
+    }
+
+    fn try_recv_replies<ReplyHandler: FnMut(&[u8])>(
+        &self,
+        f: ReplyHandler,
+    ) -> Result<(), Self::Error> {
+        match self {
+            SerialSimInterfaceWrapper::Dummy(dummy) => dummy.try_recv_replies(f),
+            SerialSimInterfaceWrapper::Sim(sim) => sim.try_recv_replies(f),
+        }
+    }
+}
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub enum OpCode {
+    RegularOp = 0,
+    PollAndRecvReplies = 1,
+}
+
+#[derive(Clone, PartialEq, Eq, Default, Serialize, Deserialize)]
+pub struct SwitchSet {
+    pub valid: bool,
+    pub switch_map: SwitchMap,
+}
+
+pub type SharedSwitchSet = Arc<Mutex<SwitchSet>>;
+
+/// Example PCDU device handler.
+#[derive(new)]
+#[allow(clippy::too_many_arguments)]
+pub struct PcduHandler<ComInterface: SerialInterface, TmSender: EcssTmSender> {
+    id: UniqueApidTargetId,
+    dev_str: &'static str,
+    mode_interface: MpscModeLeafInterface,
+    composite_request_rx: mpsc::Receiver<GenericMessage<CompositeRequest>>,
+    hk_reply_tx: mpsc::Sender<GenericMessage<HkReply>>,
+    switch_request_rx: mpsc::Receiver<GenericMessage<SwitchRequest>>,
+    tm_sender: TmSender,
+    pub com_interface: ComInterface,
+    shared_switch_map: Arc<Mutex<SwitchSet>>,
+    #[new(value = "PusHkHelper::new(id)")]
+    hk_helper: PusHkHelper,
+    #[new(value = "ModeAndSubmode::new(satrs_example::DeviceMode::Off as u32, 0)")]
+    mode_and_submode: ModeAndSubmode,
+    #[new(default)]
+    stamp_helper: TimestampHelper,
+    #[new(value = "[0; 256]")]
+    tm_buf: [u8; 256],
+}
+
+impl<ComInterface: SerialInterface, TmSender: EcssTmSender> PcduHandler<ComInterface, TmSender> {
+    pub fn periodic_operation(&mut self, op_code: OpCode) {
+        match op_code {
+            OpCode::RegularOp => {
+                self.stamp_helper.update_from_now();
+                // Handle requests.
+                self.handle_composite_requests();
+                self.handle_mode_requests();
+                self.handle_switch_requests();
+                // Poll the switch states and/or telemetry regularly here.
+                if self.mode() == DeviceMode::Normal as u32 || self.mode() == DeviceMode::On as u32
+                {
+                    self.handle_periodic_commands();
+                }
+            }
+            OpCode::PollAndRecvReplies => {
+                self.poll_and_handle_replies();
+            }
+        }
+    }
+
+    pub fn handle_composite_requests(&mut self) {
+        loop {
+            match self.composite_request_rx.try_recv() {
+                Ok(ref msg) => match &msg.message {
+                    CompositeRequest::Hk(hk_request) => {
+                        self.handle_hk_request(&msg.requestor_info, hk_request)
+                    }
+                    // TODO: This object does not have actions (yet).. Still send back completion failure
+                    // reply.
+                    CompositeRequest::Action(_action_req) => {}
+                },
+
+                Err(e) => {
+                    if e != mpsc::TryRecvError::Empty {
+                        log::warn!(
+                            "{}: failed to receive composite request: {:?}",
+                            self.dev_str,
+                            e
+                        );
+                    } else {
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    pub fn handle_hk_request(&mut self, requestor_info: &MessageMetadata, hk_request: &HkRequest) {
+        match hk_request.variant {
+            HkRequestVariant::OneShot => {
+                if hk_request.unique_id == SetId::SwitcherSet as u32 {
+                    if let Ok(hk_tm) = self.hk_helper.generate_hk_report_packet(
+                        self.stamp_helper.stamp(),
+                        SetId::SwitcherSet as u32,
+                        &mut |hk_buf| {
+                            // Send TM down as JSON.
+                            let switch_map_snapshot = self
+                                .shared_switch_map
+                                .lock()
+                                .expect("failed to lock switch map")
+                                .clone();
+                            let switch_map_json = serde_json::to_string(&switch_map_snapshot)
+                                .expect("failed to serialize switch map");
+                            if switch_map_json.len() > hk_buf.len() {
+                                log::error!("switch map JSON too large for HK buffer");
+                                return Err(ByteConversionError::ToSliceTooSmall {
+                                    found: hk_buf.len(),
+                                    expected: switch_map_json.len(),
+                                });
+                            }
+                            Ok(switch_map_json.len())
+                        },
+                        &mut self.tm_buf,
+                    ) {
+                        self.tm_sender
+                            .send_tm(self.id.id(), PusTmVariant::Direct(hk_tm))
+                            .expect("failed to send HK TM");
+                        self.hk_reply_tx
+                            .send(GenericMessage::new(
+                                *requestor_info,
+                                HkReply::new(hk_request.unique_id, HkReplyVariant::Ack),
+                            ))
+                            .expect("failed to send HK reply");
+                    }
+                }
+            }
+            HkRequestVariant::EnablePeriodic => todo!(),
+            HkRequestVariant::DisablePeriodic => todo!(),
+            HkRequestVariant::ModifyCollectionInterval(_) => todo!(),
+        }
+    }
+
+    pub fn handle_periodic_commands(&self) {
+        let pcdu_req = PcduRequest::RequestSwitchInfo;
+        let pcdu_req_ser = serde_json::to_string(&pcdu_req).unwrap();
+        if let Err(_e) = self.com_interface.send(pcdu_req_ser.as_bytes()) {
+            log::warn!("polling PCDU switch info failed");
+        }
+    }
+
+    pub fn handle_mode_requests(&mut self) {
+        loop {
+            // TODO: Only allow one set mode request per cycle?
+            match self.mode_interface.request_rx.try_recv() {
+                Ok(msg) => {
+                    let result = self.handle_mode_request(msg);
+                    // TODO: Trigger event?
+                    if result.is_err() {
+                        log::warn!(
+                            "{}: mode request failed with error {:?}",
+                            self.dev_str,
+                            result.err().unwrap()
+                        );
+                    }
+                }
+                Err(e) => {
+                    if e != mpsc::TryRecvError::Empty {
+                        log::warn!("{}: failed to receive mode request: {:?}", self.dev_str, e);
+                    } else {
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    pub fn handle_switch_requests(&mut self) {
+        loop {
+            match self.switch_request_rx.try_recv() {
+                Ok(switch_req) => match PcduSwitch::try_from(switch_req.message.switch_id()) {
+                    Ok(pcdu_switch) => {
+                        let pcdu_req = PcduRequest::SwitchDevice {
+                            switch: pcdu_switch,
+                            state: switch_req.message.target_state(),
+                        };
+                        let pcdu_req_ser = serde_json::to_string(&pcdu_req).unwrap();
+                        self.com_interface
+                            .send(pcdu_req_ser.as_bytes())
+                            .expect("failed to send switch request to PCDU");
+                    }
+                    Err(e) => todo!("failed to convert switch ID {:?} to typed PCDU switch", e),
+                },
+                Err(e) => match e {
+                    mpsc::TryRecvError::Empty => break,
+                    mpsc::TryRecvError::Disconnected => {
+                        log::warn!("switch request receiver has disconnected");
+                        break;
+                    }
+                },
+            };
+        }
+    }
+
+    pub fn poll_and_handle_replies(&mut self) {
+        if let Err(e) = self.com_interface.try_recv_replies(|reply| {
+            let sim_reply: SimReply = serde_json::from_slice(reply).expect("invalid reply format");
+            let pcdu_reply = PcduReply::from_sim_message(&sim_reply).expect("invalid reply format");
+            match pcdu_reply {
+                PcduReply::SwitchInfo(switch_info) => {
+                    let switch_map_wrapper =
+                        SwitchMapWrapper::from_binary_switch_map_ref(&switch_info);
+                    self.shared_switch_map
+                        .lock()
+                        .expect("failed to lock switch map")
+                        .switch_map = switch_map_wrapper.0;
+                }
+            }
+        }) {
+            log::warn!("receiving PCDU replies failed: {:?}", e);
+        }
+    }
+}
+
+impl<ComInterface: SerialInterface, TmSender: EcssTmSender> ModeProvider
+    for PcduHandler<ComInterface, TmSender>
+{
+    fn mode_and_submode(&self) -> ModeAndSubmode {
+        self.mode_and_submode
+    }
+}
+
+impl<ComInterface: SerialInterface, TmSender: EcssTmSender> ModeRequestHandler
+    for PcduHandler<ComInterface, TmSender>
+{
+    type Error = ModeError;
+    fn start_transition(
+        &mut self,
+        requestor: MessageMetadata,
+        mode_and_submode: ModeAndSubmode,
+    ) -> Result<(), satrs::mode::ModeError> {
+        log::info!(
+            "{}: transitioning to mode {:?}",
+            self.dev_str,
+            mode_and_submode
+        );
+        self.mode_and_submode = mode_and_submode;
+        if mode_and_submode.mode() == DeviceMode::Off as u32 {
+            self.shared_switch_map.lock().unwrap().valid = false;
+        }
+        self.handle_mode_reached(Some(requestor))?;
+        Ok(())
+    }
+
+    fn announce_mode(&self, _requestor_info: Option<MessageMetadata>, _recursive: bool) {
+        log::info!(
+            "{} announcing mode: {:?}",
+            self.dev_str,
+            self.mode_and_submode
+        );
+    }
+
+    fn handle_mode_reached(
+        &mut self,
+        requestor: Option<MessageMetadata>,
+    ) -> Result<(), Self::Error> {
+        self.announce_mode(requestor, false);
+        if let Some(requestor) = requestor {
+            if requestor.sender_id() != PUS_MODE_SERVICE.id() {
+                log::warn!(
+                    "can not send back mode reply to sender {}",
+                    requestor.sender_id()
+                );
+            } else {
+                self.send_mode_reply(requestor, ModeReply::ModeReply(self.mode_and_submode()))?;
+            }
+        }
+        Ok(())
+    }
+
+    fn send_mode_reply(
+        &self,
+        requestor: MessageMetadata,
+        reply: ModeReply,
+    ) -> Result<(), Self::Error> {
+        if requestor.sender_id() != PUS_MODE_SERVICE.id() {
+            log::warn!(
+                "can not send back mode reply to sender {}",
+                requestor.sender_id()
+            );
+        }
+        self.mode_interface
+            .reply_to_pus_tx
+            .send(GenericMessage::new(requestor, reply))
+            .map_err(|_| GenericTargetedMessagingError::Send(GenericSendError::RxDisconnected))?;
+        Ok(())
+    }
+
+    fn handle_mode_info(
+        &mut self,
+        _requestor_info: MessageMetadata,
+        _info: ModeAndSubmode,
+    ) -> Result<(), Self::Error> {
+        Ok(())
+    }
+}

satrs-example/src/hk.rs

@@ -1,7 +1,9 @@
 use derive_new::new;
 use satrs::hk::UniqueId;
 use satrs::request::UniqueApidTargetId;
-use satrs::spacepackets::ByteConversionError;
+use satrs::spacepackets::ecss::hk;
+use satrs::spacepackets::ecss::tm::{PusTmCreator, PusTmSecondaryHeader};
+use satrs::spacepackets::{ByteConversionError, SpHeader};
 
 #[derive(Debug, new, Copy, Clone)]
 pub struct HkUniqueId {
@@ -33,3 +35,35 @@ impl HkUniqueId {
         Ok(8)
     }
 }
+
+#[derive(new)]
+pub struct PusHkHelper {
+    component_id: UniqueApidTargetId,
+}
+
+impl PusHkHelper {
+    pub fn generate_hk_report_packet<
+        'a,
+        'b,
+        HkWriter: FnMut(&mut [u8]) -> Result<usize, ByteConversionError>,
+    >(
+        &self,
+        timestamp: &'a [u8],
+        set_id: u32,
+        hk_data_writer: &mut HkWriter,
+        buf: &'b mut [u8],
+    ) -> Result<PusTmCreator<'a, 'b>, ByteConversionError> {
+        let sec_header =
+            PusTmSecondaryHeader::new(3, hk::Subservice::TmHkPacket as u8, 0, 0, timestamp);
+        buf[0..4].copy_from_slice(&self.component_id.unique_id.to_be_bytes());
+        buf[4..8].copy_from_slice(&set_id.to_be_bytes());
+        let (_, second_half) = buf.split_at_mut(8);
+        let hk_data_len = hk_data_writer(second_half)?;
+        Ok(PusTmCreator::new(
+            SpHeader::new_from_apid(self.component_id.apid),
+            sec_header,
+            &buf[0..8 + hk_data_len],
+            true,
+        ))
+    }
+}

satrs-example/src/interface/mod.rs

@@ -1,3 +1,4 @@
 //! This module contains all component related to the direct interface of the example.
+pub mod sim_client_udp;
 pub mod tcp;
 pub mod udp;

satrs-example/src/interface/sim_client_udp.rs

@@ -0,0 +1,420 @@
+use std::{
+    collections::HashMap,
+    net::{Ipv4Addr, SocketAddr, SocketAddrV4, UdpSocket},
+    sync::mpsc,
+    time::Duration,
+};
+
+use satrs::pus::HandlingStatus;
+use satrs_minisim::{
+    udp::SIM_CTRL_PORT, SerializableSimMsgPayload, SimComponent, SimMessageProvider, SimReply,
+    SimRequest,
+};
+use satrs_minisim::{SimCtrlReply, SimCtrlRequest};
+
+struct SimReplyMap(pub HashMap<SimComponent, mpsc::Sender<SimReply>>);
+
+pub fn create_sim_client(sim_request_rx: mpsc::Receiver<SimRequest>) -> Option<SimClientUdp> {
+    match SimClientUdp::new(
+        SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::LOCALHOST, SIM_CTRL_PORT)),
+        sim_request_rx,
+    ) {
+        Ok(sim_client) => {
+            log::info!("simulator client connection success");
+            return Some(sim_client);
+        }
+        Err(e) => {
+            log::warn!("sim client creation error: {}", e);
+        }
+    }
+    None
+}
+
+#[derive(thiserror::Error, Debug)]
+pub enum SimClientCreationError {
+    #[error("io error: {0}")]
+    Io(#[from] std::io::Error),
+    #[error("timeout when trying to connect to sim UDP server")]
+    Timeout,
+    #[error("invalid ping reply when trying connection to UDP sim server")]
+    InvalidReplyJsonError(#[from] serde_json::Error),
+    #[error("invalid sim reply, not pong reply as expected: {0:?}")]
+    ReplyIsNotPong(SimReply),
+}
+
+pub struct SimClientUdp {
+    udp_client: UdpSocket,
+    simulator_addr: SocketAddr,
+    sim_request_rx: mpsc::Receiver<SimRequest>,
+    reply_map: SimReplyMap,
+    reply_buf: [u8; 4096],
+}
+
+impl SimClientUdp {
+    pub fn new(
+        simulator_addr: SocketAddr,
+        sim_request_rx: mpsc::Receiver<SimRequest>,
+    ) -> Result<Self, SimClientCreationError> {
+        let mut reply_buf: [u8; 4096] = [0; 4096];
+        let mut udp_client = UdpSocket::bind("127.0.0.1:0")?;
+        udp_client.set_read_timeout(Some(Duration::from_millis(100)))?;
+        Self::attempt_connection(&mut udp_client, simulator_addr, &mut reply_buf)?;
+        udp_client.set_nonblocking(true)?;
+        Ok(Self {
+            udp_client,
+            simulator_addr,
+            sim_request_rx,
+            reply_map: SimReplyMap(HashMap::new()),
+            reply_buf,
+        })
+    }
+
+    pub fn attempt_connection(
+        udp_client: &mut UdpSocket,
+        simulator_addr: SocketAddr,
+        reply_buf: &mut [u8],
+    ) -> Result<(), SimClientCreationError> {
+        let sim_req = SimRequest::new_with_epoch_time(SimCtrlRequest::Ping);
+        let sim_req_json = serde_json::to_string(&sim_req).expect("failed to serialize SimRequest");
+        udp_client.send_to(sim_req_json.as_bytes(), simulator_addr)?;
+        match udp_client.recv(reply_buf) {
+            Ok(reply_len) => {
+                let sim_reply: SimReply = serde_json::from_slice(&reply_buf[0..reply_len])?;
+                if sim_reply.component() != SimComponent::SimCtrl {
+                    return Err(SimClientCreationError::ReplyIsNotPong(sim_reply));
+                }
+                let sim_ctrl_reply =
+                    SimCtrlReply::from_sim_message(&sim_reply).expect("invalid SIM reply");
+                match sim_ctrl_reply {
+                    SimCtrlReply::InvalidRequest(_) => {
+                        panic!("received invalid request reply from UDP sim server")
+                    }
+                    SimCtrlReply::Pong => Ok(()),
+                }
+            }
+            Err(e) => {
+                if e.kind() == std::io::ErrorKind::TimedOut
+                    || e.kind() == std::io::ErrorKind::WouldBlock
+                {
+                    Err(SimClientCreationError::Timeout)
+                } else {
+                    Err(SimClientCreationError::Io(e))
+                }
+            }
+        }
+    }
+
+    pub fn operation(&mut self) -> HandlingStatus {
+        let mut no_sim_requests_handled = true;
+        let mut no_data_from_udp_server_received = true;
+        loop {
+            match self.sim_request_rx.try_recv() {
+                Ok(request) => {
+                    let request_json =
+                        serde_json::to_string(&request).expect("failed to serialize SimRequest");
+                    if let Err(e) = self
+                        .udp_client
+                        .send_to(request_json.as_bytes(), self.simulator_addr)
+                    {
+                        log::error!("error sending data to UDP SIM server: {}", e);
+                        break;
+                    } else {
+                        no_sim_requests_handled = false;
+                    }
+                }
+                Err(e) => match e {
+                    mpsc::TryRecvError::Empty => {
+                        break;
+                    }
+                    mpsc::TryRecvError::Disconnected => {
+                        log::warn!("SIM request sender disconnected");
+                        break;
+                    }
+                },
+            }
+        }
+        loop {
+            match self.udp_client.recv(&mut self.reply_buf) {
+                Ok(recvd_bytes) => {
+                    no_data_from_udp_server_received = false;
+                    let sim_reply_result: serde_json::Result<SimReply> =
+                        serde_json::from_slice(&self.reply_buf[0..recvd_bytes]);
+                    match sim_reply_result {
+                        Ok(sim_reply) => {
+                            if let Some(sender) = self.reply_map.0.get(&sim_reply.component()) {
+                                sender.send(sim_reply).expect("failed to send SIM reply");
+                            } else {
+                                log::warn!(
+                                    "no recipient for SIM reply from component {:?}",
+                                    sim_reply.component()
+                                );
+                            }
+                        }
+                        Err(e) => {
+                            log::warn!("failed to deserialize SIM reply: {}", e);
+                        }
+                    }
+                }
+                Err(e) => {
+                    if e.kind() == std::io::ErrorKind::WouldBlock
+                        || e.kind() == std::io::ErrorKind::TimedOut
+                    {
+                        break;
+                    }
+                    log::error!("error receiving data from UDP SIM server: {}", e);
+                    break;
+                }
+            }
+        }
+        if no_sim_requests_handled && no_data_from_udp_server_received {
+            return HandlingStatus::Empty;
+        }
+        HandlingStatus::HandledOne
+    }
+
+    pub fn add_reply_recipient(
+        &mut self,
+        component: SimComponent,
+        reply_sender: mpsc::Sender<SimReply>,
+    ) {
+        self.reply_map.0.insert(component, reply_sender);
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+    use std::{
+        collections::HashMap,
+        net::{SocketAddr, UdpSocket},
+        sync::{
+            atomic::{AtomicBool, Ordering},
+            mpsc, Arc,
+        },
+        time::Duration,
+    };
+
+    use satrs_minisim::{
+        eps::{PcduReply, PcduRequest},
+        SerializableSimMsgPayload, SimComponent, SimCtrlReply, SimCtrlRequest, SimMessageProvider,
+        SimReply, SimRequest,
+    };
+
+    use super::SimClientUdp;
+
+    struct UdpSimTestServer {
+        udp_server: UdpSocket,
+        request_tx: mpsc::Sender<SimRequest>,
+        reply_rx: mpsc::Receiver<SimReply>,
+        last_sender: Option<SocketAddr>,
+        stop_signal: Arc<AtomicBool>,
+        recv_buf: [u8; 1024],
+    }
+
+    impl UdpSimTestServer {
+        pub fn new(
+            request_tx: mpsc::Sender<SimRequest>,
+            reply_rx: mpsc::Receiver<SimReply>,
+            stop_signal: Arc<AtomicBool>,
+        ) -> Self {
+            let udp_server = UdpSocket::bind("127.0.0.1:0").expect("creating UDP server failed");
+            udp_server
+                .set_nonblocking(true)
+                .expect("failed to set UDP server to non-blocking");
+            Self {
+                udp_server,
+                request_tx,
+                reply_rx,
+                last_sender: None,
+                stop_signal,
+                recv_buf: [0; 1024],
+            }
+        }
+
+        pub fn operation(&mut self) {
+            loop {
+                let mut no_sim_replies_handled = true;
+                let mut no_data_received = true;
+                if self.stop_signal.load(Ordering::Relaxed) {
+                    break;
+                }
+                if let Some(last_sender) = self.last_sender {
+                    loop {
+                        match self.reply_rx.try_recv() {
+                            Ok(sim_reply) => {
+                                let sim_reply_json = serde_json::to_string(&sim_reply)
+                                    .expect("failed to serialize SimReply");
+                                self.udp_server
+                                    .send_to(sim_reply_json.as_bytes(), last_sender)
+                                    .expect("failed to send reply to client from UDP server");
+                                no_sim_replies_handled = false;
+                            }
+                            Err(e) => match e {
+                                mpsc::TryRecvError::Empty => break,
+                                mpsc::TryRecvError::Disconnected => {
+                                    panic!("reply sender disconnected")
+                                }
+                            },
+                        }
+                    }
+                }
+
+                loop {
+                    match self.udp_server.recv_from(&mut self.recv_buf) {
+                        Ok((read_bytes, from)) => {
+                            let sim_request: SimRequest =
+                                serde_json::from_slice(&self.recv_buf[0..read_bytes])
+                                    .expect("failed to deserialize SimRequest");
+                            if sim_request.component() == SimComponent::SimCtrl {
+                                // For a ping, we perform the reply handling here directly
+                                let sim_ctrl_request =
+                                    SimCtrlRequest::from_sim_message(&sim_request)
+                                        .expect("failed to convert SimRequest to SimCtrlRequest");
+                                match sim_ctrl_request {
+                                    SimCtrlRequest::Ping => {
+                                        no_data_received = false;
+                                        self.last_sender = Some(from);
+                                        let sim_reply = SimReply::new(&SimCtrlReply::Pong);
+                                        let sim_reply_json = serde_json::to_string(&sim_reply)
+                                            .expect("failed to serialize SimReply");
+                                        self.udp_server
+                                            .send_to(sim_reply_json.as_bytes(), from)
+                                            .expect(
+                                                "failed to send reply to client from UDP server",
+                                            );
+                                    }
+                                };
+                            }
+                            // Forward each SIM request for testing purposes.
+                            self.request_tx
+                                .send(sim_request)
+                                .expect("failed to send request");
+                        }
+                        Err(e) => {
+                            if e.kind() != std::io::ErrorKind::WouldBlock
+                                && e.kind() != std::io::ErrorKind::TimedOut
+                            {
+                                panic!("UDP server error: {}", e);
+                            }
+                            break;
+                        }
+                    }
+                }
+                if no_sim_replies_handled && no_data_received {
+                    std::thread::sleep(Duration::from_millis(5));
+                }
+            }
+        }
+
+        pub fn local_addr(&self) -> SocketAddr {
+            self.udp_server.local_addr().unwrap()
+        }
+    }
+
+    #[test]
+    fn basic_connection_test() {
+        let (server_sim_request_tx, server_sim_request_rx) = mpsc::channel();
+        let (_server_sim_reply_tx, server_sim_reply_rx) = mpsc::channel();
+        let stop_signal = Arc::new(AtomicBool::new(false));
+        let mut udp_server = UdpSimTestServer::new(
+            server_sim_request_tx,
+            server_sim_reply_rx,
+            stop_signal.clone(),
+        );
+        let server_addr = udp_server.local_addr();
+        let (_client_sim_req_tx, client_sim_req_rx) = mpsc::channel();
+        // Need to spawn the simulator UDP server before calling the client constructor.
+        let jh0 = std::thread::spawn(move || {
+            udp_server.operation();
+        });
+        // Creating the client also performs the connection test.
+        SimClientUdp::new(server_addr, client_sim_req_rx).unwrap();
+        let sim_request = server_sim_request_rx
+            .recv_timeout(Duration::from_millis(50))
+            .expect("no SIM request received");
+        let ping_request = SimCtrlRequest::from_sim_message(&sim_request)
+            .expect("failed to create SimCtrlRequest");
+        assert_eq!(ping_request, SimCtrlRequest::Ping);
+        // Stop the server.
+        stop_signal.store(true, Ordering::Relaxed);
+        jh0.join().unwrap();
+    }
+
+    #[test]
+    fn basic_request_reply_test() {
+        let (server_sim_request_tx, server_sim_request_rx) = mpsc::channel();
+        let (server_sim_reply_tx, sever_sim_reply_rx) = mpsc::channel();
+        let stop_signal = Arc::new(AtomicBool::new(false));
+        let mut udp_server = UdpSimTestServer::new(
+            server_sim_request_tx,
+            sever_sim_reply_rx,
+            stop_signal.clone(),
+        );
+        let server_addr = udp_server.local_addr();
+        let (client_sim_req_tx, client_sim_req_rx) = mpsc::channel();
+        let (client_pcdu_reply_tx, client_pcdu_reply_rx) = mpsc::channel();
+        // Need to spawn the simulator UDP server before calling the client constructor.
+        let jh0 = std::thread::spawn(move || {
+            udp_server.operation();
+        });
+
+        // Creating the client also performs the connection test.
+        let mut client = SimClientUdp::new(server_addr, client_sim_req_rx).unwrap();
+        client.add_reply_recipient(SimComponent::Pcdu, client_pcdu_reply_tx);
+
+        let sim_request = server_sim_request_rx
+            .recv_timeout(Duration::from_millis(50))
+            .expect("no SIM request received");
+        let ping_request = SimCtrlRequest::from_sim_message(&sim_request)
+            .expect("failed to create SimCtrlRequest");
+        assert_eq!(ping_request, SimCtrlRequest::Ping);
+
+        let pcdu_req = PcduRequest::RequestSwitchInfo;
+        client_sim_req_tx
+            .send(SimRequest::new_with_epoch_time(pcdu_req))
+            .expect("send failed");
+        client.operation();
+
+        // Check that the request arrives properly at the server.
+        let sim_request = server_sim_request_rx
+            .recv_timeout(Duration::from_millis(50))
+            .expect("no SIM request received");
+        let req_recvd_on_server =
+            PcduRequest::from_sim_message(&sim_request).expect("failed to create SimCtrlRequest");
+        matches!(req_recvd_on_server, PcduRequest::RequestSwitchInfo);
+
+        // We inject the reply ourselves.
+        let pcdu_reply = PcduReply::SwitchInfo(HashMap::new());
+        server_sim_reply_tx
+            .send(SimReply::new(&pcdu_reply))
+            .expect("sending PCDU reply failed");
+
+        // Now we verify that the reply is sent by the UDP server back to the client, and then
+        // forwarded by the clients internal map.
+        let mut pcdu_reply_received = false;
+        for _ in 0..3 {
+            client.operation();
+
+            match client_pcdu_reply_rx.try_recv() {
+                Ok(sim_reply) => {
+                    assert_eq!(sim_reply.component(), SimComponent::Pcdu);
+                    let pcdu_reply_from_client = PcduReply::from_sim_message(&sim_reply)
+                        .expect("failed to create PcduReply");
+                    assert_eq!(pcdu_reply_from_client, pcdu_reply);
+                    pcdu_reply_received = true;
+                    break;
+                }
+                Err(e) => match e {
+                    mpsc::TryRecvError::Empty => std::thread::sleep(Duration::from_millis(10)),
+                    mpsc::TryRecvError::Disconnected => panic!("reply sender disconnected"),
+                },
+            }
+        }
+        if !pcdu_reply_received {
+            panic!("no reply received");
+        }
+
+        // Stop the server.
+        stop_signal.store(true, Ordering::Relaxed);
+        jh0.join().unwrap();
+    }
+}

satrs-example/src/lib.rs

@@ -9,12 +9,12 @@ pub enum DeviceMode {
     Normal = 2,
 }
 
-pub struct TimeStampHelper {
+pub struct TimestampHelper {
     stamper: CdsTime,
     time_stamp: [u8; 7],
 }
 
-impl TimeStampHelper {
+impl TimestampHelper {
     pub fn stamp(&self) -> &[u8] {
         &self.time_stamp
     }
@@ -29,7 +29,7 @@ impl TimeStampHelper {
     }
 }
 
-impl Default for TimeStampHelper {
+impl Default for TimestampHelper {
     fn default() -> Self {
         Self {
             stamper: CdsTime::now_with_u16_days().expect("creating time stamper failed"),

satrs-example/src/main.rs

@@ -1,4 +1,5 @@
 mod acs;
+mod eps;
 mod events;
 mod hk;
 mod interface;
@@ -7,6 +8,10 @@ mod pus;
 mod requests;
 mod tmtc;
 
+use crate::eps::pcdu::{
+    PcduHandler, SerialInterfaceDummy, SerialInterfaceToSim, SerialSimInterfaceWrapper,
+};
+use crate::eps::PowerSwitchHelper;
 use crate::events::EventHandler;
 use crate::interface::udp::DynamicUdpTmHandler;
 use crate::pus::stack::PusStack;
@@ -16,15 +21,20 @@ use log::info;
 use pus::test::create_test_service_dynamic;
 use satrs::hal::std::tcp_server::ServerConfig;
 use satrs::hal::std::udp_server::UdpTcServer;
+use satrs::pus::HandlingStatus;
 use satrs::request::GenericMessage;
 use satrs::tmtc::{PacketSenderWithSharedPool, SharedPacketPool};
 use satrs_example::config::pool::{create_sched_tc_pool, create_static_pools};
 use satrs_example::config::tasks::{
-    FREQ_MS_AOCS, FREQ_MS_EVENT_HANDLING, FREQ_MS_PUS_STACK, FREQ_MS_UDP_TMTC,
+    FREQ_MS_AOCS, FREQ_MS_PUS_STACK, FREQ_MS_UDP_TMTC, SIM_CLIENT_IDLE_DELAY_MS,
 };
 use satrs_example::config::{OBSW_SERVER_ADDR, PACKET_ID_VALIDATOR, SERVER_PORT};
 
-use crate::acs::mgm::{MgmHandlerLis3Mdl, MpscModeLeafInterface, SpiDummyInterface};
+use crate::acs::mgm::{
+    MgmHandlerLis3Mdl, MpscModeLeafInterface, SpiDummyInterface, SpiSimInterface,
+    SpiSimInterfaceWrapper,
+};
+use crate::interface::sim_client_udp::create_sim_client;
 use crate::interface::tcp::{SyncTcpTmSource, TcpTask};
 use crate::interface::udp::{StaticUdpTmHandler, UdpTmtcServer};
 use crate::logger::setup_logger;
@@ -39,9 +49,9 @@ use crate::requests::{CompositeRequest, GenericRequestRouter};
 use satrs::mode::ModeRequest;
 use satrs::pus::event_man::EventRequestWithToken;
 use satrs::spacepackets::{time::cds::CdsTime, time::TimeWriter};
-use satrs_example::config::components::{MGM_HANDLER_0, TCP_SERVER, UDP_SERVER};
+use satrs_example::config::components::{MGM_HANDLER_0, PCDU_HANDLER, TCP_SERVER, UDP_SERVER};
 use std::net::{IpAddr, SocketAddr};
-use std::sync::mpsc;
+use std::sync::{mpsc, Mutex};
 use std::sync::{Arc, RwLock};
 use std::thread;
 use std::time::Duration;
@@ -60,9 +70,20 @@ fn static_tmtc_pool_main() {
     let tm_sink_tx_sender =
         PacketSenderWithSharedPool::new(tm_sink_tx.clone(), shared_tm_pool_wrapper.clone());
 
+    let (sim_request_tx, sim_request_rx) = mpsc::channel();
+    let (mgm_sim_reply_tx, mgm_sim_reply_rx) = mpsc::channel();
+    let (pcdu_sim_reply_tx, pcdu_sim_reply_rx) = mpsc::channel();
+    let mut opt_sim_client = create_sim_client(sim_request_rx);
+
     let (mgm_handler_composite_tx, mgm_handler_composite_rx) =
-        mpsc::channel::<GenericMessage<CompositeRequest>>();
+        mpsc::sync_channel::<GenericMessage<CompositeRequest>>(10);
-    let (mgm_handler_mode_tx, mgm_handler_mode_rx) = mpsc::channel::<GenericMessage<ModeRequest>>();
+    let (pcdu_handler_composite_tx, pcdu_handler_composite_rx) =
+        mpsc::sync_channel::<GenericMessage<CompositeRequest>>(30);
+
+    let (mgm_handler_mode_tx, mgm_handler_mode_rx) =
+        mpsc::sync_channel::<GenericMessage<ModeRequest>>(5);
+    let (pcdu_handler_mode_tx, pcdu_handler_mode_rx) =
+        mpsc::sync_channel::<GenericMessage<ModeRequest>>(5);
 
     // Some request are targetable. This map is used to retrieve sender handles based on a target ID.
     let mut request_map = GenericRequestRouter::default();
@@ -72,6 +93,12 @@ fn static_tmtc_pool_main() {
     request_map
         .mode_router_map
         .insert(MGM_HANDLER_0.id(), mgm_handler_mode_tx);
+    request_map
+        .composite_router_map
+        .insert(PCDU_HANDLER.id(), pcdu_handler_composite_tx);
+    request_map
+        .mode_router_map
+        .insert(PCDU_HANDLER.id(), pcdu_handler_mode_tx);
 
     // This helper structure is used by all telecommand providers which need to send telecommands
     // to the TC source.
@@ -195,26 +222,68 @@ fn static_tmtc_pool_main() {
     );
 
     let (mgm_handler_mode_reply_to_parent_tx, _mgm_handler_mode_reply_to_parent_rx) =
-        mpsc::channel();
+        mpsc::sync_channel(5);
+
+    let shared_switch_set = Arc::new(Mutex::default());
+    let (switch_request_tx, switch_request_rx) = mpsc::sync_channel(20);
+    let switch_helper = PowerSwitchHelper::new(switch_request_tx, shared_switch_set.clone());
 
-    let dummy_spi_interface = SpiDummyInterface::default();
     let shared_mgm_set = Arc::default();
-    let mode_leaf_interface = MpscModeLeafInterface {
+    let mgm_mode_leaf_interface = MpscModeLeafInterface {
         request_rx: mgm_handler_mode_rx,
-        reply_tx_to_pus: pus_mode_reply_tx,
+        reply_to_pus_tx: pus_mode_reply_tx.clone(),
-        reply_tx_to_parent: mgm_handler_mode_reply_to_parent_tx,
+        reply_to_parent_tx: mgm_handler_mode_reply_to_parent_tx,
+    };
+
+    let mgm_spi_interface = if let Some(sim_client) = opt_sim_client.as_mut() {
+        sim_client.add_reply_recipient(satrs_minisim::SimComponent::MgmLis3Mdl, mgm_sim_reply_tx);
+        SpiSimInterfaceWrapper::Sim(SpiSimInterface {
+            sim_request_tx: sim_request_tx.clone(),
+            sim_reply_rx: mgm_sim_reply_rx,
+        })
+    } else {
+        SpiSimInterfaceWrapper::Dummy(SpiDummyInterface::default())
     };
     let mut mgm_handler = MgmHandlerLis3Mdl::new(
         MGM_HANDLER_0,
         "MGM_0",
-        mode_leaf_interface,
+        mgm_mode_leaf_interface,
         mgm_handler_composite_rx,
-        pus_hk_reply_tx,
+        pus_hk_reply_tx.clone(),
-        tm_sink_tx,
+        switch_helper.clone(),
-        dummy_spi_interface,
+        tm_sink_tx.clone(),
+        mgm_spi_interface,
         shared_mgm_set,
     );
 
+    let (pcdu_handler_mode_reply_to_parent_tx, _pcdu_handler_mode_reply_to_parent_rx) =
+        mpsc::sync_channel(10);
+    let pcdu_mode_leaf_interface = MpscModeLeafInterface {
+        request_rx: pcdu_handler_mode_rx,
+        reply_to_pus_tx: pus_mode_reply_tx,
+        reply_to_parent_tx: pcdu_handler_mode_reply_to_parent_tx,
+    };
+    let pcdu_serial_interface = if let Some(sim_client) = opt_sim_client.as_mut() {
+        sim_client.add_reply_recipient(satrs_minisim::SimComponent::Pcdu, pcdu_sim_reply_tx);
+        SerialSimInterfaceWrapper::Sim(SerialInterfaceToSim::new(
+            sim_request_tx.clone(),
+            pcdu_sim_reply_rx,
+        ))
+    } else {
+        SerialSimInterfaceWrapper::Dummy(SerialInterfaceDummy::default())
+    };
+    let mut pcdu_handler = PcduHandler::new(
+        PCDU_HANDLER,
+        "PCDU",
+        pcdu_mode_leaf_interface,
+        pcdu_handler_composite_rx,
+        pus_hk_reply_tx,
+        switch_request_rx,
+        tm_sink_tx,
+        pcdu_serial_interface,
+        shared_switch_set,
+    );
+
     info!("Starting TMTC and UDP task");
     let jh_udp_tmtc = thread::Builder::new()
         .name("SATRS tmtc-udp".to_string())
@@ -247,14 +316,20 @@ fn static_tmtc_pool_main() {
         })
         .unwrap();
 
-    info!("Starting event handling task");
+    let mut opt_jh_sim_client = None;
-    let jh_event_handling = thread::Builder::new()
+    if let Some(mut sim_client) = opt_sim_client {
-        .name("sat-rs events".to_string())
+        info!("Starting UDP sim client task");
-        .spawn(move || loop {
+        opt_jh_sim_client = Some(
-            event_handler.periodic_operation();
+            thread::Builder::new()
-            thread::sleep(Duration::from_millis(FREQ_MS_EVENT_HANDLING));
+                .name("sat-rs sim adapter".to_string())
-        })
+                .spawn(move || loop {
-        .unwrap();
+                    if sim_client.operation() == HandlingStatus::Empty {
+                        std::thread::sleep(Duration::from_millis(SIM_CLIENT_IDLE_DELAY_MS));
+                    }
+                })
+                .unwrap(),
+        );
+    }
 
     info!("Starting AOCS thread");
     let jh_aocs = thread::Builder::new()
@@ -265,10 +340,26 @@ fn static_tmtc_pool_main() {
         })
         .unwrap();
 
+    info!("Starting EPS thread");
+    let jh_eps = thread::Builder::new()
+        .name("sat-rs eps".to_string())
+        .spawn(move || loop {
+            // TODO: We should introduce something like a fixed timeslot helper to allow a more
+            // declarative API. It would also be very useful for the AOCS task.
+            pcdu_handler.periodic_operation(eps::pcdu::OpCode::RegularOp);
+            thread::sleep(Duration::from_millis(50));
+            pcdu_handler.periodic_operation(eps::pcdu::OpCode::PollAndRecvReplies);
+            thread::sleep(Duration::from_millis(50));
+            pcdu_handler.periodic_operation(eps::pcdu::OpCode::PollAndRecvReplies);
+            thread::sleep(Duration::from_millis(300));
+        })
+        .unwrap();
+
     info!("Starting PUS handler thread");
     let jh_pus_handler = thread::Builder::new()
         .name("sat-rs pus".to_string())
         .spawn(move || loop {
+            event_handler.periodic_operation();
             pus_stack.periodic_operation();
             thread::sleep(Duration::from_millis(FREQ_MS_PUS_STACK));
         })
@@ -283,10 +374,13 @@ fn static_tmtc_pool_main() {
     jh_tm_funnel
         .join()
         .expect("Joining TM Funnel thread failed");
-    jh_event_handling
+    if let Some(jh_sim_client) = opt_jh_sim_client {
-        .join()
+        jh_sim_client
-        .expect("Joining Event Manager thread failed");
+            .join()
+            .expect("Joining SIM client thread failed");
+    }
     jh_aocs.join().expect("Joining AOCS thread failed");
+    jh_eps.join().expect("Joining EPS thread failed");
     jh_pus_handler
         .join()
         .expect("Joining PUS handler thread failed");
@@ -295,22 +389,38 @@ fn static_tmtc_pool_main() {
 #[allow(dead_code)]
 fn dyn_tmtc_pool_main() {
     let (tc_source_tx, tc_source_rx) = mpsc::channel();
-    let (tm_funnel_tx, tm_funnel_rx) = mpsc::channel();
+    let (tm_sink_tx, tm_sink_rx) = mpsc::channel();
     let (tm_server_tx, tm_server_rx) = mpsc::channel();
 
+    let (sim_request_tx, sim_request_rx) = mpsc::channel();
+    let (mgm_sim_reply_tx, mgm_sim_reply_rx) = mpsc::channel();
+    let (pcdu_sim_reply_tx, pcdu_sim_reply_rx) = mpsc::channel();
+    let mut opt_sim_client = create_sim_client(sim_request_rx);
+
     // Some request are targetable. This map is used to retrieve sender handles based on a target ID.
     let (mgm_handler_composite_tx, mgm_handler_composite_rx) =
-        mpsc::channel::<GenericMessage<CompositeRequest>>();
+        mpsc::sync_channel::<GenericMessage<CompositeRequest>>(5);
-    let (mgm_handler_mode_tx, mgm_handler_mode_rx) = mpsc::channel::<GenericMessage<ModeRequest>>();
+    let (pcdu_handler_composite_tx, pcdu_handler_composite_rx) =
+        mpsc::sync_channel::<GenericMessage<CompositeRequest>>(10);
+    let (mgm_handler_mode_tx, mgm_handler_mode_rx) =
+        mpsc::sync_channel::<GenericMessage<ModeRequest>>(5);
+    let (pcdu_handler_mode_tx, pcdu_handler_mode_rx) =
+        mpsc::sync_channel::<GenericMessage<ModeRequest>>(10);
 
     // Some request are targetable. This map is used to retrieve sender handles based on a target ID.
     let mut request_map = GenericRequestRouter::default();
     request_map
         .composite_router_map
-        .insert(MGM_HANDLER_0.raw(), mgm_handler_composite_tx);
+        .insert(MGM_HANDLER_0.id(), mgm_handler_composite_tx);
     request_map
         .mode_router_map
-        .insert(MGM_HANDLER_0.raw(), mgm_handler_mode_tx);
+        .insert(MGM_HANDLER_0.id(), mgm_handler_mode_tx);
+    request_map
+        .composite_router_map
+        .insert(PCDU_HANDLER.id(), pcdu_handler_composite_tx);
+    request_map
+        .mode_router_map
+        .insert(PCDU_HANDLER.id(), pcdu_handler_mode_tx);
 
     // Create event handling components
     // These sender handles are used to send event requests, for example to enable or disable
@@ -319,7 +429,7 @@ fn dyn_tmtc_pool_main() {
     let (event_request_tx, event_request_rx) = mpsc::channel::<EventRequestWithToken>();
     // The event task is the core handler to perform the event routing and TM handling as specified
     // in the sat-rs documentation.
-    let mut event_handler = EventHandler::new(tm_funnel_tx.clone(), event_rx, event_request_rx);
+    let mut event_handler = EventHandler::new(tm_sink_tx.clone(), event_rx, event_request_rx);
 
     let (pus_test_tx, pus_test_rx) = mpsc::channel();
     let (pus_event_tx, pus_event_rx) = mpsc::channel();
@@ -342,30 +452,30 @@ fn dyn_tmtc_pool_main() {
     };
 
     let pus_test_service =
-        create_test_service_dynamic(tm_funnel_tx.clone(), event_tx.clone(), pus_test_rx);
+        create_test_service_dynamic(tm_sink_tx.clone(), event_tx.clone(), pus_test_rx);
     let pus_scheduler_service = create_scheduler_service_dynamic(
-        tm_funnel_tx.clone(),
+        tm_sink_tx.clone(),
         tc_source_tx.clone(),
         pus_sched_rx,
         create_sched_tc_pool(),
     );
 
     let pus_event_service =
-        create_event_service_dynamic(tm_funnel_tx.clone(), pus_event_rx, event_request_tx);
+        create_event_service_dynamic(tm_sink_tx.clone(), pus_event_rx, event_request_tx);
     let pus_action_service = create_action_service_dynamic(
-        tm_funnel_tx.clone(),
+        tm_sink_tx.clone(),
         pus_action_rx,
         request_map.clone(),
         pus_action_reply_rx,
     );
     let pus_hk_service = create_hk_service_dynamic(
-        tm_funnel_tx.clone(),
+        tm_sink_tx.clone(),
         pus_hk_rx,
         request_map.clone(),
         pus_hk_reply_rx,
     );
     let pus_mode_service = create_mode_service_dynamic(
-        tm_funnel_tx.clone(),
+        tm_sink_tx.clone(),
         pus_mode_rx,
         request_map,
         pus_mode_reply_rx,
@@ -381,7 +491,7 @@ fn dyn_tmtc_pool_main() {
 
     let mut tmtc_task = TcSourceTaskDynamic::new(
         tc_source_rx,
-        PusTcDistributor::new(tm_funnel_tx.clone(), pus_router),
+        PusTcDistributor::new(tm_sink_tx.clone(), pus_router),
     );
 
     let sock_addr = SocketAddr::new(IpAddr::V4(OBSW_SERVER_ADDR), SERVER_PORT);
@@ -410,28 +520,70 @@ fn dyn_tmtc_pool_main() {
     )
     .expect("tcp server creation failed");
 
-    let mut tm_funnel = TmSinkDynamic::new(sync_tm_tcp_source, tm_funnel_rx, tm_server_tx);
+    let mut tm_funnel = TmSinkDynamic::new(sync_tm_tcp_source, tm_sink_rx, tm_server_tx);
+
+    let shared_switch_set = Arc::new(Mutex::default());
+    let (switch_request_tx, switch_request_rx) = mpsc::sync_channel(20);
+    let switch_helper = PowerSwitchHelper::new(switch_request_tx, shared_switch_set.clone());
 
     let (mgm_handler_mode_reply_to_parent_tx, _mgm_handler_mode_reply_to_parent_rx) =
-        mpsc::channel();
+        mpsc::sync_channel(5);
-    let dummy_spi_interface = SpiDummyInterface::default();
     let shared_mgm_set = Arc::default();
     let mode_leaf_interface = MpscModeLeafInterface {
         request_rx: mgm_handler_mode_rx,
-        reply_tx_to_pus: pus_mode_reply_tx,
+        reply_to_pus_tx: pus_mode_reply_tx.clone(),
-        reply_tx_to_parent: mgm_handler_mode_reply_to_parent_tx,
+        reply_to_parent_tx: mgm_handler_mode_reply_to_parent_tx,
+    };
+
+    let mgm_spi_interface = if let Some(sim_client) = opt_sim_client.as_mut() {
+        sim_client.add_reply_recipient(satrs_minisim::SimComponent::MgmLis3Mdl, mgm_sim_reply_tx);
+        SpiSimInterfaceWrapper::Sim(SpiSimInterface {
+            sim_request_tx: sim_request_tx.clone(),
+            sim_reply_rx: mgm_sim_reply_rx,
+        })
+    } else {
+        SpiSimInterfaceWrapper::Dummy(SpiDummyInterface::default())
     };
     let mut mgm_handler = MgmHandlerLis3Mdl::new(
         MGM_HANDLER_0,
         "MGM_0",
         mode_leaf_interface,
         mgm_handler_composite_rx,
-        pus_hk_reply_tx,
+        pus_hk_reply_tx.clone(),
-        tm_funnel_tx,
+        switch_helper.clone(),
-        dummy_spi_interface,
+        tm_sink_tx.clone(),
+        mgm_spi_interface,
         shared_mgm_set,
     );
 
+    let (pcdu_handler_mode_reply_to_parent_tx, _pcdu_handler_mode_reply_to_parent_rx) =
+        mpsc::sync_channel(10);
+    let pcdu_mode_leaf_interface = MpscModeLeafInterface {
+        request_rx: pcdu_handler_mode_rx,
+        reply_to_pus_tx: pus_mode_reply_tx,
+        reply_to_parent_tx: pcdu_handler_mode_reply_to_parent_tx,
+    };
+    let pcdu_serial_interface = if let Some(sim_client) = opt_sim_client.as_mut() {
+        sim_client.add_reply_recipient(satrs_minisim::SimComponent::Pcdu, pcdu_sim_reply_tx);
+        SerialSimInterfaceWrapper::Sim(SerialInterfaceToSim::new(
+            sim_request_tx.clone(),
+            pcdu_sim_reply_rx,
+        ))
+    } else {
+        SerialSimInterfaceWrapper::Dummy(SerialInterfaceDummy::default())
+    };
+    let mut pcdu_handler = PcduHandler::new(
+        PCDU_HANDLER,
+        "PCDU",
+        pcdu_mode_leaf_interface,
+        pcdu_handler_composite_rx,
+        pus_hk_reply_tx,
+        switch_request_rx,
+        tm_sink_tx,
+        pcdu_serial_interface,
+        shared_switch_set,
+    );
+
     info!("Starting TMTC and UDP task");
     let jh_udp_tmtc = thread::Builder::new()
         .name("sat-rs tmtc-udp".to_string())
@@ -464,14 +616,20 @@ fn dyn_tmtc_pool_main() {
         })
         .unwrap();
 
-    info!("Starting event handling task");
+    let mut opt_jh_sim_client = None;
-    let jh_event_handling = thread::Builder::new()
+    if let Some(mut sim_client) = opt_sim_client {
-        .name("sat-rs events".to_string())
+        info!("Starting UDP sim client task");
-        .spawn(move || loop {
+        opt_jh_sim_client = Some(
-            event_handler.periodic_operation();
+            thread::Builder::new()
-            thread::sleep(Duration::from_millis(FREQ_MS_EVENT_HANDLING));
+                .name("sat-rs sim adapter".to_string())
-        })
+                .spawn(move || loop {
-        .unwrap();
+                    if sim_client.operation() == HandlingStatus::Empty {
+                        std::thread::sleep(Duration::from_millis(SIM_CLIENT_IDLE_DELAY_MS));
+                    }
+                })
+                .unwrap(),
+        );
+    }
 
     info!("Starting AOCS thread");
     let jh_aocs = thread::Builder::new()
@@ -482,11 +640,27 @@ fn dyn_tmtc_pool_main() {
         })
         .unwrap();
 
+    info!("Starting EPS thread");
+    let jh_eps = thread::Builder::new()
+        .name("sat-rs eps".to_string())
+        .spawn(move || loop {
+            // TODO: We should introduce something like a fixed timeslot helper to allow a more
+            // declarative API. It would also be very useful for the AOCS task.
+            pcdu_handler.periodic_operation(eps::pcdu::OpCode::RegularOp);
+            thread::sleep(Duration::from_millis(50));
+            pcdu_handler.periodic_operation(eps::pcdu::OpCode::PollAndRecvReplies);
+            thread::sleep(Duration::from_millis(50));
+            pcdu_handler.periodic_operation(eps::pcdu::OpCode::PollAndRecvReplies);
+            thread::sleep(Duration::from_millis(300));
+        })
+        .unwrap();
+
     info!("Starting PUS handler thread");
     let jh_pus_handler = thread::Builder::new()
         .name("sat-rs pus".to_string())
         .spawn(move || loop {
             pus_stack.periodic_operation();
+            event_handler.periodic_operation();
             thread::sleep(Duration::from_millis(FREQ_MS_PUS_STACK));
         })
         .unwrap();
@@ -500,10 +674,13 @@ fn dyn_tmtc_pool_main() {
     jh_tm_funnel
         .join()
         .expect("Joining TM Funnel thread failed");
-    jh_event_handling
+    if let Some(jh_sim_client) = opt_jh_sim_client {
-        .join()
+        jh_sim_client
-        .expect("Joining Event Manager thread failed");
+            .join()
+            .expect("Joining SIM client thread failed");
+    }
     jh_aocs.join().expect("Joining AOCS thread failed");
+    jh_eps.join().expect("Joining EPS thread failed");
     jh_pus_handler
         .join()
         .expect("Joining PUS handler thread failed");

satrs-example/src/pus/action.rs

@@ -341,7 +341,7 @@ mod tests {
             let (tm_funnel_tx, tm_funnel_rx) = mpsc::channel();
             let (pus_action_tx, pus_action_rx) = mpsc::channel();
             let (action_reply_tx, action_reply_rx) = mpsc::channel();
-            let (action_req_tx, action_req_rx) = mpsc::channel();
+            let (action_req_tx, action_req_rx) = mpsc::sync_channel(10);
             let verif_reporter = TestVerificationReporter::new(owner_id);
             let mut generic_req_router = GenericRequestRouter::default();
             generic_req_router

satrs-example/src/pus/hk.rs

@@ -12,6 +12,7 @@ use satrs::pus::{
     PusPacketHandlingError, PusReplyHandler, PusServiceHelper, PusTcToRequestConverter,
 };
 use satrs::request::{GenericMessage, UniqueApidTargetId};
+use satrs::res_code::ResultU16;
 use satrs::spacepackets::ecss::tc::PusTcReader;
 use satrs::spacepackets::ecss::{hk, PusPacket, PusServiceId};
 use satrs::tmtc::{PacketAsVec, PacketSenderWithSharedPool};
@@ -34,6 +35,7 @@ pub struct HkReply {
 #[derive(Clone, PartialEq, Debug)]
 pub enum HkReplyVariant {
     Ack,
+    Failed(ResultU16),
 }
 
 #[derive(Default)]
@@ -69,6 +71,15 @@ impl PusReplyHandler<ActivePusRequestStd, HkReply> for HkReplyHandler {
                     .completion_success(tm_sender, started_token, time_stamp)
                     .expect("sending completion success verification failed");
             }
+            HkReplyVariant::Failed(failure_code) => {
+                verification_handler
+                    .completion_failure(
+                        tm_sender,
+                        started_token,
+                        FailParams::new(time_stamp, &failure_code, &[]),
+                    )
+                    .expect("sending completion success verification failed");
+            }
         };
         Ok(true)
     }

satrs-example/src/pus/mod.rs

@@ -19,7 +19,7 @@ use satrs::tmtc::{PacketAsVec, PacketInPool};
 use satrs::ComponentId;
 use satrs_example::config::components::PUS_ROUTING_SERVICE;
 use satrs_example::config::{tmtc_err, CustomPusServiceId};
-use satrs_example::TimeStampHelper;
+use satrs_example::TimestampHelper;
 use std::fmt::Debug;
 use std::sync::mpsc::{self, Sender};
 
@@ -53,7 +53,7 @@ pub struct PusTcDistributor<TmSender: EcssTmSender> {
     pub tm_sender: TmSender,
     pub verif_reporter: VerificationReporter,
     pub pus_router: PusTcMpscRouter,
-    stamp_helper: TimeStampHelper,
+    stamp_helper: TimestampHelper,
 }
 
 impl<TmSender: EcssTmSender> PusTcDistributor<TmSender> {
@@ -66,7 +66,7 @@ impl<TmSender: EcssTmSender> PusTcDistributor<TmSender> {
                 PUS_ROUTING_SERVICE.apid,
             ),
             pus_router,
-            stamp_helper: TimeStampHelper::default(),
+            stamp_helper: TimestampHelper::default(),
         }
     }
 

satrs-example/src/requests.rs

@@ -28,8 +28,9 @@ pub enum CompositeRequest {
 pub struct GenericRequestRouter {
     pub id: ComponentId,
     // All messages which do not have a dedicated queue.
-    pub composite_router_map: HashMap<ComponentId, mpsc::Sender<GenericMessage<CompositeRequest>>>,
+    pub composite_router_map:
-    pub mode_router_map: HashMap<ComponentId, mpsc::Sender<GenericMessage<ModeRequest>>>,
+        HashMap<ComponentId, mpsc::SyncSender<GenericMessage<CompositeRequest>>>,
+    pub mode_router_map: HashMap<ComponentId, mpsc::SyncSender<GenericMessage<ModeRequest>>>,
 }
 
 impl Default for GenericRequestRouter {

satrs-minisim/Cargo.toml

@@ -11,6 +11,8 @@ serde_json = "1"
 log = "0.4"
 thiserror = "1"
 fern = "0.5"
+strum = { version = "0.26", features = ["derive"] }
+num_enum = "0.7"
 humantime = "2"
 
 [dependencies.asynchronix]

satrs-minisim/src/acs.rs

@@ -6,14 +6,17 @@ use asynchronix::{
 };
 use satrs::power::SwitchStateBinary;
 use satrs_minisim::{
-    acs::{MgmReply, MgmSensorValues, MgtDipole, MgtHkSet, MgtReply, MGT_GEN_MAGNETIC_FIELD},
+    acs::{
+        lis3mdl::MgmLis3MdlReply, MgmReplyCommon, MgmReplyProvider, MgmSensorValuesMicroTesla,
+        MgtDipole, MgtHkSet, MgtReply, MGT_GEN_MAGNETIC_FIELD,
+    },
     SimReply,
 };
 
 use crate::time::current_millis;
 
-// Earth magnetic field varies between -30 uT and 30 uT
+// Earth magnetic field varies between roughly -30 uT and 30 uT
-const AMPLITUDE_MGM: f32 = 0.03;
+const AMPLITUDE_MGM_UT: f32 = 30.0;
 // Lets start with a simple frequency here.
 const FREQUENCY_MGM: f32 = 1.0;
 const PHASE_X: f32 = 0.0;
@@ -23,38 +26,37 @@ const PHASE_Z: f32 = 0.2;
 
 /// Simple model for a magnetometer where the measure magnetic fields are modeled with sine waves.
 ///
-/// Please note that that a more realistic MGM model wouold include the following components
+/// An ideal sensor would sample the magnetic field at a high fixed rate. This might not be
-/// which are not included here to simplify the model:
+/// possible for a general purpose OS, but self self-sampling at a relatively high rate (20-40 ms)
-///
+/// might still be possible and is probably sufficient for many OBSW needs.
-/// 1. It would probably generate signed [i16] values which need to be converted to SI units
+pub struct MagnetometerModel<ReplyProvider: MgmReplyProvider> {
-///    because it is a digital sensor
-/// 2. It would sample the magnetic field at a high fixed rate. This might not be possible for
-///    a general purpose OS, but self self-sampling at a relatively high rate (20-40 ms) might
-///    stil lbe possible.
-pub struct MagnetometerModel {
     pub switch_state: SwitchStateBinary,
     pub periodicity: Duration,
-    pub external_mag_field: Option<MgmSensorValues>,
+    pub external_mag_field: Option<MgmSensorValuesMicroTesla>,
     pub reply_sender: mpsc::Sender<SimReply>,
+    pub phatom: std::marker::PhantomData<ReplyProvider>,
 }
 
-impl MagnetometerModel {
+impl MagnetometerModel<MgmLis3MdlReply> {
-    pub fn new(periodicity: Duration, reply_sender: mpsc::Sender<SimReply>) -> Self {
+    pub fn new_for_lis3mdl(periodicity: Duration, reply_sender: mpsc::Sender<SimReply>) -> Self {
         Self {
             switch_state: SwitchStateBinary::Off,
             periodicity,
             external_mag_field: None,
             reply_sender,
+            phatom: std::marker::PhantomData,
         }
     }
+}
 
+impl<ReplyProvider: MgmReplyProvider> MagnetometerModel<ReplyProvider> {
     pub async fn switch_device(&mut self, switch_state: SwitchStateBinary) {
         self.switch_state = switch_state;
     }
 
     pub async fn send_sensor_values(&mut self, _: (), scheduler: &Scheduler<Self>) {
         self.reply_sender
-            .send(SimReply::new(MgmReply {
+            .send(ReplyProvider::create_mgm_reply(MgmReplyCommon {
                 switch_state: self.switch_state,
                 sensor_values: self.calculate_current_mgm_tuple(current_millis(scheduler.time())),
             }))
@@ -63,23 +65,23 @@ impl MagnetometerModel {
 
     // Devices like magnetorquers generate a strong magnetic field which overrides the default
     // model for the measured magnetic field.
-    pub async fn apply_external_magnetic_field(&mut self, field: MgmSensorValues) {
+    pub async fn apply_external_magnetic_field(&mut self, field: MgmSensorValuesMicroTesla) {
         self.external_mag_field = Some(field);
     }
 
-    fn calculate_current_mgm_tuple(&self, time_ms: u64) -> MgmSensorValues {
+    fn calculate_current_mgm_tuple(&self, time_ms: u64) -> MgmSensorValuesMicroTesla {
         if SwitchStateBinary::On == self.switch_state {
             if let Some(ext_field) = self.external_mag_field {
                 return ext_field;
             }
             let base_sin_val = 2.0 * PI * FREQUENCY_MGM * (time_ms as f32 / 1000.0);
-            return MgmSensorValues {
+            return MgmSensorValuesMicroTesla {
-                x: AMPLITUDE_MGM * (base_sin_val + PHASE_X).sin(),
+                x: AMPLITUDE_MGM_UT * (base_sin_val + PHASE_X).sin(),
-                y: AMPLITUDE_MGM * (base_sin_val + PHASE_Y).sin(),
+                y: AMPLITUDE_MGM_UT * (base_sin_val + PHASE_Y).sin(),
-                z: AMPLITUDE_MGM * (base_sin_val + PHASE_Z).sin(),
+                z: AMPLITUDE_MGM_UT * (base_sin_val + PHASE_Z).sin(),
             };
         }
-        MgmSensorValues {
+        MgmSensorValuesMicroTesla {
             x: 0.0,
             y: 0.0,
             z: 0.0,
@@ -87,13 +89,13 @@ impl MagnetometerModel {
     }
 }
 
-impl Model for MagnetometerModel {}
+impl<ReplyProvider: MgmReplyProvider> Model for MagnetometerModel<ReplyProvider> {}
 
 pub struct MagnetorquerModel {
     switch_state: SwitchStateBinary,
     torquing: bool,
     torque_dipole: MgtDipole,
-    pub gen_magnetic_field: Output<MgmSensorValues>,
+    pub gen_magnetic_field: Output<MgmSensorValuesMicroTesla>,
     reply_sender: mpsc::Sender<SimReply>,
 }
 
@@ -146,14 +148,14 @@ impl MagnetorquerModel {
 
     pub fn send_housekeeping_data(&mut self) {
         self.reply_sender
-            .send(SimReply::new(MgtReply::Hk(MgtHkSet {
+            .send(SimReply::new(&MgtReply::Hk(MgtHkSet {
                 dipole: self.torque_dipole,
                 torquing: self.torquing,
             })))
             .unwrap();
     }
 
-    fn calc_magnetic_field(&self, _: MgtDipole) -> MgmSensorValues {
+    fn calc_magnetic_field(&self, _: MgtDipole) -> MgmSensorValuesMicroTesla {
         // Simplified model: Just returns some fixed magnetic field for now.
         // Later, we could make this more fancy by incorporating the commanded dipole.
         MGT_GEN_MAGNETIC_FIELD
@@ -179,9 +181,12 @@ pub mod tests {
 
     use satrs::power::SwitchStateBinary;
     use satrs_minisim::{
-        acs::{MgmReply, MgmRequest, MgtDipole, MgtHkSet, MgtReply, MgtRequest},
+        acs::{
+            lis3mdl::{self, MgmLis3MdlReply},
+            MgmRequestLis3Mdl, MgtDipole, MgtHkSet, MgtReply, MgtRequest,
+        },
         eps::PcduSwitch,
-        SerializableSimMsgPayload, SimMessageProvider, SimRequest, SimTarget,
+        SerializableSimMsgPayload, SimComponent, SimMessageProvider, SimRequest,
     };
 
     use crate::{eps::tests::switch_device_on, test_helpers::SimTestbench};
@@ -189,7 +194,7 @@ pub mod tests {
     #[test]
     fn test_basic_mgm_request() {
         let mut sim_testbench = SimTestbench::new();
-        let request = SimRequest::new_with_epoch_time(MgmRequest::RequestSensorData);
+        let request = SimRequest::new_with_epoch_time(MgmRequestLis3Mdl::RequestSensorData);
         sim_testbench
             .send_request(request)
             .expect("sending MGM request failed");
@@ -198,13 +203,13 @@ pub mod tests {
         let sim_reply = sim_testbench.try_receive_next_reply();
         assert!(sim_reply.is_some());
         let sim_reply = sim_reply.unwrap();
-        assert_eq!(sim_reply.target(), SimTarget::Mgm);
+        assert_eq!(sim_reply.component(), SimComponent::MgmLis3Mdl);
-        let reply = MgmReply::from_sim_message(&sim_reply)
+        let reply = MgmLis3MdlReply::from_sim_message(&sim_reply)
             .expect("failed to deserialize MGM sensor values");
-        assert_eq!(reply.switch_state, SwitchStateBinary::Off);
+        assert_eq!(reply.common.switch_state, SwitchStateBinary::Off);
-        assert_eq!(reply.sensor_values.x, 0.0);
+        assert_eq!(reply.common.sensor_values.x, 0.0);
-        assert_eq!(reply.sensor_values.y, 0.0);
+        assert_eq!(reply.common.sensor_values.y, 0.0);
-        assert_eq!(reply.sensor_values.z, 0.0);
+        assert_eq!(reply.common.sensor_values.z, 0.0);
     }
 
     #[test]
@@ -212,7 +217,7 @@ pub mod tests {
         let mut sim_testbench = SimTestbench::new();
         switch_device_on(&mut sim_testbench, PcduSwitch::Mgm);
 
-        let mut request = SimRequest::new_with_epoch_time(MgmRequest::RequestSensorData);
+        let mut request = SimRequest::new_with_epoch_time(MgmRequestLis3Mdl::RequestSensorData);
         sim_testbench
             .send_request(request)
             .expect("sending MGM request failed");
@@ -221,12 +226,12 @@ pub mod tests {
         let mut sim_reply_res = sim_testbench.try_receive_next_reply();
         assert!(sim_reply_res.is_some());
         let mut sim_reply = sim_reply_res.unwrap();
-        assert_eq!(sim_reply.target(), SimTarget::Mgm);
+        assert_eq!(sim_reply.component(), SimComponent::MgmLis3Mdl);
-        let first_reply = MgmReply::from_sim_message(&sim_reply)
+        let first_reply = MgmLis3MdlReply::from_sim_message(&sim_reply)
             .expect("failed to deserialize MGM sensor values");
         sim_testbench.step_by(Duration::from_millis(50));
 
-        request = SimRequest::new_with_epoch_time(MgmRequest::RequestSensorData);
+        request = SimRequest::new_with_epoch_time(MgmRequestLis3Mdl::RequestSensorData);
         sim_testbench
             .send_request(request)
             .expect("sending MGM request failed");
@@ -236,8 +241,24 @@ pub mod tests {
         assert!(sim_reply_res.is_some());
         sim_reply = sim_reply_res.unwrap();
 
-        let second_reply = MgmReply::from_sim_message(&sim_reply)
+        let second_reply = MgmLis3MdlReply::from_sim_message(&sim_reply)
             .expect("failed to deserialize MGM sensor values");
+        let x_conv_back = second_reply.raw.x as f32
+            * lis3mdl::FIELD_LSB_PER_GAUSS_4_SENS
+            * lis3mdl::GAUSS_TO_MICROTESLA_FACTOR as f32;
+        let y_conv_back = second_reply.raw.y as f32
+            * lis3mdl::FIELD_LSB_PER_GAUSS_4_SENS
+            * lis3mdl::GAUSS_TO_MICROTESLA_FACTOR as f32;
+        let z_conv_back = second_reply.raw.z as f32
+            * lis3mdl::FIELD_LSB_PER_GAUSS_4_SENS
+            * lis3mdl::GAUSS_TO_MICROTESLA_FACTOR as f32;
+        let diff_x = (second_reply.common.sensor_values.x - x_conv_back).abs();
+        assert!(diff_x < 0.01, "diff x too large: {}", diff_x);
+        let diff_y = (second_reply.common.sensor_values.y - y_conv_back).abs();
+        assert!(diff_y < 0.01, "diff y too large: {}", diff_y);
+        let diff_z = (second_reply.common.sensor_values.z - z_conv_back).abs();
+        assert!(diff_z < 0.01, "diff z too large: {}", diff_z);
+        // assert_eq!(second_reply.raw_reply, SwitchStateBinary::On);
         // Check that the values are changing.
         assert!(first_reply != second_reply);
     }

satrs-minisim/src/controller.rs

@@ -5,10 +5,10 @@ use asynchronix::{
     time::{Clock, MonotonicTime, SystemClock},
 };
 use satrs_minisim::{
-    acs::{MgmRequest, MgtRequest},
+    acs::{lis3mdl::MgmLis3MdlReply, MgmRequestLis3Mdl, MgtRequest},
     eps::PcduRequest,
-    SerializableSimMsgPayload, SimCtrlReply, SimCtrlRequest, SimMessageProvider, SimReply,
+    SerializableSimMsgPayload, SimComponent, SimCtrlReply, SimCtrlRequest, SimMessageProvider,
-    SimRequest, SimRequestError, SimTarget,
+    SimReply, SimRequest, SimRequestError,
 };
 
 use crate::{
@@ -16,13 +16,18 @@ use crate::{
     eps::PcduModel,
 };
 
+const SIM_CTRL_REQ_WIRETAPPING: bool = true;
+const MGM_REQ_WIRETAPPING: bool = true;
+const PCDU_REQ_WIRETAPPING: bool = true;
+const MGT_REQ_WIRETAPPING: bool = true;
+
 // The simulation controller processes requests and drives the simulation.
 pub struct SimController {
     pub sys_clock: SystemClock,
     pub request_receiver: mpsc::Receiver<SimRequest>,
     pub reply_sender: mpsc::Sender<SimReply>,
     pub simulation: Simulation,
-    pub mgm_addr: Address<MagnetometerModel>,
+    pub mgm_addr: Address<MagnetometerModel<MgmLis3MdlReply>>,
     pub pcdu_addr: Address<PcduModel>,
     pub mgt_addr: Address<MagnetorquerModel>,
 }
@@ -33,7 +38,7 @@ impl SimController {
         request_receiver: mpsc::Receiver<SimRequest>,
         reply_sender: mpsc::Sender<SimReply>,
         simulation: Simulation,
-        mgm_addr: Address<MagnetometerModel>,
+        mgm_addr: Address<MagnetometerModel<MgmLis3MdlReply>>,
         pcdu_addr: Address<PcduModel>,
         mgt_addr: Address<MagnetorquerModel>,
     ) -> Self {
@@ -70,11 +75,11 @@ impl SimController {
                     if request.timestamp < old_timestamp {
                         log::warn!("stale data with timestamp {:?} received", request.timestamp);
                     }
-                    if let Err(e) = match request.target() {
+                    if let Err(e) = match request.component() {
-                        SimTarget::SimCtrl => self.handle_ctrl_request(&request),
+                        SimComponent::SimCtrl => self.handle_ctrl_request(&request),
-                        SimTarget::Mgm => self.handle_mgm_request(&request),
+                        SimComponent::MgmLis3Mdl => self.handle_mgm_request(&request),
-                        SimTarget::Mgt => self.handle_mgt_request(&request),
+                        SimComponent::Mgt => self.handle_mgt_request(&request),
-                        SimTarget::Pcdu => self.handle_pcdu_request(&request),
+                        SimComponent::Pcdu => self.handle_pcdu_request(&request),
                     } {
                         self.handle_invalid_request_with_valid_target(e, &request)
                     }
@@ -91,19 +96,26 @@ impl SimController {
 
     fn handle_ctrl_request(&mut self, request: &SimRequest) -> Result<(), SimRequestError> {
         let sim_ctrl_request = SimCtrlRequest::from_sim_message(request)?;
+        if SIM_CTRL_REQ_WIRETAPPING {
+            log::info!("received sim ctrl request: {:?}", sim_ctrl_request);
+        }
         match sim_ctrl_request {
             SimCtrlRequest::Ping => {
                 self.reply_sender
-                    .send(SimReply::new(SimCtrlReply::Pong))
+                    .send(SimReply::new(&SimCtrlReply::Pong))
                     .expect("sending reply from sim controller failed");
             }
         }
         Ok(())
     }
+
     fn handle_mgm_request(&mut self, request: &SimRequest) -> Result<(), SimRequestError> {
-        let mgm_request = MgmRequest::from_sim_message(request)?;
+        let mgm_request = MgmRequestLis3Mdl::from_sim_message(request)?;
+        if MGM_REQ_WIRETAPPING {
+            log::info!("received MGM request: {:?}", mgm_request);
+        }
         match mgm_request {
-            MgmRequest::RequestSensorData => {
+            MgmRequestLis3Mdl::RequestSensorData => {
                 self.simulation.send_event(
                     MagnetometerModel::send_sensor_values,
                     (),
@@ -116,6 +128,9 @@ impl SimController {
 
     fn handle_pcdu_request(&mut self, request: &SimRequest) -> Result<(), SimRequestError> {
         let pcdu_request = PcduRequest::from_sim_message(request)?;
+        if PCDU_REQ_WIRETAPPING {
+            log::info!("received PCDU request: {:?}", pcdu_request);
+        }
         match pcdu_request {
             PcduRequest::RequestSwitchInfo => {
                 self.simulation
@@ -134,6 +149,9 @@ impl SimController {
 
     fn handle_mgt_request(&mut self, request: &SimRequest) -> Result<(), SimRequestError> {
         let mgt_request = MgtRequest::from_sim_message(request)?;
+        if MGT_REQ_WIRETAPPING {
+            log::info!("received MGT request: {:?}", mgt_request);
+        }
         match mgt_request {
             MgtRequest::ApplyTorque { duration, dipole } => self.simulation.send_event(
                 MagnetorquerModel::apply_torque,
@@ -156,11 +174,11 @@ impl SimController {
     ) {
         log::warn!(
             "received invalid {:?} request: {:?}",
-            request.target(),
+            request.component(),
             error
         );
         self.reply_sender
-            .send(SimReply::new(SimCtrlReply::from(error)))
+            .send(SimReply::new(&SimCtrlReply::from(error)))
             .expect("sending reply from sim controller failed");
     }
 }
@@ -183,7 +201,7 @@ mod tests {
         let sim_reply = sim_testbench.try_receive_next_reply();
         assert!(sim_reply.is_some());
         let sim_reply = sim_reply.unwrap();
-        assert_eq!(sim_reply.target(), SimTarget::SimCtrl);
+        assert_eq!(sim_reply.component(), SimComponent::SimCtrl);
         let reply = SimCtrlReply::from_sim_message(&sim_reply)
             .expect("failed to deserialize MGM sensor values");
         assert_eq!(reply, SimCtrlReply::Pong);

satrs-minisim/src/eps.rs

@@ -1,4 +1,4 @@
-use std::{collections::HashMap, sync::mpsc, time::Duration};
+use std::{sync::mpsc, time::Duration};
 
 use asynchronix::{
     model::{Model, Output},
@@ -6,14 +6,14 @@ use asynchronix::{
 };
 use satrs::power::SwitchStateBinary;
 use satrs_minisim::{
-    eps::{PcduReply, PcduSwitch, SwitchMap},
+    eps::{PcduReply, PcduSwitch, SwitchMapBinaryWrapper},
     SimReply,
 };
 
 pub const SWITCH_INFO_DELAY_MS: u64 = 10;
 
 pub struct PcduModel {
-    pub switcher_map: SwitchMap,
+    pub switcher_map: SwitchMapBinaryWrapper,
     pub mgm_switch: Output<SwitchStateBinary>,
     pub mgt_switch: Output<SwitchStateBinary>,
     pub reply_sender: mpsc::Sender<SimReply>,
@@ -21,12 +21,8 @@ pub struct PcduModel {
 
 impl PcduModel {
     pub fn new(reply_sender: mpsc::Sender<SimReply>) -> Self {
-        let mut switcher_map = HashMap::new();
-        switcher_map.insert(PcduSwitch::Mgm, SwitchStateBinary::Off);
-        switcher_map.insert(PcduSwitch::Mgt, SwitchStateBinary::Off);
-
         Self {
-            switcher_map,
+            switcher_map: Default::default(),
             mgm_switch: Output::new(),
             mgt_switch: Output::new(),
             reply_sender,
@@ -44,7 +40,7 @@ impl PcduModel {
     }
 
     pub fn send_switch_info(&mut self) {
-        let reply = SimReply::new(PcduReply::SwitchInfo(self.switcher_map.clone()));
+        let reply = SimReply::new(&PcduReply::SwitchInfo(self.switcher_map.0.clone()));
         self.reply_sender.send(reply).unwrap();
     }
 
@@ -54,6 +50,7 @@ impl PcduModel {
     ) {
         let val = self
             .switcher_map
+            .0
             .get_mut(&switch_and_target_state.0)
             .unwrap_or_else(|| panic!("switch {:?} not found", switch_and_target_state.0));
         *val = switch_and_target_state.1;
@@ -76,7 +73,8 @@ pub(crate) mod tests {
     use std::time::Duration;
 
     use satrs_minisim::{
-        eps::PcduRequest, SerializableSimMsgPayload, SimMessageProvider, SimRequest, SimTarget,
+        eps::{PcduRequest, SwitchMapBinary},
+        SerializableSimMsgPayload, SimComponent, SimMessageProvider, SimRequest,
     };
 
     use crate::test_helpers::SimTestbench;
@@ -105,14 +103,11 @@ pub(crate) mod tests {
         switch_device(sim_testbench, switch, SwitchStateBinary::On);
     }
 
-    pub(crate) fn get_all_off_switch_map() -> SwitchMap {
+    pub(crate) fn get_all_off_switch_map() -> SwitchMapBinary {
-        let mut switcher_map = SwitchMap::new();
+        SwitchMapBinaryWrapper::default().0
-        switcher_map.insert(super::PcduSwitch::Mgm, super::SwitchStateBinary::Off);
-        switcher_map.insert(super::PcduSwitch::Mgt, super::SwitchStateBinary::Off);
-        switcher_map
     }
 
-    fn check_switch_state(sim_testbench: &mut SimTestbench, expected_switch_map: &SwitchMap) {
+    fn check_switch_state(sim_testbench: &mut SimTestbench, expected_switch_map: &SwitchMapBinary) {
         let request = SimRequest::new_with_epoch_time(PcduRequest::RequestSwitchInfo);
         sim_testbench
             .send_request(request)
@@ -122,7 +117,7 @@ pub(crate) mod tests {
         let sim_reply = sim_testbench.try_receive_next_reply();
         assert!(sim_reply.is_some());
         let sim_reply = sim_reply.unwrap();
-        assert_eq!(sim_reply.target(), SimTarget::Pcdu);
+        assert_eq!(sim_reply.component(), SimComponent::Pcdu);
         let pcdu_reply = PcduReply::from_sim_message(&sim_reply)
             .expect("failed to deserialize PCDU switch info");
         match pcdu_reply {
@@ -157,7 +152,7 @@ pub(crate) mod tests {
         let sim_reply = sim_testbench.try_receive_next_reply();
         assert!(sim_reply.is_some());
         let sim_reply = sim_reply.unwrap();
-        assert_eq!(sim_reply.target(), SimTarget::Pcdu);
+        assert_eq!(sim_reply.component(), SimComponent::Pcdu);
         let pcdu_reply = PcduReply::from_sim_message(&sim_reply)
             .expect("failed to deserialize PCDU switch info");
         match pcdu_reply {

satrs-minisim/src/lib.rs

@@ -1,19 +1,18 @@
 use asynchronix::time::MonotonicTime;
+use num_enum::{IntoPrimitive, TryFromPrimitive};
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
 
-pub const SIM_CTRL_UDP_PORT: u16 = 7303;
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize, Hash)]
-
+pub enum SimComponent {
-#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub enum SimTarget {
     SimCtrl,
-    Mgm,
+    MgmLis3Mdl,
     Mgt,
     Pcdu,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct SimMessage {
-    pub target: SimTarget,
+    pub target: SimComponent,
     pub payload: String,
 }
 
@@ -37,10 +36,10 @@ pub enum SimMessageType {
 pub trait SerializableSimMsgPayload<P: SimMessageProvider>:
     Serialize + DeserializeOwned + Sized
 {
-    const TARGET: SimTarget;
+    const TARGET: SimComponent;
 
     fn from_sim_message(sim_message: &P) -> Result<Self, SimMessageError<P>> {
-        if sim_message.target() == Self::TARGET {
+        if sim_message.component() == Self::TARGET {
             return Ok(serde_json::from_str(sim_message.payload())?);
         }
         Err(SimMessageError::TargetRequestMissmatch(sim_message.clone()))
@@ -49,7 +48,7 @@ pub trait SerializableSimMsgPayload<P: SimMessageProvider>:
 
 pub trait SimMessageProvider: Serialize + DeserializeOwned + Clone + Sized {
     fn msg_type(&self) -> SimMessageType;
-    fn target(&self) -> SimTarget;
+    fn component(&self) -> SimComponent;
     fn payload(&self) -> &String;
     fn from_raw_data(data: &[u8]) -> serde_json::Result<Self> {
         serde_json::from_slice(data)
@@ -78,7 +77,7 @@ impl SimRequest {
 }
 
 impl SimMessageProvider for SimRequest {
-    fn target(&self) -> SimTarget {
+    fn component(&self) -> SimComponent {
         self.inner.target
     }
     fn payload(&self) -> &String {
@@ -91,25 +90,25 @@ impl SimMessageProvider for SimRequest {
 }
 
 /// A generic simulation reply type. Right now, the payload data is expected to be
-/// JSON, which might be changed inthe future.
+/// JSON, which might be changed in the future.
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct SimReply {
     inner: SimMessage,
 }
 
 impl SimReply {
-    pub fn new<T: SerializableSimMsgPayload<SimReply>>(serializable_reply: T) -> Self {
+    pub fn new<T: SerializableSimMsgPayload<SimReply>>(serializable_reply: &T) -> Self {
         Self {
             inner: SimMessage {
                 target: T::TARGET,
-                payload: serde_json::to_string(&serializable_reply).unwrap(),
+                payload: serde_json::to_string(serializable_reply).unwrap(),
             },
         }
     }
 }
 
 impl SimMessageProvider for SimReply {
-    fn target(&self) -> SimTarget {
+    fn component(&self) -> SimComponent {
         self.inner.target
     }
     fn payload(&self) -> &String {
@@ -126,7 +125,7 @@ pub enum SimCtrlRequest {
 }
 
 impl SerializableSimMsgPayload<SimRequest> for SimCtrlRequest {
-    const TARGET: SimTarget = SimTarget::SimCtrl;
+    const TARGET: SimComponent = SimComponent::SimCtrl;
 }
 
 pub type SimReplyError = SimMessageError<SimReply>;
@@ -151,7 +150,7 @@ pub enum SimCtrlReply {
 }
 
 impl SerializableSimMsgPayload<SimReply> for SimCtrlReply {
-    const TARGET: SimTarget = SimTarget::SimCtrl;
+    const TARGET: SimComponent = SimComponent::SimCtrl;
 }
 
 impl From<SimRequestError> for SimCtrlReply {
@@ -162,18 +161,81 @@ impl From<SimRequestError> for SimCtrlReply {
 
 pub mod eps {
     use super::*;
+    use satrs::power::{SwitchState, SwitchStateBinary};
     use std::collections::HashMap;
+    use strum::{EnumIter, IntoEnumIterator};
 
-    use satrs::power::SwitchStateBinary;
+    pub type SwitchMap = HashMap<PcduSwitch, SwitchState>;
+    pub type SwitchMapBinary = HashMap<PcduSwitch, SwitchStateBinary>;
 
-    pub type SwitchMap = HashMap<PcduSwitch, SwitchStateBinary>;
+    pub struct SwitchMapWrapper(pub SwitchMap);
+    pub struct SwitchMapBinaryWrapper(pub SwitchMapBinary);
 
-    #[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize, Hash)]
+    #[derive(
+        Debug,
+        Copy,
+        Clone,
+        PartialEq,
+        Eq,
+        Serialize,
+        Deserialize,
+        Hash,
+        EnumIter,
+        IntoPrimitive,
+        TryFromPrimitive,
+    )]
+    #[repr(u16)]
     pub enum PcduSwitch {
         Mgm = 0,
         Mgt = 1,
     }
 
+    impl Default for SwitchMapBinaryWrapper {
+        fn default() -> Self {
+            let mut switch_map = SwitchMapBinary::default();
+            for entry in PcduSwitch::iter() {
+                switch_map.insert(entry, SwitchStateBinary::Off);
+            }
+            Self(switch_map)
+        }
+    }
+
+    impl Default for SwitchMapWrapper {
+        fn default() -> Self {
+            let mut switch_map = SwitchMap::default();
+            for entry in PcduSwitch::iter() {
+                switch_map.insert(entry, SwitchState::Unknown);
+            }
+            Self(switch_map)
+        }
+    }
+
+    impl SwitchMapWrapper {
+        pub fn new_with_init_switches_off() -> Self {
+            let mut switch_map = SwitchMap::default();
+            for entry in PcduSwitch::iter() {
+                switch_map.insert(entry, SwitchState::Off);
+            }
+            Self(switch_map)
+        }
+
+        pub fn from_binary_switch_map_ref(switch_map: &SwitchMapBinary) -> Self {
+            Self(
+                switch_map
+                    .iter()
+                    .map(|(key, value)| (*key, SwitchState::from(*value)))
+                    .collect(),
+            )
+        }
+    }
+
+    #[derive(Debug, Copy, Clone)]
+    #[repr(u8)]
+    pub enum PcduRequestId {
+        SwitchDevice = 0,
+        RequestSwitchInfo = 1,
+    }
+
     #[derive(Debug, Copy, Clone, Serialize, Deserialize)]
     pub enum PcduRequest {
         SwitchDevice {
@@ -184,16 +246,17 @@ pub mod eps {
     }
 
     impl SerializableSimMsgPayload<SimRequest> for PcduRequest {
-        const TARGET: SimTarget = SimTarget::Pcdu;
+        const TARGET: SimComponent = SimComponent::Pcdu;
     }
 
-    #[derive(Debug, Clone, Serialize, Deserialize)]
+    #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
     pub enum PcduReply {
-        SwitchInfo(SwitchMap),
+        // Ack,
+        SwitchInfo(SwitchMapBinary),
     }
 
     impl SerializableSimMsgPayload<SimReply> for PcduReply {
-        const TARGET: SimTarget = SimTarget::Pcdu;
+        const TARGET: SimComponent = SimComponent::Pcdu;
     }
 }
 
@@ -204,40 +267,116 @@ pub mod acs {
 
     use super::*;
 
+    pub trait MgmReplyProvider: Send + 'static {
+        fn create_mgm_reply(common: MgmReplyCommon) -> SimReply;
+    }
+
     #[derive(Debug, Copy, Clone, Serialize, Deserialize)]
-    pub enum MgmRequest {
+    pub enum MgmRequestLis3Mdl {
         RequestSensorData,
     }
 
-    impl SerializableSimMsgPayload<SimRequest> for MgmRequest {
+    impl SerializableSimMsgPayload<SimRequest> for MgmRequestLis3Mdl {
-        const TARGET: SimTarget = SimTarget::Mgm;
+        const TARGET: SimComponent = SimComponent::MgmLis3Mdl;
     }
 
     // Normally, small magnetometers generate their output as a signed 16 bit raw format or something
     // similar which needs to be converted to a signed float value with physical units. We will
-    // simplify this now and generate the signed float values directly.
+    // simplify this now and generate the signed float values directly. The unit is micro tesla.
     #[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
-    pub struct MgmSensorValues {
+    pub struct MgmSensorValuesMicroTesla {
         pub x: f32,
         pub y: f32,
         pub z: f32,
     }
 
     #[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
-    pub struct MgmReply {
+    pub struct MgmReplyCommon {
         pub switch_state: SwitchStateBinary,
-        pub sensor_values: MgmSensorValues,
+        pub sensor_values: MgmSensorValuesMicroTesla,
     }
 
-    impl SerializableSimMsgPayload<SimReply> for MgmReply {
+    pub const MGT_GEN_MAGNETIC_FIELD: MgmSensorValuesMicroTesla = MgmSensorValuesMicroTesla {
-        const TARGET: SimTarget = SimTarget::Mgm;
+        x: 30.0,
-    }
+        y: -30.0,
-
+        z: 30.0,
-    pub const MGT_GEN_MAGNETIC_FIELD: MgmSensorValues = MgmSensorValues {
-        x: 0.03,
-        y: -0.03,
-        z: 0.03,
     };
+    pub const ALL_ONES_SENSOR_VAL: i16 = 0xffff_u16 as i16;
+
+    pub mod lis3mdl {
+        use super::*;
+
+        // Field data register scaling
+        pub const GAUSS_TO_MICROTESLA_FACTOR: u32 = 100;
+        pub const FIELD_LSB_PER_GAUSS_4_SENS: f32 = 1.0 / 6842.0;
+        pub const FIELD_LSB_PER_GAUSS_8_SENS: f32 = 1.0 / 3421.0;
+        pub const FIELD_LSB_PER_GAUSS_12_SENS: f32 = 1.0 / 2281.0;
+        pub const FIELD_LSB_PER_GAUSS_16_SENS: f32 = 1.0 / 1711.0;
+
+        #[derive(Default, Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
+        pub struct MgmLis3RawValues {
+            pub x: i16,
+            pub y: i16,
+            pub z: i16,
+        }
+
+        #[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
+        pub struct MgmLis3MdlReply {
+            pub common: MgmReplyCommon,
+            // Raw sensor values which are transmitted by the LIS3 device in little-endian
+            // order.
+            pub raw: MgmLis3RawValues,
+        }
+
+        impl MgmLis3MdlReply {
+            pub fn new(common: MgmReplyCommon) -> Self {
+                match common.switch_state {
+                    SwitchStateBinary::Off => Self {
+                        common,
+                        raw: MgmLis3RawValues {
+                            x: ALL_ONES_SENSOR_VAL,
+                            y: ALL_ONES_SENSOR_VAL,
+                            z: ALL_ONES_SENSOR_VAL,
+                        },
+                    },
+                    SwitchStateBinary::On => {
+                        let mut raw_reply: [u8; 7] = [0; 7];
+                        let raw_x: i16 = (common.sensor_values.x
+                            / (GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS))
+                            .round() as i16;
+                        let raw_y: i16 = (common.sensor_values.y
+                            / (GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS))
+                            .round() as i16;
+                        let raw_z: i16 = (common.sensor_values.z
+                            / (GAUSS_TO_MICROTESLA_FACTOR as f32 * FIELD_LSB_PER_GAUSS_4_SENS))
+                            .round() as i16;
+                        // The first byte is a dummy byte.
+                        raw_reply[1..3].copy_from_slice(&raw_x.to_be_bytes());
+                        raw_reply[3..5].copy_from_slice(&raw_y.to_be_bytes());
+                        raw_reply[5..7].copy_from_slice(&raw_z.to_be_bytes());
+                        Self {
+                            common,
+                            raw: MgmLis3RawValues {
+                                x: raw_x,
+                                y: raw_y,
+                                z: raw_z,
+                            },
+                        }
+                    }
+                }
+            }
+        }
+
+        impl SerializableSimMsgPayload<SimReply> for MgmLis3MdlReply {
+            const TARGET: SimComponent = SimComponent::MgmLis3Mdl;
+        }
+
+        impl MgmReplyProvider for MgmLis3MdlReply {
+            fn create_mgm_reply(common: MgmReplyCommon) -> SimReply {
+                SimReply::new(&Self::new(common))
+            }
+        }
+    }
 
     // Simple model using i16 values.
     #[derive(Default, Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
@@ -262,7 +401,7 @@ pub mod acs {
     }
 
     impl SerializableSimMsgPayload<SimRequest> for MgtRequest {
-        const TARGET: SimTarget = SimTarget::Mgt;
+        const TARGET: SimComponent = SimComponent::Mgt;
     }
 
     #[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
@@ -279,78 +418,12 @@ pub mod acs {
     }
 
     impl SerializableSimMsgPayload<SimReply> for MgtReply {
-        const TARGET: SimTarget = SimTarget::Mgm;
+        const TARGET: SimComponent = SimComponent::MgmLis3Mdl;
     }
 }
 
 pub mod udp {
-    use std::{
+    pub const SIM_CTRL_PORT: u16 = 7303;
-        net::{SocketAddr, UdpSocket},
-        time::Duration,
-    };
-
-    use thiserror::Error;
-
-    use crate::{SimReply, SimRequest};
-
-    #[derive(Error, Debug)]
-    pub enum ReceptionError {
-        #[error("IO error: {0}")]
-        Io(#[from] std::io::Error),
-        #[error("Serde JSON error: {0}")]
-        SerdeJson(#[from] serde_json::Error),
-    }
-
-    pub struct SimUdpClient {
-        socket: UdpSocket,
-        pub reply_buf: [u8; 4096],
-    }
-
-    impl SimUdpClient {
-        pub fn new(
-            server_addr: &SocketAddr,
-            non_blocking: bool,
-            read_timeot_ms: Option<u64>,
-        ) -> std::io::Result<Self> {
-            let socket = UdpSocket::bind("127.0.0.1:0")?;
-            socket.set_nonblocking(non_blocking)?;
-            socket
-                .connect(server_addr)
-                .expect("could not connect to server addr");
-            if let Some(read_timeout) = read_timeot_ms {
-                // Set a read timeout so the test does not hang on failures.
-                socket.set_read_timeout(Some(Duration::from_millis(read_timeout)))?;
-            }
-            Ok(Self {
-                socket,
-                reply_buf: [0; 4096],
-            })
-        }
-
-        pub fn set_nonblocking(&self, non_blocking: bool) -> std::io::Result<()> {
-            self.socket.set_nonblocking(non_blocking)
-        }
-
-        pub fn set_read_timeout(&self, read_timeout_ms: u64) -> std::io::Result<()> {
-            self.socket
-                .set_read_timeout(Some(Duration::from_millis(read_timeout_ms)))
-        }
-
-        pub fn send_request(&self, sim_request: &SimRequest) -> std::io::Result<usize> {
-            self.socket.send(
-                &serde_json::to_vec(sim_request).expect("conversion of request to vector failed"),
-            )
-        }
-
-        pub fn recv_raw(&mut self) -> std::io::Result<usize> {
-            self.socket.recv(&mut self.reply_buf)
-        }
-
-        pub fn recv_sim_reply(&mut self) -> Result<SimReply, ReceptionError> {
-            let read_len = self.recv_raw()?;
-            Ok(serde_json::from_slice(&self.reply_buf[0..read_len])?)
-        }
-    }
 }
 
 #[cfg(test)]
@@ -363,7 +436,7 @@ pub mod tests {
     }
 
     impl SerializableSimMsgPayload<SimRequest> for DummyRequest {
-        const TARGET: SimTarget = SimTarget::SimCtrl;
+        const TARGET: SimComponent = SimComponent::SimCtrl;
     }
 
     #[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
@@ -372,13 +445,13 @@ pub mod tests {
     }
 
     impl SerializableSimMsgPayload<SimReply> for DummyReply {
-        const TARGET: SimTarget = SimTarget::SimCtrl;
+        const TARGET: SimComponent = SimComponent::SimCtrl;
     }
 
     #[test]
     fn test_basic_request() {
         let sim_request = SimRequest::new_with_epoch_time(DummyRequest::Ping);
-        assert_eq!(sim_request.target(), SimTarget::SimCtrl);
+        assert_eq!(sim_request.component(), SimComponent::SimCtrl);
         assert_eq!(sim_request.msg_type(), SimMessageType::Request);
         let dummy_request =
             DummyRequest::from_sim_message(&sim_request).expect("deserialization failed");
@@ -387,8 +460,8 @@ pub mod tests {
 
     #[test]
     fn test_basic_reply() {
-        let sim_reply = SimReply::new(DummyReply::Pong);
+        let sim_reply = SimReply::new(&DummyReply::Pong);
-        assert_eq!(sim_reply.target(), SimTarget::SimCtrl);
+        assert_eq!(sim_reply.component(), SimComponent::SimCtrl);
         assert_eq!(sim_reply.msg_type(), SimMessageType::Reply);
         let dummy_request =
             DummyReply::from_sim_message(&sim_reply).expect("deserialization failed");

satrs-minisim/src/main.rs

@@ -3,7 +3,8 @@ use asynchronix::simulation::{Mailbox, SimInit};
 use asynchronix::time::{MonotonicTime, SystemClock};
 use controller::SimController;
 use eps::PcduModel;
-use satrs_minisim::{SimReply, SimRequest, SIM_CTRL_UDP_PORT};
+use satrs_minisim::udp::SIM_CTRL_PORT;
+use satrs_minisim::{SimReply, SimRequest};
 use std::sync::mpsc;
 use std::thread;
 use std::time::{Duration, SystemTime};
@@ -30,7 +31,8 @@ fn create_sim_controller(
     request_receiver: mpsc::Receiver<SimRequest>,
 ) -> SimController {
     // Instantiate models and their mailboxes.
-    let mgm_model = MagnetometerModel::new(Duration::from_millis(50), reply_sender.clone());
+    let mgm_model =
+        MagnetometerModel::new_for_lis3mdl(Duration::from_millis(50), reply_sender.clone());
 
     let mgm_mailbox = Mailbox::new();
     let mgm_addr = mgm_mailbox.address();
@@ -112,9 +114,9 @@ fn main() {
     });
 
     let mut udp_server =
-        SimUdpServer::new(SIM_CTRL_UDP_PORT, request_sender, reply_receiver, 200, None)
+        SimUdpServer::new(SIM_CTRL_PORT, request_sender, reply_receiver, 200, None)
             .expect("could not create UDP request server");
-    log::info!("starting UDP server on port {}", SIM_CTRL_UDP_PORT);
+    log::info!("starting UDP server on port {}", SIM_CTRL_PORT);
     // This thread manages the simulator UDP server.
     let udp_tc_thread = thread::spawn(move || {
         udp_server.run();

satrs-minisim/src/udp.rs

@@ -150,6 +150,7 @@ impl SimUdpServer {
 mod tests {
     use std::{
         io::ErrorKind,
+        net::{SocketAddr, UdpSocket},
         sync::{
             atomic::{AtomicBool, Ordering},
             mpsc, Arc,
@@ -159,7 +160,6 @@ mod tests {
 
     use satrs_minisim::{
         eps::{PcduReply, PcduRequest},
-        udp::{ReceptionError, SimUdpClient},
         SimCtrlReply, SimCtrlRequest, SimReply, SimRequest,
     };
 
@@ -171,8 +171,57 @@ mod tests {
     // Wait time to ensure even possibly laggy systems like CI servers can run the tests.
     const SERVER_WAIT_TIME_MS: u64 = 50;
 
+    #[derive(thiserror::Error, Debug)]
+    pub enum ReceptionError {
+        #[error("IO error: {0}")]
+        Io(#[from] std::io::Error),
+        #[error("Serde JSON error: {0}")]
+        SerdeJson(#[from] serde_json::Error),
+    }
+
+    pub struct SimUdpTestClient {
+        socket: UdpSocket,
+        pub reply_buf: [u8; 4096],
+    }
+
+    impl SimUdpTestClient {
+        pub fn new(
+            server_addr: &SocketAddr,
+            non_blocking: bool,
+            read_timeot_ms: Option<u64>,
+        ) -> std::io::Result<Self> {
+            let socket = UdpSocket::bind("127.0.0.1:0")?;
+            socket.set_nonblocking(non_blocking)?;
+            socket
+                .connect(server_addr)
+                .expect("could not connect to server addr");
+            if let Some(read_timeout) = read_timeot_ms {
+                // Set a read timeout so the test does not hang on failures.
+                socket.set_read_timeout(Some(Duration::from_millis(read_timeout)))?;
+            }
+            Ok(Self {
+                socket,
+                reply_buf: [0; 4096],
+            })
+        }
+
+        pub fn send_request(&self, sim_request: &SimRequest) -> std::io::Result<usize> {
+            self.socket.send(
+                &serde_json::to_vec(sim_request).expect("conversion of request to vector failed"),
+            )
+        }
+
+        pub fn recv_raw(&mut self) -> std::io::Result<usize> {
+            self.socket.recv(&mut self.reply_buf)
+        }
+
+        pub fn recv_sim_reply(&mut self) -> Result<SimReply, ReceptionError> {
+            let read_len = self.recv_raw()?;
+            Ok(serde_json::from_slice(&self.reply_buf[0..read_len])?)
+        }
+    }
     struct UdpTestbench {
-        client: SimUdpClient,
+        client: SimUdpTestClient,
         stop_signal: Arc<AtomicBool>,
         request_receiver: mpsc::Receiver<SimRequest>,
         reply_sender: mpsc::Sender<SimReply>,
@@ -197,7 +246,7 @@ mod tests {
             let server_addr = server.server_addr()?;
             Ok((
                 Self {
-                    client: SimUdpClient::new(
+                    client: SimUdpTestClient::new(
                         &server_addr,
                         client_non_blocking,
                         client_read_timeout_ms,
@@ -295,7 +344,7 @@ mod tests {
             .send_request(&SimRequest::new_with_epoch_time(SimCtrlRequest::Ping))
             .expect("sending request failed");
 
-        let sim_reply = SimReply::new(PcduReply::SwitchInfo(get_all_off_switch_map()));
+        let sim_reply = SimReply::new(&PcduReply::SwitchInfo(get_all_off_switch_map()));
         udp_testbench.send_reply(&sim_reply);
 
         udp_testbench.check_next_sim_reply(&sim_reply);
@@ -320,7 +369,7 @@ mod tests {
             .expect("sending request failed");
 
         // Send a reply to the server, ensure it gets forwarded to the client.
-        let sim_reply = SimReply::new(PcduReply::SwitchInfo(get_all_off_switch_map()));
+        let sim_reply = SimReply::new(&PcduReply::SwitchInfo(get_all_off_switch_map()));
         udp_testbench.send_reply(&sim_reply);
         std::thread::sleep(Duration::from_millis(SERVER_WAIT_TIME_MS));
 
@@ -339,7 +388,7 @@ mod tests {
         let server_thread = std::thread::spawn(move || udp_server.run());
 
         // Send a reply to the server. The client is not connected, so it won't get forwarded.
-        let sim_reply = SimReply::new(PcduReply::SwitchInfo(get_all_off_switch_map()));
+        let sim_reply = SimReply::new(&PcduReply::SwitchInfo(get_all_off_switch_map()));
         udp_testbench.send_reply(&sim_reply);
         std::thread::sleep(Duration::from_millis(10));
 
@@ -366,7 +415,7 @@ mod tests {
         let server_thread = std::thread::spawn(move || udp_server.run());
 
         // The server only caches up to 3 replies.
-        let sim_reply = SimReply::new(SimCtrlReply::Pong);
+        let sim_reply = SimReply::new(&SimCtrlReply::Pong);
         for _ in 0..4 {
             udp_testbench.send_reply(&sim_reply);
         }

satrs/src/power.rs

@@ -1,22 +1,17 @@
+use core::time::Duration;
+
+use derive_new::new;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "std")]
+#[allow(unused_imports)]
+pub use std_mod::*;
 
-/// Generic trait for a device capable of switching itself on or off.
+use crate::request::MessageMetadata;
-pub trait PowerSwitch {
-    type Error;
-
-    fn switch_on(&mut self) -> Result<(), Self::Error>;
-    fn switch_off(&mut self) -> Result<(), Self::Error>;
-
-    fn is_switch_on(&self) -> bool {
-        self.switch_state() == SwitchState::On
-    }
-
-    fn switch_state(&self) -> SwitchState;
-}
 
 #[derive(Debug, Eq, PartialEq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum SwitchState {
     Off = 0,
     On = 1,
@@ -26,6 +21,7 @@ pub enum SwitchState {
 
 #[derive(Debug, Eq, PartialEq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum SwitchStateBinary {
     Off = 0,
     On = 1,
@@ -63,76 +59,254 @@ impl From<SwitchStateBinary> for SwitchState {
 pub type SwitchId = u16;
 
 /// Generic trait for a device capable of turning on and off switches.
-pub trait PowerSwitcherCommandSender {
+pub trait PowerSwitcherCommandSender<SwitchType: Into<u16>> {
-    type Error;
+    type Error: core::fmt::Debug;
 
-    fn send_switch_on_cmd(&mut self, switch_id: SwitchId) -> Result<(), Self::Error>;
+    fn send_switch_on_cmd(
-    fn send_switch_off_cmd(&mut self, switch_id: SwitchId) -> Result<(), Self::Error>;
+        &self,
+        requestor_info: MessageMetadata,
+        switch_id: SwitchType,
+    ) -> Result<(), Self::Error>;
+    fn send_switch_off_cmd(
+        &self,
+        requestor_info: MessageMetadata,
+        switch_id: SwitchType,
+    ) -> Result<(), Self::Error>;
 }
 
-pub trait PowerSwitchInfo {
+pub trait PowerSwitchInfo<SwitchType> {
-    type Error;
+    type Error: core::fmt::Debug;
 
     /// Retrieve the switch state
-    fn get_switch_state(&mut self, switch_id: SwitchId) -> Result<SwitchState, Self::Error>;
+    fn switch_state(&self, switch_id: SwitchType) -> Result<SwitchState, Self::Error>;
 
-    fn get_is_switch_on(&mut self, switch_id: SwitchId) -> Result<bool, Self::Error> {
+    fn is_switch_on(&self, switch_id: SwitchType) -> Result<bool, Self::Error> {
-        Ok(self.get_switch_state(switch_id)? == SwitchState::On)
+        Ok(self.switch_state(switch_id)? == SwitchState::On)
     }
 
     /// The maximum delay it will take to change a switch.
     ///
     /// This may take into account the time to send a command, wait for it to be executed, and
     /// see the switch changed.
-    fn switch_delay_ms(&self) -> u32;
+    fn switch_delay_ms(&self) -> Duration;
+}
+
+#[derive(new)]
+pub struct SwitchRequest {
+    switch_id: SwitchId,
+    target_state: SwitchStateBinary,
+}
+
+impl SwitchRequest {
+    pub fn switch_id(&self) -> SwitchId {
+        self.switch_id
+    }
+
+    pub fn target_state(&self) -> SwitchStateBinary {
+        self.target_state
+    }
+}
+
+#[cfg(feature = "std")]
+pub mod std_mod {
+    use std::sync::mpsc;
+
+    use crate::{
+        queue::GenericSendError,
+        request::{GenericMessage, MessageMetadata},
+    };
+
+    use super::*;
+
+    pub type MpscSwitchCmdSender = mpsc::Sender<GenericMessage<SwitchRequest>>;
+    pub type MpscSwitchCmdSenderBounded = mpsc::SyncSender<GenericMessage<SwitchRequest>>;
+
+    impl<SwitchType: Into<u16>> PowerSwitcherCommandSender<SwitchType> for MpscSwitchCmdSender {
+        type Error = GenericSendError;
+
+        fn send_switch_on_cmd(
+            &self,
+            requestor_info: MessageMetadata,
+            switch_id: SwitchType,
+        ) -> Result<(), Self::Error> {
+            self.send(GenericMessage::new(
+                requestor_info,
+                SwitchRequest::new(switch_id.into(), SwitchStateBinary::On),
+            ))
+            .map_err(|_| GenericSendError::RxDisconnected)
+        }
+
+        fn send_switch_off_cmd(
+            &self,
+            requestor_info: MessageMetadata,
+            switch_id: SwitchType,
+        ) -> Result<(), Self::Error> {
+            self.send(GenericMessage::new(
+                requestor_info,
+                SwitchRequest::new(switch_id.into(), SwitchStateBinary::Off),
+            ))
+            .map_err(|_| GenericSendError::RxDisconnected)
+        }
+    }
+
+    impl<SwitchType: Into<u16>> PowerSwitcherCommandSender<SwitchType> for MpscSwitchCmdSenderBounded {
+        type Error = GenericSendError;
+
+        fn send_switch_on_cmd(
+            &self,
+            requestor_info: MessageMetadata,
+            switch_id: SwitchType,
+        ) -> Result<(), Self::Error> {
+            self.try_send(GenericMessage::new(
+                requestor_info,
+                SwitchRequest::new(switch_id.into(), SwitchStateBinary::On),
+            ))
+            .map_err(|e| match e {
+                mpsc::TrySendError::Full(_) => GenericSendError::QueueFull(None),
+                mpsc::TrySendError::Disconnected(_) => GenericSendError::RxDisconnected,
+            })
+        }
+
+        fn send_switch_off_cmd(
+            &self,
+            requestor_info: MessageMetadata,
+            switch_id: SwitchType,
+        ) -> Result<(), Self::Error> {
+            self.try_send(GenericMessage::new(
+                requestor_info,
+                SwitchRequest::new(switch_id.into(), SwitchStateBinary::Off),
+            ))
+            .map_err(|e| match e {
+                mpsc::TrySendError::Full(_) => GenericSendError::QueueFull(None),
+                mpsc::TrySendError::Disconnected(_) => GenericSendError::RxDisconnected,
+            })
+        }
+    }
 }
 
 #[cfg(test)]
 mod tests {
-    #![allow(dead_code)]
+    // TODO: Add unittests for PowerSwitcherCommandSender impls for mpsc.
+
+    use std::sync::mpsc::{self, TryRecvError};
+
+    use crate::{queue::GenericSendError, request::GenericMessage, ComponentId};
+
     use super::*;
-    use std::boxed::Box;
 
-    struct Pcdu {
+    const TEST_REQ_ID: u32 = 2;
-        switch_rx: std::sync::mpsc::Receiver<(SwitchId, u16)>,
+    const TEST_SENDER_ID: ComponentId = 5;
+
+    const TEST_SWITCH_ID: u16 = 0x1ff;
+
+    fn common_checks(request: &GenericMessage<SwitchRequest>) {
+        assert_eq!(request.requestor_info.sender_id(), TEST_SENDER_ID);
+        assert_eq!(request.requestor_info.request_id(), TEST_REQ_ID);
+        assert_eq!(request.message.switch_id(), TEST_SWITCH_ID);
     }
 
-    #[derive(Eq, PartialEq)]
+    #[test]
-    enum DeviceState {
+    fn test_comand_switch_sending_mpsc_regular_on_cmd() {
-        OFF,
+        let (switch_cmd_tx, switch_cmd_rx) = mpsc::channel::<GenericMessage<SwitchRequest>>();
-        SwitchingPower,
+        switch_cmd_tx
-        ON,
+            .send_switch_on_cmd(
-        SETUP,
+                MessageMetadata::new(TEST_REQ_ID, TEST_SENDER_ID),
-        IDLE,
+                TEST_SWITCH_ID,
-    }
+            )
-    struct MyComplexDevice {
+            .expect("sending switch cmd failed");
-        power_switcher: Box<dyn PowerSwitcherCommandSender<Error = ()>>,
+        let request = switch_cmd_rx
-        power_info: Box<dyn PowerSwitchInfo<Error = ()>>,
+            .recv()
-        switch_id: SwitchId,
+            .expect("receiving switch request failed");
-        some_state: u16,
+        common_checks(&request);
-        dev_state: DeviceState,
+        assert_eq!(request.message.target_state(), SwitchStateBinary::On);
-        mode: u32,
-        submode: u16,
     }
 
-    impl MyComplexDevice {
+    #[test]
-        pub fn periodic_op(&mut self) {
+    fn test_comand_switch_sending_mpsc_regular_off_cmd() {
-            // .. mode command coming in
+        let (switch_cmd_tx, switch_cmd_rx) = mpsc::channel::<GenericMessage<SwitchRequest>>();
-            let mode = 1;
+        switch_cmd_tx
-            if mode == 1 {
+            .send_switch_off_cmd(
-                if self.dev_state == DeviceState::OFF {
+                MessageMetadata::new(TEST_REQ_ID, TEST_SENDER_ID),
-                    self.power_switcher
+                TEST_SWITCH_ID,
-                        .send_switch_on_cmd(self.switch_id)
+            )
-                        .expect("sending siwthc cmd failed");
+            .expect("sending switch cmd failed");
-                    self.dev_state = DeviceState::SwitchingPower;
+        let request = switch_cmd_rx
-                }
+            .recv()
-                if self.dev_state == DeviceState::SwitchingPower {
+            .expect("receiving switch request failed");
-                    if self.power_info.get_is_switch_on(0).unwrap() {
+        common_checks(&request);
-                        self.dev_state = DeviceState::ON;
+        assert_eq!(request.message.target_state(), SwitchStateBinary::Off);
-                        self.mode = 1;
+    }
-                    }
+
-                }
+    #[test]
-            }
+    fn test_comand_switch_sending_mpsc_regular_rx_disconnected() {
-        }
+        let (switch_cmd_tx, switch_cmd_rx) = mpsc::channel::<GenericMessage<SwitchRequest>>();
+        drop(switch_cmd_rx);
+        let result = switch_cmd_tx.send_switch_off_cmd(
+            MessageMetadata::new(TEST_REQ_ID, TEST_SENDER_ID),
+            TEST_SWITCH_ID,
+        );
+        assert!(result.is_err());
+        matches!(result.unwrap_err(), GenericSendError::RxDisconnected);
+    }
+
+    #[test]
+    fn test_comand_switch_sending_mpsc_sync_on_cmd() {
+        let (switch_cmd_tx, switch_cmd_rx) = mpsc::sync_channel::<GenericMessage<SwitchRequest>>(3);
+        switch_cmd_tx
+            .send_switch_on_cmd(
+                MessageMetadata::new(TEST_REQ_ID, TEST_SENDER_ID),
+                TEST_SWITCH_ID,
+            )
+            .expect("sending switch cmd failed");
+        let request = switch_cmd_rx
+            .recv()
+            .expect("receiving switch request failed");
+        common_checks(&request);
+        assert_eq!(request.message.target_state(), SwitchStateBinary::On);
+    }
+
+    #[test]
+    fn test_comand_switch_sending_mpsc_sync_off_cmd() {
+        let (switch_cmd_tx, switch_cmd_rx) = mpsc::sync_channel::<GenericMessage<SwitchRequest>>(3);
+        switch_cmd_tx
+            .send_switch_off_cmd(
+                MessageMetadata::new(TEST_REQ_ID, TEST_SENDER_ID),
+                TEST_SWITCH_ID,
+            )
+            .expect("sending switch cmd failed");
+        let request = switch_cmd_rx
+            .recv()
+            .expect("receiving switch request failed");
+        common_checks(&request);
+        assert_eq!(request.message.target_state(), SwitchStateBinary::Off);
+    }
+
+    #[test]
+    fn test_comand_switch_sending_mpsc_sync_rx_disconnected() {
+        let (switch_cmd_tx, switch_cmd_rx) = mpsc::sync_channel::<GenericMessage<SwitchRequest>>(1);
+        drop(switch_cmd_rx);
+        let result = switch_cmd_tx.send_switch_off_cmd(
+            MessageMetadata::new(TEST_REQ_ID, TEST_SENDER_ID),
+            TEST_SWITCH_ID,
+        );
+        assert!(result.is_err());
+        matches!(result.unwrap_err(), GenericSendError::RxDisconnected);
+    }
+
+    #[test]
+    fn test_comand_switch_sending_mpsc_sync_queue_full() {
+        let (switch_cmd_tx, switch_cmd_rx) = mpsc::sync_channel::<GenericMessage<SwitchRequest>>(1);
+        let mut result = switch_cmd_tx.send_switch_off_cmd(
+            MessageMetadata::new(TEST_REQ_ID, TEST_SENDER_ID),
+            TEST_SWITCH_ID,
+        );
+        assert!(result.is_ok());
+        result = switch_cmd_tx.send_switch_off_cmd(
+            MessageMetadata::new(TEST_REQ_ID, TEST_SENDER_ID),
+            TEST_SWITCH_ID,
+        );
+        assert!(result.is_err());
+        matches!(result.unwrap_err(), GenericSendError::QueueFull(None));
+        matches!(switch_cmd_rx.try_recv(), Err(TryRecvError::Empty));
     }
 }

serialization-prototyping/.gitignore

@@ -0,0 +1 @@
+/target

serialization-prototyping/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "msg-pack-test"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+satrs-minisim = { version = "0.1", path = "../satrs-minisim" }
+satrs = { version = "0.2", path = "../satrs" }
+rmp-serde = "1"
+rmpv = { version = "1", features = ["with-serde"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1"

serialization-prototyping/python-test/.gitignore

@@ -0,0 +1 @@
+/venv

serialization-prototyping/python-test/main.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+import enum
+from socket import AF_INET, SOCK_DGRAM, socket
+from pydantic import BaseModel
+import msgpack
+
+
+TEST_PERSON = {
+    "age": 24,
+    "name": "Nadine",
+}
+
+
+class Devices(str, enum.Enum):
+    MGT = "Mgt"
+    MGM = "Mgm"
+
+
+class SwitchState(str, enum.Enum):
+    OFF = "Off"
+    ON = "On"
+    UNKNOWN = "Unknown"
+    FAULTY = "Faulty"
+
+
+class SwitchMap(BaseModel):
+    valid: bool
+    switch_map: dict[Devices, SwitchState]
+
+
+def msg_pack_unloading(recv_back: bytes):
+    unpacked = msgpack.unpackb(recv_back)
+    print(f"unpacked: {unpacked}")
+    loaded_back = msgpack.loads(recv_back)
+    print(loaded_back)
+
+
+def main():
+    server_socket = socket(AF_INET, SOCK_DGRAM)
+    target_address = "localhost", 7301
+    msg_pack_stuff = msgpack.packb(TEST_PERSON)
+    assert msg_pack_stuff is not None
+    _ = server_socket.sendto(msg_pack_stuff, target_address)
+    recv_back = server_socket.recv(4096)
+    print(f"recv back: {recv_back}")
+    switch_map = SwitchMap.model_validate_json(recv_back)
+    print(f"switch map: {switch_map}")
+
+
+if __name__ == "__main__":
+    main()

serialization-prototyping/python-test/requirements.txt

@@ -0,0 +1,2 @@
+msgpack==1.0.8
+pydantic==2.7

serialization-prototyping/src/archive.rs

@@ -0,0 +1,88 @@
+#[derive(Debug, Clone, Copy, PartialEq, Deserialize, Serialize)]
+pub enum Color {
+    Red = 0,
+    Green = 1,
+}
+
+#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
+struct Human {
+    age: u16,
+    name: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
+struct HumanAdvanced {
+    id: u32,
+    age: u16,
+    name: String,
+    fav_color: Color,
+}
+
+#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
+struct HumanGroup {
+    humans: Vec<HumanAdvanced>,
+    bank: HashMap<u32, usize>,
+}
+
+
+#[allow(dead_code)]
+fn random_testing() {
+    let mut buf = Vec::new();
+    let john = HumanAdvanced {
+        id: 0,
+        age: 42,
+        name: "John".into(),
+        fav_color: Color::Green,
+    };
+
+    john.serialize(&mut Serializer::new(&mut buf)).unwrap();
+
+    println!("{:?}", buf);
+    let new_val: HumanAdvanced = rmp_serde::from_slice(&buf).expect("deserialization failed");
+    let rmpv_val: rmpv::Value = rmp_serde::from_slice(&buf).expect("serialization into val failed");
+    println!("RMPV value: {:?}", rmpv_val);
+    let json_str = serde_json::to_string(&rmpv_val).expect("creating json failed");
+    assert_eq!(john, new_val);
+    println!("JSON str: {}", json_str);
+    let val_test: HumanAdvanced = serde_json::from_str(&json_str).expect("wild");
+    println!("val test: {:?}", val_test);
+
+    let nadine = HumanAdvanced {
+        id: 1,
+        age: 24,
+        name: "Nadine".into(),
+        fav_color: Color::Red,
+    };
+    let mut bank = HashMap::default();
+    bank.insert(john.id, 1000000);
+    bank.insert(nadine.id, 1);
+
+    let human_group = HumanGroup {
+        humans: vec![john, nadine.clone()],
+        bank,
+    };
+    let json_str = serde_json::to_string(&nadine).unwrap();
+    println!("Nadine as JSON: {}", json_str);
+
+    let nadine_is_back: HumanAdvanced = serde_json::from_str(&json_str).unwrap();
+    println!("nadine deserialized: {:?}", nadine_is_back);
+
+    let human_group_json = serde_json::to_string(&human_group).unwrap();
+    println!("human group: {}", human_group_json);
+    println!("human group json size: {}", human_group_json.len());
+
+    let human_group_rmp_vec = rmp_serde::to_vec_named(&human_group_json).unwrap();
+    println!("human group msg pack size: {:?}", human_group_rmp_vec.len());
+}
+
+#[allow(dead_code)]
+fn send_back_weird_stuff(buf: &[u8], received: usize, socket: &UdpSocket, src: SocketAddr) {
+    let human_from_python: rmpv::Value = rmp_serde::from_slice(&buf[..received]).expect("blablah");
+    let human_attempt_2: Human = rmp_serde::from_slice(&buf[..received]).expect("blhfwhfw");
+    println!("human from python: {}", human_from_python);
+    println!("human 2 from python: {:?}", human_attempt_2);
+    let send_back_human = rmp_serde::to_vec_named(&human_attempt_2).expect("k32k323k2");
+    socket
+        .send_to(&send_back_human, src)
+        .expect("sending back failed");
+}

serialization-prototyping/src/main.rs

@@ -0,0 +1,61 @@
+#![allow(unused_imports)]
+use rmp_serde::{Deserializer, Serializer};
+use satrs_minisim::eps::{SwitchMap, SwitchMapWrapper};
+use serde::{Deserialize, Serialize};
+use std::{
+    collections::HashMap,
+    net::{SocketAddr, UdpSocket},
+};
+
+#[derive(Clone, PartialEq, Eq, Default, Serialize, Deserialize)]
+pub struct SwitchSet {
+    pub valid: bool,
+    pub switch_map: SwitchMap,
+}
+
+pub struct UdpServer {
+    socket: UdpSocket,
+    last_sender: Option<SocketAddr>,
+}
+
+impl Default for UdpServer {
+    fn default() -> Self {
+        UdpServer {
+            socket: UdpSocket::bind("127.0.0.1:7301").expect("binding UDP socket failed"),
+            last_sender: Default::default(),
+        }
+    }
+}
+
+impl UdpServer {
+    pub fn send_back_reply(&self, reply: &[u8]) {
+        self.socket
+            .send_to(reply, self.last_sender.expect("last sender not set"))
+            .expect("sending back failed");
+    }
+}
+
+fn main() {
+    let mut udp_server = UdpServer::default();
+
+    loop {
+        // Receives a single datagram message on the socket. If `buf` is too small to hold
+        // the message, it will be cut off.
+        let mut buf = [0; 4096];
+        let (received, src) = udp_server
+            .socket
+            .recv_from(&mut buf)
+            .expect("receive call failed");
+        udp_server.last_sender = Some(src);
+        println!("received {} bytes from {:?}", received, src);
+        let switch_map_off = SwitchMapWrapper::default();
+        let switch_set = SwitchSet {
+            valid: true,
+            switch_map: switch_map_off.0.clone(),
+        };
+        let switch_map_off_json =
+            serde_json::to_string(&switch_set).expect("json serialization failed");
+        println!("sending back reply: {}", switch_map_off_json);
+        udp_server.send_back_reply(switch_map_off_json.as_bytes());
+    }
+}