diff --git a/eive_tmtc/tmtc/acs/star_tracker.py b/eive_tmtc/tmtc/acs/star_tracker.py
index 75102db..9703d36 100644
--- a/eive_tmtc/tmtc/acs/star_tracker.py
+++ b/eive_tmtc/tmtc/acs/star_tracker.py
@@ -21,6 +21,7 @@ from tmtccmd.tc import DefaultPusQueueHelper
 from tmtccmd.tc.pus_200_fsfw_mode import pack_mode_data, Mode
 from tmtccmd.util import ObjectIdU32
 from tmtccmd.util.tmtc_printer import FsfwTmTcPrinter
+from eive_tmtc.config.object_ids import STR_ASSEMBLY, STAR_TRACKER_ID
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -188,6 +189,14 @@ class Submode(enum.IntEnum):
     FIRMWARE = 2
 
 
+def prompt_object_id_mode_cmd() -> bytes:
+    cmd_assy = input("Command Assembly (0) or Device Handler (1) ?: ")
+    if cmd_assy == "0":
+        return STR_ASSEMBLY
+    else:
+        return STAR_TRACKER_ID
+
+
 def pack_star_tracker_commands(
     object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_code: str
 ):
@@ -197,19 +206,19 @@ def pack_star_tracker_commands(
     obyt = object_id.as_bytes
     if op_code == OpCodes.ON_BOOTLOADER:
         q.add_log_cmd("Star tracker: Mode On, Submode Bootloader")
-        data = pack_mode_data(obyt, Mode.ON, Submode.BOOTLOADER)
+        data = pack_mode_data(prompt_object_id_mode_cmd(), Mode.ON, Submode.BOOTLOADER)
         q.add_pus_tc(PusTelecommand(service=200, subservice=1, app_data=data))
     if op_code == OpCodes.ON_FIRMWARE:
         q.add_log_cmd("Star tracker: Mode On, Submode Firmware")
-        data = pack_mode_data(obyt, Mode.ON, Submode.FIRMWARE)
+        data = pack_mode_data(prompt_object_id_mode_cmd(), Mode.ON, Submode.FIRMWARE)
         q.add_pus_tc(PusTelecommand(service=200, subservice=1, app_data=data))
     if op_code == OpCodes.NORMAL:
         q.add_log_cmd("Star tracker: Mode Normal")
-        data = pack_mode_data(obyt, Mode.NORMAL, 0)
+        data = pack_mode_data(prompt_object_id_mode_cmd(), Mode.NORMAL, 0)
         q.add_pus_tc(PusTelecommand(service=200, subservice=1, app_data=data))
     if op_code == OpCodes.OFF:
         q.add_log_cmd("Star tracker: Mode Off")
-        data = pack_mode_data(obyt, Mode.OFF, 0)
+        data = pack_mode_data(prompt_object_id_mode_cmd(), Mode.OFF, 0)
         q.add_pus_tc(PusTelecommand(service=200, subservice=1, app_data=data))
     if op_code == OpCodes.REQUEST_SOLUTION_SET_HK:
         q.add_log_cmd(Info.REQUEST_SOLUTION_SET_HK)
diff --git a/eive_tmtc/tmtc/obj_prompt.py b/eive_tmtc/tmtc/obj_prompt.py
index ef607ca..1324a84 100644
--- a/eive_tmtc/tmtc/obj_prompt.py
+++ b/eive_tmtc/tmtc/obj_prompt.py
@@ -29,7 +29,7 @@ ACS_OBJ_DICT = {
     6: ("GYR 1 L3G", GYRO_1_L3G_HANDLER_ID),
     7: ("MGM 0 LIS3", MGM_0_LIS3_HANDLER_ID),
     8: ("MGM 1 RM3100", MGM_1_RM3100_HANDLER_ID),
-    9: ("GPS 0 Health Device", GPS_0_HEALTH_DEV)
+    9: ("GPS 0 Health Device", GPS_0_HEALTH_DEV),
 }