diff --git a/.gitmodules b/.gitmodules
index 76fb8527..e1ea03a4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,9 +10,6 @@
 [submodule "thirdparty/lwgps"]
 	path = thirdparty/lwgps
 	url = https://github.com/rmspacefish/lwgps.git
-[submodule "thirdparty/arcsec_star_tracker"]
-	path = thirdparty/arcsec_star_tracker
-	url = https://egit.irs.uni-stuttgart.de/eive/arcsec_star_tracker.git
 [submodule "thirdparty/json"]
 	path = thirdparty/json
 	url = https://github.com/nlohmann/json.git
@@ -22,3 +19,6 @@
 [submodule "thirdparty/gomspace-sw"]
 	path = thirdparty/gomspace-sw
 	url = https://egit.irs.uni-stuttgart.de/eive/gomspace-sw.git
+[submodule "thirdparty/sagittactl"]
+	path = thirdparty/sagittactl
+	url = https://egit.irs.uni-stuttgart.de/eive/sagittactl.git
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 731c87d8..7df62f43 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ will consitute of a breaking change warranting a new major release:
 # [unreleased]
 
 - q7s-package: v2.5.0
+- STR firmware was updated to v10.3
 
 ## Fixed
 
@@ -27,6 +28,10 @@ will consitute of a breaking change warranting a new major release:
   like firmware updates.
 - Bugfix for shell command executors in command controller which lead to a crash.
 
+## Changed
+
+- STR `wire` library updated to v10.3. Submodule renamed to `sagittactl`.
+
 ## Added
 
 - Add a way for the MAX31865 RTD handlers to recognize faulty/broken/off sensor devices.
@@ -34,6 +39,7 @@ will consitute of a breaking change warranting a new major release:
 - Allow setting the preferred SD card via the new parameter interface of the core controller
   with domain ID 0 and unque ID 0.
 
+
 # [v1.44.1] 2023-04-12
 
 - eive-tmtc: v2.22.1
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f2ac6db1..71a94ff9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -223,7 +223,7 @@ set(LIB_EIVE_MISSION_PATH mission)
 set(LIB_ETL_PATH ${THIRD_PARTY_FOLDER}/etl)
 set(LIB_CATCH2_PATH ${THIRD_PARTY_FOLDER}/Catch2)
 set(LIB_LWGPS_PATH ${THIRD_PARTY_FOLDER}/lwgps)
-set(LIB_ARCSEC_PATH ${THIRD_PARTY_FOLDER}/arcsec_star_tracker)
+set(LIB_ARCSEC_PATH ${THIRD_PARTY_FOLDER}/sagittactl)
 set(LIB_JSON_PATH ${THIRD_PARTY_FOLDER}/json)
 
 set(FSFW_WARNING_SHADOW_LOCAL_GCC OFF)
diff --git a/linux/acs/CMakeLists.txt b/linux/acs/CMakeLists.txt
index 99cacbc2..5b5b5ac8 100644
--- a/linux/acs/CMakeLists.txt
+++ b/linux/acs/CMakeLists.txt
@@ -1,6 +1,10 @@
-target_sources(
-  ${OBSW_NAME} PUBLIC AcsBoardPolling.cpp ImtqPollingTask.cpp RwPollingTask.cpp
-                      SusPolling.cpp StrComHandler.cpp)
+target_sources(${OBSW_NAME} PUBLIC AcsBoardPolling.cpp ImtqPollingTask.cpp
+                                   RwPollingTask.cpp SusPolling.cpp)
+
+# Dependency on proprietary library
+if(TGT_BSP MATCHES "arm/q7s")
+  target_sources(${OBSW_NAME} PUBLIC StrComHandler.cpp)
+endif()
 
 if(EIVE_BUILD_GPSD_GPS_HANDLER)
   target_sources(${OBSW_NAME} PRIVATE GpsHyperionLinuxController.cpp)
diff --git a/linux/acs/StrComHandler.h b/linux/acs/StrComHandler.h
index 385e8b2e..d8542f26 100644
--- a/linux/acs/StrComHandler.h
+++ b/linux/acs/StrComHandler.h
@@ -11,8 +11,6 @@
 #include "bsp_q7s/fs/SdCardManager.h"
 #endif
 
-#include "arcsec/client/generated/actionreq.h"
-#include "arcsec/common/generated/tmtcstructs.h"
 #include "fsfw/devicehandlers/CookieIF.h"
 #include "fsfw/objectmanager/SystemObject.h"
 #include "fsfw/osal/linux/BinarySemaphore.h"
@@ -20,6 +18,10 @@
 #include "fsfw/tasks/ExecutableObjectIF.h"
 #include "fsfw_hal/linux/serial/SerialComIF.h"
 
+extern "C" {
+#include <sagitta/client/arc_client.h>
+}
+
 /**
  * @brief   Helper class for the star tracker handler to accelerate large data transfers.
  *
diff --git a/mission/acs/str/ArcsecDatalinkLayer.cpp b/mission/acs/str/ArcsecDatalinkLayer.cpp
index 532c12b8..d67f6e75 100644
--- a/mission/acs/str/ArcsecDatalinkLayer.cpp
+++ b/mission/acs/str/ArcsecDatalinkLayer.cpp
@@ -1,4 +1,8 @@
-#include <mission/acs/str/ArcsecDatalinkLayer.h>
+#include "ArcsecDatalinkLayer.h"
+
+extern "C" {
+#include <wire/common/misc.h>
+}
 
 ArcsecDatalinkLayer::ArcsecDatalinkLayer() : decodeRingBuf(BUFFER_LENGTHS, true) { slipInit(); }
 
@@ -18,13 +22,10 @@ ReturnValue_t ArcsecDatalinkLayer::checkRingBufForFrame(const uint8_t** decodedF
       case ARC_DEC_INPROGRESS: {
         break;
       }
-      case ARC_DEC_ERROR_FRAME_SHORT: {
+      case ARC_DEC_ERROR: {
         decodeRingBuf.deleteData(idx);
-        return REPLY_TOO_SHORT;
+        return returnvalue::FAILED;
       }
-      case ARC_DEC_ERROR_CHECKSUM:
-        decodeRingBuf.deleteData(idx);
-        return CRC_FAILURE;
       case ARC_DEC_ASYNC:
       case ARC_DEC_SYNC: {
         // Reset length of SLIP struct for next frame
diff --git a/mission/acs/str/ArcsecDatalinkLayer.h b/mission/acs/str/ArcsecDatalinkLayer.h
index 404d9e52..1453e517 100644
--- a/mission/acs/str/ArcsecDatalinkLayer.h
+++ b/mission/acs/str/ArcsecDatalinkLayer.h
@@ -5,10 +5,13 @@
 #include <fsfw/devicehandlers/CookieIF.h>
 #include <mission/acs/str/strHelpers.h>
 
-#include "arcsec/common/misc.h"
 #include "eive/resultClassIds.h"
 #include "fsfw/returnvalues/returnvalue.h"
 
+extern "C" {
+#include <wire/common/SLIP.h>
+}
+
 /**
  * @brief   Helper class to handle the datalinklayer of replies from the star tracker of arcsec.
  */
diff --git a/mission/acs/str/ArcsecJsonParamBase.cpp b/mission/acs/str/ArcsecJsonParamBase.cpp
index b5dd2150..58c54d30 100644
--- a/mission/acs/str/ArcsecJsonParamBase.cpp
+++ b/mission/acs/str/ArcsecJsonParamBase.cpp
@@ -3,6 +3,10 @@
 
 #include "arcsecJsonKeys.h"
 
+extern "C" {
+#include <wire/common/genericstructs.h>
+}
+
 ArcsecJsonParamBase::ArcsecJsonParamBase(std::string setName) : setName(setName) {}
 
 ReturnValue_t ArcsecJsonParamBase::create(uint8_t* buffer) {
diff --git a/mission/acs/str/ArcsecJsonParamBase.h b/mission/acs/str/ArcsecJsonParamBase.h
index 90c54f45..4c4a7a90 100644
--- a/mission/acs/str/ArcsecJsonParamBase.h
+++ b/mission/acs/str/ArcsecJsonParamBase.h
@@ -7,8 +7,6 @@
 #include <fstream>
 #include <nlohmann/json.hpp>
 
-#include "arcsec/common/generated/tmtcstructs.h"
-#include "arcsec/common/genericstructs.h"
 #include "eive/resultClassIds.h"
 #include "fsfw/returnvalues/returnvalue.h"
 
diff --git a/mission/acs/str/StarTrackerHandler.cpp b/mission/acs/str/StarTrackerHandler.cpp
index 3837d9e5..54af25da 100644
--- a/mission/acs/str/StarTrackerHandler.cpp
+++ b/mission/acs/str/StarTrackerHandler.cpp
@@ -1,18 +1,18 @@
-#include <arcsec/client/generated/actionreq.h>
-#include <arcsec/client/generated/parameter.h>
-#include <arcsec/client/generated/telemetry.h>
 #include <fsfw/ipc/QueueFactory.h>
 #include <fsfw/timemanager/Stopwatch.h>
 #include <mission/acs/str/StarTrackerHandler.h>
 #include <mission/acs/str/strHelpers.h>
 #include <mission/acs/str/strJsonCommands.h>
 
+extern "C" {
+#include <sagitta/client/arc_client.h>
+}
+
 #include <atomic>
 #include <fstream>
 #include <thread>
 
 #include "OBSWConfig.h"
-#include "arcsec/common/misc.h"
 
 std::atomic_bool JCFG_DONE(false);
 
diff --git a/mission/acs/str/StarTrackerHandler.h b/mission/acs/str/StarTrackerHandler.h
index f143a660..ea46cb43 100644
--- a/mission/acs/str/StarTrackerHandler.h
+++ b/mission/acs/str/StarTrackerHandler.h
@@ -10,12 +10,15 @@
 #include <thread>
 
 #include "OBSWConfig.h"
-#include "arcsec/common/SLIP.h"
 #include "devices/powerSwitcherList.h"
 #include "fsfw/devicehandlers/DeviceHandlerBase.h"
 #include "fsfw/src/fsfw/serialize/SerializeAdapter.h"
 #include "fsfw/timemanager/Countdown.h"
 
+extern "C" {
+#include <wire/common/SLIP.h>
+}
+
 /**
  * @brief	This is the device handler for the star tracker from arcsec.
  *
diff --git a/thirdparty/CMakeLists.txt b/thirdparty/CMakeLists.txt
index e300cd11..3a5110c9 100644
--- a/thirdparty/CMakeLists.txt
+++ b/thirdparty/CMakeLists.txt
@@ -4,7 +4,8 @@ endif()
 
 # Dependency on proprietary library
 if(TGT_BSP MATCHES "arm/q7s")
-	add_subdirectory(arcsec_star_tracker)
+    # Only add required folder for wire library.
+	add_subdirectory(sagittactl/wire)
 endif()
 
 add_subdirectory(rapidcsv)
diff --git a/thirdparty/arcsec_star_tracker b/thirdparty/arcsec_star_tracker
deleted file mode 160000
index 2823952e..00000000
--- a/thirdparty/arcsec_star_tracker
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 2823952e0902726e6e35dd7c159761f76bf7e505
diff --git a/thirdparty/sagittactl b/thirdparty/sagittactl
new file mode 160000
index 00000000..64332216
--- /dev/null
+++ b/thirdparty/sagittactl
@@ -0,0 +1 @@
+Subproject commit 64332216c193fa6483258060b53fc2842c08dcf4