diff --git a/config/obsw_config.py b/config/obsw_config.py
index db122b02ed89247983fbb65ea1fd40edac256b56..6b9ebc476b96ff9e0960a1a160456826cd4bce39 100644
--- a/config/obsw_config.py
+++ b/config/obsw_config.py
@@ -19,9 +19,10 @@ Mission/Device specific information.
 # TODO: Automate / Autofill this file with the MIB parser
 
 # Object IDs
-GPS0_ObjectId = bytearray([0x44, 0x10, 0x1F, 0x00])
-GPS1_ObjectId = bytearray([0x44, 0x20, 0x20, 0x00])
+GPS0_DEVICE_ID = bytearray([0x44, 0x10, 0x1F, 0x00])
+GPS1_DEVICE_ID = bytearray([0x44, 0x20, 0x20, 0x00])
 DUMMY_DEVICE_ID = bytearray([0x44, 0x00, 0xAF, 0xFE])
+SD_CARD_HANDLER_ID = bytearray([0x4D, 0x00, 0x73, 0xAD])
 
 # Commands
 DUMMY_COMMAND_1 = struct.pack(">I", 666)
diff --git a/tc/obsw_pus_tc_packer.py b/tc/obsw_pus_tc_packer.py
index 26fb866cc7e999b7acc654b79708744ff6d6ac8d..23920defffab2162592f8143a8a002861c3f0126 100644
--- a/tc/obsw_pus_tc_packer.py
+++ b/tc/obsw_pus_tc_packer.py
@@ -55,11 +55,11 @@ class ServiceQueuePacker:
             return pack_dummy_device_test_into(service_queue)
         if service == "GPS0":
             # Object ID: GPS Device
-            object_id = g.GPS0_ObjectId
+            object_id = g.GPS0_DEVICE_ID
             return pack_gps_test_into(object_id, service_queue)
         if service == "GPS1":
             # Object ID: GPS Device
-            object_id = g.GPS1_ObjectId
+            object_id = g.GPS1_DEVICE_ID
             return pack_gps_test_into(object_id, service_queue)
         if service == "Error":
             return pack_error_testing_into(service_queue)
@@ -79,7 +79,7 @@ def create_total_tc_queue() -> TcQueueT:
     tc_queue = pack_service17_test_into(tc_queue)
     tc_queue = pack_service200_test_into(tc_queue)
     tc_queue = pack_dummy_device_test_into(tc_queue)
-    object_id = g.GPS0_ObjectId
+    object_id = g.GPS0_DEVICE_ID
     tc_queue = pack_gps_test_into(object_id, tc_queue)
     return tc_queue
 
diff --git a/tc/obsw_tc_gps.py b/tc/obsw_tc_gps.py
index e7edd53747d5fda55524a80f99c6304ce3021e34..9d9e1eb29cd230694aab8ed3129e640c7eaf2f4f 100644
--- a/tc/obsw_tc_gps.py
+++ b/tc/obsw_tc_gps.py
@@ -12,9 +12,9 @@ from tc.obsw_tc_service2 import pack_mode_data
 import config.obsw_config as g
 
 def pack_gps_test_into(object_id: bytearray, tc_queue: TcQueueT) -> TcQueueT:
-    if object_id == g.GPS0_ObjectId:
+    if object_id == g.GPS0_DEVICE_ID:
         gps_string = "GPS0"
-    elif object_id == g.GPS1_ObjectId:
+    elif object_id == g.GPS1_DEVICE_ID:
         gps_string = "GPS1"
     else:
         gps_string = "unknown"
@@ -31,12 +31,12 @@ def pack_gps_test_into(object_id: bytearray, tc_queue: TcQueueT) -> TcQueueT:
     tc_queue.appendleft(command.pack_command_tuple())
     # Enable HK report
     sid_gps = 0
-    if object_id == g.GPS0_ObjectId:
+    if object_id == g.GPS0_DEVICE_ID:
         sid_gps = g.GPS0_SID
         tc_queue.appendleft(("print", "Testing " + gps_string + ": Enable HK Reporting"))
         command = PusTelecommand(service=3, subservice=5, ssc=13, app_data=sid_gps)
         tc_queue.appendleft(command.pack_command_tuple())
-    elif object_id == g.GPS1_ObjectId:
+    elif object_id == g.GPS1_DEVICE_ID:
         sid_gps = g.GPS1_SID
         tc_queue.appendleft(("print", "Testing " + gps_string + ": Enable HK Reporting"))
         command = PusTelecommand(service=3, subservice=5, ssc=14, app_data=sid_gps)
diff --git a/tc/obsw_tc_service23.py b/tc/obsw_tc_service23.py
index a9bb17bce19b0eec2f9df978db509468ce3356e5..a7ed1a55e5b60cb2ca00cac4852864476b045c48 100644
--- a/tc/obsw_tc_service23.py
+++ b/tc/obsw_tc_service23.py
@@ -5,8 +5,7 @@ Created: 21.01.2020 07:48
 @author: Jakob Meier
 """
 import math
-from collections import deque
-import time
+import config.obsw_config as g
 
 from tc.obsw_pus_tc_packer import TcQueueT, PusTelecommand
 
@@ -15,7 +14,7 @@ class Service23WriteToFile:
     """ This class generates the telecommand packet for the custom PUS service [23, 128]
 
         :param
-            objectID(bytearray): The objectID of the filesystem handler (e.g. SDCardHandler, PLOCHandler)
+            objectID(bytearray): The objectID of the filesystem handler (e.g. SD_CARD_HANDLER_ID, PLOCHandler)
             repositoryPath(str): The directory of the file
             filename(str): The name of the file (e.g. boot.bin)
             fileData(bytearray): The data to write to the file
@@ -243,30 +242,30 @@ def generateService23Subservice129Packet(repositoryPath, filename, objectID=byte
 
 
 def pack_service23_test_into(tcQueue: TcQueueT) -> TcQueueT:
-    SDCardHandler = [0x4D, 0x00, 0x73, 0xAD]
+    sd_handler_id = g.SD_CARD_HANDLER_ID
     tcQueue.appendleft(("print", "Testing Service 23"))
     tcQueue.append(("print", "Create directory 'test'"))
-    command = generateService23Subservice9Packet(directoryName="test", objectID=SDCardHandler)
+    command = generateService23Subservice9Packet(directoryName="test", objectID=sd_handler_id)
     tcQueue.appendleft(command.pack_command_tuple())
     tcQueue.append(("print", "Create subdirectory 'subdir' in 'test'"))
     command = generateService23Subservice9Packet(repositoryPath="test", directoryName="subdir",
-                                                 objectID=SDCardHandler)
+                                                 objectID=sd_handler_id)
     tcQueue.appendleft(command.pack_command_tuple())
     tcQueue.appendleft(("print", "Create and write in test.bin"))
-    command = generateService23Subservice128Packet("test/subdir", "test.bin", SDCardHandler,
-                                         fileData=bytearray([0x01, 0x00, 0x01, 0x00]))
+    command = generateService23Subservice128Packet(
+        "test/subdir", "test.bin", sd_handler_id, fileData=bytearray([0x01, 0x00, 0x01, 0x00]))
     tcQueue.appendleft(command[0].pack_command_tuple())
     tcQueue.appendleft(("print", "Read data of test.bin"))
-    command = generateService23Subservice129Packet("test/subdir", "test.bin", SDCardHandler)
+    command = generateService23Subservice129Packet("test/subdir", "test.bin", sd_handler_id)
     tcQueue.appendleft(command.pack_command_tuple())
     tcQueue.appendleft(("print", "Delete 'test.bin'"))
-    command = generateService23Subservice2Packet("test.bin", "test/subdir", objectID=SDCardHandler)
+    command = generateService23Subservice2Packet("test.bin", "test/subdir", objectID=sd_handler_id)
     tcQueue.appendleft(command.pack_command_tuple())
     tcQueue.appendleft(("print", "Delete 'subdir' directory"))
-    command = generateService23Subservice10Packet("subdir", "test", objectID=SDCardHandler)
+    command = generateService23Subservice10Packet("subdir", "test", objectID=sd_handler_id)
     tcQueue.appendleft(command.pack_command_tuple())
     tcQueue.appendleft(("print", "Delete 'test' directory"))
-    command = generateService23Subservice10Packet(dirname="test", objectID=SDCardHandler)
+    command = generateService23Subservice10Packet(dirname="test", objectID=sd_handler_id)
     tcQueue.appendleft(command.pack_command_tuple())
     tcQueue.appendleft(("print", "\r"))
     return tcQueue
\ No newline at end of file