diff --git a/etl b/etl
index 1ac3b77e..ae06e641 160000
--- a/etl
+++ b/etl
@@ -1 +1 @@
-Subproject commit 1ac3b77ef40aa783024d15185ee8ff41ae04a73e
+Subproject commit ae06e6417702b770c49289c9e7162cb3f4a5a217
diff --git a/fsfw b/fsfw
index e994d81e..7d0916a4 160000
--- a/fsfw
+++ b/fsfw
@@ -1 +1 @@
-Subproject commit e994d81e1862fade52b090311b3978fb59061966
+Subproject commit 7d0916a44e18c87b00998448333023186b3d85b1
diff --git a/mission/devices/SyrlinksHkHandler.cpp b/mission/devices/SyrlinksHkHandler.cpp
index 60dc439c..ec83e10b 100644
--- a/mission/devices/SyrlinksHkHandler.cpp
+++ b/mission/devices/SyrlinksHkHandler.cpp
@@ -184,6 +184,19 @@ std::string SyrlinksHkHandler::convertIntToHexString(uint16_t intValue) {
     return stream.str();
 }
 
+uint8_t SyrlinksHkHandler::convertHexStringToUint8(char* twoChars) {
+    uint8_t value;
+    std::string hexString(twoChars, 2);
+    std::stringstream stream;
+    stream << std::hex << hexString;
+    stream >> value;
+    return value;
+}
+
+uint16_t convertHexStringToUint16(char* fourChars) {
+
+}
+
 ReturnValue_t SyrlinksHkHandler::parseReplyStatus(const char* status) {
     switch (*status) {
     case '0':
diff --git a/mission/devices/SyrlinksHkHandler.h b/mission/devices/SyrlinksHkHandler.h
index 23a48c13..692be563 100644
--- a/mission/devices/SyrlinksHkHandler.h
+++ b/mission/devices/SyrlinksHkHandler.h
@@ -80,12 +80,32 @@ private:
 	/**
 	 * @brief   This function converts an uint16_t into its hexadecimal string representation.
      *
-	 * @param   The value to convert.
+	 * @param intValue  The value to convert.
 	 *
 	 * @return  An std::string object containing the hex representation of intValue.
 	 */
 	std::string convertIntToHexString(uint16_t intValue);
 
+	/**
+	 * @brief   This function converts a hex number represented by to chars to an 8-bit integer.
+	 *
+	 * @param twoChars    Pointer to the two characters representing the hex value.
+	 *
+	 * @details E.g. when twoChars points to an array with the two characters "A5" then the function
+	 *          will return 0xA5.
+	 * @return  The converted integer.
+	 */
+	uint8_t convertHexStringToUint8(char* twoChars);
+
+	/**
+	 * @brief   This function converts a hex number represented by 4 chars to an uint16_t.
+	 *
+	 * @param   Pointer to the fourCharacters representing the 16-bit integer.
+	 *
+	 * @return  The uint16_t result.
+	 */
+	uint16_t convertHexStringToUint16(char* fourChars);
+
 	/**
 	 * @brief   This function parses the status reply
 	 * @param status    Pointer to the status information.
diff --git a/tmtc b/tmtc
index 50c6752b..1d5fe4eb 160000
--- a/tmtc
+++ b/tmtc
@@ -1 +1 @@
-Subproject commit 50c6752b324c080c9adc3f14e2072d575549c90d
+Subproject commit 1d5fe4ebc7165c2a4979c5f9be9cfa0324e366fb