diff --git a/SerialPort.cpp b/SerialPort.cpp
index 99fa62e..23990cc 100644
--- a/SerialPort.cpp
+++ b/SerialPort.cpp
@@ -92,7 +92,7 @@ const uint8_t MMDVM_DEBUG5       = 0xF5U;
 #endif
 
 #if defined(STM32F4_RPT_HAT_TGO)
-#define HW_TYPE "MMDVM_RPT_HAT_TGO"
+#define HW_TYPE "MMDVM RPT_HAT_TGO"
 #else
 #define HW_TYPE "MMDVM"
 #endif
@@ -109,6 +109,7 @@ const char HARDWARE[] = concat(HW_TYPE, DESCRIPTION, TCXO, __TIME__, __DATE__);
 
 const uint8_t PROTOCOL_VERSION   = 1U;
 
+char UDID[] = "00000000000000000000000000000000";
 
 CSerialPort::CSerialPort() :
 m_buffer(),
@@ -237,7 +238,7 @@ void CSerialPort::getStatus()
 
 void CSerialPort::getVersion()
 {
-  uint8_t reply[150U];
+  uint8_t reply[192U];
 
   reply[0U] = MMDVM_FRAME_START;
   reply[1U] = 0U;
@@ -249,6 +250,10 @@ void CSerialPort::getVersion()
   for (uint8_t i = 0U; HARDWARE[i] != 0x00U; i++, count++)
     reply[count] = HARDWARE[i];
 
+  reply[count++] = '\0';
+  for (uint8_t i = 0U; UDID[i] != 0x00U; i++, count++)
+    reply[count] = UDID[i];
+
   reply[1U] = count;
 
   writeInt(1U, reply, count);
diff --git a/SerialSTM.cpp b/SerialSTM.cpp
index 8b4ae52..1d79311 100644
--- a/SerialSTM.cpp
+++ b/SerialSTM.cpp
@@ -834,9 +834,25 @@ void WriteUART5(const uint8_t* data, uint16_t length)
 
 #endif
 /////////////////////////////////////////////////////////////////
+extern char UDID[];
+extern "C" {
+   #include <stdio.h>
+}
 
 void CSerialPort::beginInt(uint8_t n, int speed)
 {
+#if defined(STM32F4XX)
+   uint32_t *id0 =  (uint32_t *) (0x1FFF7A10);
+   uint32_t *id1 =  (uint32_t *) (0x1FFF7A10 + 0x04);
+   uint32_t *id2 =  (uint32_t *) (0x1FFF7A10 + 0x08);
+   ::sprintf(UDID, "%08X%08X%08X", *id0,*id1,*id2);
+#elif defined(STM32F7XX)
+   uint32_t *id0 =  (uint32_t *) (0x1FF0F420);
+   uint32_t *id1 =  (uint32_t *) (0x1FF0F420 + 0x04);
+   uint32_t *id2 =  (uint32_t *) (0x1FF0F420 + 0x08);
+   ::sprintf(UDID, "%08X%08X%08X", *id0,*id1,*id2);
+#endif
+
    switch (n) {
       case 1U:
          #if defined(STM32F4_DISCOVERY) || defined(STM32F7_NUCLEO)
diff --git a/SerialSTM_CMSIS.cpp b/SerialSTM_CMSIS.cpp
index 38127ac..b7f4399 100644
--- a/SerialSTM_CMSIS.cpp
+++ b/SerialSTM_CMSIS.cpp
@@ -106,9 +106,21 @@ RAMFUNC void USART1TxData(const uint8_t* data, uint16_t length)
 
 
 /////////////////////////////////////////////////////////////////
+extern char UDID[];
+extern "C" {
+  #include <stdio.h>
+}
 
 void CSerialPort::beginInt(uint8_t n, int speed)
 {
+#if defined(STM32F105xC)
+   uint16_t *id00 =  (uint16_t *) (0x1FFFF7E8);
+   uint16_t *id01 =  (uint16_t *) (0x1FFFF7E8 + 0x02);
+   uint32_t *id1 =  (uint32_t *) (0x1FFFF7E8 + 0x04);
+   uint32_t *id2 =  (uint32_t *) (0x1FFFF7E8 + 0x08);
+   ::sprintf(UDID, "%04X%04X%08X%08X", *id00,*id01,*id1,*id2);
+#endif
+
   switch (n) {
     case 1U:
       USART1Init(speed);