diff --git a/tools/esp8266/config.h b/tools/esp8266/config.h
index d33865c1..e6a019f5 100644
--- a/tools/esp8266/config.h
+++ b/tools/esp8266/config.h
@@ -45,9 +45,6 @@
 #define DEF_RF24_CE_PIN         2
 #define DEF_RF24_IRQ_PIN        0
 
-/// default radio ID (the ending 01ULL NEEDS to remain unmodified!)
-#define DTU_RADIO_ID            ((uint64_t)0x1234567801ULL)
-
 // default NRF24 power, possible values (0 - 3)
 #define DEF_AMPLIFIERPOWER      1
 
diff --git a/tools/esp8266/config_override_example.h b/tools/esp8266/config_override_example.h
index 304a88f4..5fa73f3d 100644
--- a/tools/esp8266/config_override_example.h
+++ b/tools/esp8266/config_override_example.h
@@ -24,8 +24,4 @@
 #undef DEF_RF24_IRQ_PIN
 #define DEF_RF24_IRQ_PIN        16
 
-// default radio ID (the ending 01ULL NEEDS to remain unmodified!)
-#undef DTU_RADIO_ID
-#define DTU_RADIO_ID            ((uint64_t)0x1234567901ULL)
-
 #endif /*__CONFIG_OVERRIDE_H__*/
diff --git a/tools/esp8266/hmRadio.h b/tools/esp8266/hmRadio.h
index a41d738b..72cebb58 100644
--- a/tools/esp8266/hmRadio.h
+++ b/tools/esp8266/hmRadio.h
@@ -54,7 +54,7 @@ const char* const rf24AmpPowerNames[] = {"MIN", "LOW", "HIGH", "MAX"};
 //-----------------------------------------------------------------------------
 // HM Radio class
 //-----------------------------------------------------------------------------
-template <uint8_t CE_PIN, uint8_t CS_PIN, class BUFFER, uint64_t DTU_ID=DTU_RADIO_ID>
+template <uint8_t CE_PIN, uint8_t CS_PIN, class BUFFER>
 class HmRadio {
     public:
         HmRadio() : mNrf24(CE_PIN, CS_PIN, SPI_SPEED) {
@@ -90,6 +90,24 @@ class HmRadio {
 
             mBufCtrl = ctrl;
             mSerialDebug = config->serialDebug;
+        
+            uint32_t DTU_SN = 0x87654321;
+            uint32_t chipID = 0; // will be filled with last 3 bytes of MAC
+#ifdef ESP32
+            uint64_t MAC = ESP.getEfuseMac();
+            chipID = ((MAC >> 8) & 0xFF0000) | ((MAC >> 24) & 0xFF00) | ((MAC >> 40) & 0xFF);
+#else
+            chipID = ESP.getChipId();
+#endif
+            if(chipID) {
+                DTU_SN = 0x80000000; // the first digit is an 8 for DTU production year 2022, the rest is filled with the ESP chipID in decimal
+                for(int i = 0; i < 7; i++) {
+                    DTU_SN |= (chipID % 10) << (i * 4);
+                    chipID /= 10;
+                }
+            }
+            // change the byte order of the DTU serial number and append the required 0x01 at the end
+            DTU_RADIO_ID = ((uint64_t)(((DTU_SN >> 24) & 0xFF) | ((DTU_SN >> 8) & 0xFF00) | ((DTU_SN << 8) & 0xFF0000) | ((DTU_SN << 24) & 0xFF000000)) << 8) | 0x01;
 
             mNrf24.begin(config->pinCe, config->pinCs);
             mNrf24.setRetries(0, 0);
@@ -215,7 +233,7 @@ class HmRadio {
             memset(mTxBuf, 0, MAX_RF_PAYLOAD_SIZE);
             mTxBuf[0] = mid; // message id
             CP_U32_BigEndian(&mTxBuf[1], (invId  >> 8));
-            CP_U32_BigEndian(&mTxBuf[5], (DTU_ID >> 8));
+            CP_U32_BigEndian(&mTxBuf[5], (DTU_RADIO_ID >> 8));
             mTxBuf[9]  = pid;
             if(calcCrc) {
                 mTxBuf[10] = Ahoy::crc8(mTxBuf, 10);
@@ -327,6 +345,8 @@ class HmRadio {
             return mRfChLst[mRxChIdx];
         }
 
+        uint64_t DTU_RADIO_ID;
+
         uint8_t mTxCh;
         uint8_t mTxChIdx;