diff --git a/DCCTimerSTM32.cpp b/DCCTimerSTM32.cpp
index f2d51ff..f24adc2 100644
--- a/DCCTimerSTM32.cpp
+++ b/DCCTimerSTM32.cpp
@@ -50,11 +50,16 @@ HardwareSerial Serial6(PA12, PA11);  // Rx=PA12, Tx=PA11 -- CN10 pins 12 and 14
 // via the debugger on the Nucleo-64. It is therefore unavailable for other DCC-EX uses like WiFi, DFPlayer, etc.
 // On the F446RE, Serial3 and Serial5 are easy to use:
 HardwareSerial Serial3(PC11, PC10);  // Rx=PC11, Tx=PC10 -- USART3 - F446RE
-HardwareSerial Serial5(PD2, PC12);  // Rx=PC7, Tx=PC6 -- UART5 - F446RE
+HardwareSerial Serial5(PD2, PC12);  // Rx=PD2, Tx=PC12 -- UART5 - F446RE
 // On the F446RE, Serial4 and Serial6 also use pins we can't readily map while using the Arduino pins
-#elif defined(ARDUINO_NUCLEO_F412ZG) || defined(ARDUINO_NUCLEO_F413ZH) || defined(ARDUINO_NUCLEO_F429ZI) || defined(ARDUINO_NUCLEO_F446ZE) 
+#elif defined(ARDUINO_NUCLEO_F412ZG) || defined(ARDUINO_NUCLEO_F413ZH) || defined(ARDUINO_NUCLEO_F446ZE) || \
+      defined(ARDUINO_NUCLEO_F429ZI) || defined(ARDUINO_NUCLEO_F439ZI)
 // Nucleo-144 boards don't have Serial1 defined by default
 HardwareSerial Serial6(PG9, PG14);  // Rx=PG9, Tx=PG14 -- USART6
+HardwareSerial Serial5(PD2, PC12);  // Rx=PD2, Tx=PC12 -- UART5
+#if !defined(ARDUINO_NUCLEO_F412ZG)
+  HardwareSerial Serial2(PD6, PD5);  // Rx=PD6, Tx=PD5 -- UART5
+#endif  
 // Serial3 is defined to use USART3 by default, but is in fact used as the diag console
 // via the debugger on the Nucleo-144. It is therefore unavailable for other DCC-EX uses like WiFi, DFPlayer, etc.
 #else
@@ -215,9 +220,9 @@ void DCCTimer::clearPWM() {
 }
 
 void   DCCTimer::getSimulatedMacAddress(byte mac[6]) {
-  volatile uint32_t *serno1 = (volatile uint32_t *)0x1FFF7A10;
-  volatile uint32_t *serno2 = (volatile uint32_t *)0x1FFF7A14;
-  // volatile uint32_t *serno3 = (volatile uint32_t *)0x1FFF7A18;
+  volatile uint32_t *serno1 = (volatile uint32_t *)UID_BASE;
+  volatile uint32_t *serno2 = (volatile uint32_t *)UID_BASE+4;
+  // volatile uint32_t *serno3 = (volatile uint32_t *)UID_BASE+8;
 
   volatile uint32_t m1 = *serno1;
   volatile uint32_t m2 = *serno2;
diff --git a/WifiESP32.cpp b/WifiESP32.cpp
index 28a15fe..f0a857f 100644
--- a/WifiESP32.cpp
+++ b/WifiESP32.cpp
@@ -163,7 +163,9 @@ bool WifiESP::setup(const char *SSid,
       delay(500);
     }
     if (WiFi.status() == WL_CONNECTED) {
-      DIAG(F("Wifi STA IP %s"),WiFi.localIP().toString().c_str());
+      // DIAG(F("Wifi STA IP %s"),WiFi.localIP().toString().c_str());
+      DIAG(F("Wifi in STA mode"));
+      LCD(7, F("IP: %s"), WiFi.softAPIP().toString().c_str());
       wifiUp = true;
     } else {
       DIAG(F("Could not connect to Wifi SSID %s"),SSid);
@@ -209,8 +211,12 @@ bool WifiESP::setup(const char *SSid,
     if (WiFi.softAP(strSSID.c_str(),
 		    havePassword ? password : strPass.c_str(),
 		    channel, false, 8)) {
-      DIAG(F("Wifi AP SSID %s PASS %s"),strSSID.c_str(),havePassword ? password : strPass.c_str());
-      DIAG(F("Wifi AP IP %s"),WiFi.softAPIP().toString().c_str());
+      // DIAG(F("Wifi AP SSID %s PASS %s"),strSSID.c_str(),havePassword ? password : strPass.c_str());
+      DIAG(F("Wifi in AP mode"));
+      LCD(5, F("Wifi: %s"), strSSID.c_str());
+      LCD(6, F("PASS: %s"),havePassword ? password : strPass.c_str());
+      // DIAG(F("Wifi AP IP %s"),WiFi.softAPIP().toString().c_str());
+      LCD(7, F("IP: %s"),WiFi.softAPIP().toString().c_str());
       wifiUp = true;
       APmode = true;
     } else {
diff --git a/version.h b/version.h
index e8a5e81..a0cb16a 100644
--- a/version.h
+++ b/version.h
@@ -3,7 +3,10 @@
 
 #include "StringFormatter.h"
 
-#define VERSION "5.2.11"
+#define VERSION "5.2.12"
+// 5.2.12 - ESP32 add AP mode LCD messages with SSID/PW for
+//        - STM32 change to UID_BASE constants in DCCTimerSTM32 rather than raw hex addresses for UID registers
+//        - STM32 extra UART/USARTs for larger Nucleo models
 // 5.2.11 - Change from TrackManager::returnMode to TrackManager::getMode
 // 5.2.10 - Include trainbrains.eu block unoccupancy driver
 //        - include IO_PCA9555