diff --git a/DCCTimerSTM32.cpp b/DCCTimerSTM32.cpp
index 2cacaff..eb0d365 100644
--- a/DCCTimerSTM32.cpp
+++ b/DCCTimerSTM32.cpp
@@ -1,5 +1,5 @@
 /*
- *  © 2022 Paul M Antoine
+ *  © 2022 Paul M. Antoine
  *  © 2021 Mike S
  *  © 2021 Harald Barth
  *  © 2021 Fred Decker
@@ -37,6 +37,11 @@
 #if defined(STM32F411RE)
 // STM32F411RE doesn't have Serial1 defined by default
 HardwareSerial Serial1(PB7, PA15);  // Rx=PB7, Tx=PA15 -- CN7 pins 17 and 21 - F411RE
+// Serial2 is defined to use USART2 by default, but is in fact used as the diag console
+// via the debugger on the Nucleo-64 STM32F411RE. It is therefore unavailable
+// for other DCC-EX uses like WiFi, DFPlayer, etc.
+// Let's define Serial6 as an additional serial port (the only other option for the F411RE)
+HardwareSerial Serial6(PA12, PA11);  // Rx=PA12, Tx=PA11 -- CN10 pins 12 and 14 - F411RE
 #elif defined(STM32F446ZE)
 // STM32F446ZE doesn't have Serial1 defined by default
 HardwareSerial Serial1(PG9, PG14);  // Rx=PG9, Tx=PG14 -- D0, D1 - F446ZE
@@ -127,4 +132,31 @@ void DCCTimer::reset() {
     while(true) {};
 }
 
+int16_t ADCee::ADCmax() {
+  return 4095;
+}
+
+int ADCee::init(uint8_t pin) {
+  return analogRead(pin);
+}
+/*
+ * Read function ADCee::read(pin) to get value instead of analogRead(pin)
+ */
+int ADCee::read(uint8_t pin, bool fromISR) {
+  int current;
+  if (!fromISR) noInterrupts();
+  current = analogRead(pin);
+  if (!fromISR) interrupts();
+  return current;
+}
+/*
+ * Scan function that is called from interrupt
+ */
+void ADCee::scan() {
+}
+
+void ADCee::begin() {
+  noInterrupts();
+  interrupts();
+}
 #endif
\ No newline at end of file
diff --git a/FSH.h b/FSH.h
index 850311e..ea54554 100644
--- a/FSH.h
+++ b/FSH.h
@@ -1,5 +1,5 @@
 /*
- *  © 2022 Paul M Antoine
+ *  © 2022 Paul M. Antoine
  *  © 2021 Neil McKechnie
  *  © 2021 Harald Barth
  *  © 2021 Fred Decker
@@ -48,10 +48,10 @@ typedef char FSH;
 #define FLASH
 #define strlen_P strlen
 #define strcpy_P strcpy
-#elif defined(ARDUINO_ARCH_STM32)
+#elif defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_STM32)
 typedef __FlashStringHelper FSH;
-#define GETFLASH(addr) pgm_read_byte_near(addr)
-#define GETFLASHW(addr) pgm_read_word_near(addr)
+#define GETFLASH(addr) pgm_read_byte(addr)
+#define GETFLASHW(addr) (*(const unsigned int8_t *)(addr)) | ((*(const unsigned int8_t *)(addr+1)) << 8)
 #ifdef FLASH
   #undef FLASH
 #endif
diff --git a/SerialManager.cpp b/SerialManager.cpp
index 372cc85..0ac567d 100644
--- a/SerialManager.cpp
+++ b/SerialManager.cpp
@@ -1,5 +1,5 @@
  /*
- *  © 2022 Paul M Antoine
+ *  © 2022 Paul M. Antoine
  *  © 2021 Chris Harlow
  *  © 2022 Harald Barth
  *  All rights reserved.
@@ -51,6 +51,18 @@ void SerialManager::init() {
   while (!USB_SERIAL && millis() < 5000); // wait max 5s for Serial to start
   new SerialManager(&USB_SERIAL);
   
+#ifdef SERIAL6_COMMANDS
+  Serial6.begin(115200);
+  new SerialManager(&Serial6);
+#endif
+#ifdef SERIAL5_COMMANDS
+  Serial5.begin(115200);
+  new SerialManager(&Serial5);
+#endif
+#ifdef SERIAL4_COMMANDS
+  Serial4.begin(115200);
+  new SerialManager(&Serial4);
+#endif
 #ifdef SERIAL3_COMMANDS
   Serial3.begin(115200);
   new SerialManager(&Serial3);
diff --git a/config.example.h b/config.example.h
index 8bed4ef..aae18a9 100644
--- a/config.example.h
+++ b/config.example.h
@@ -1,4 +1,5 @@
 /*
+ *  © 2022 Paul M. Antoine
  *  © 2021 Neil McKechnie
  *  © 2020-2021 Harald Barth
  *  © 2020-2021 Fred Decker
@@ -191,14 +192,18 @@ The configuration file for DCC-EX Command Station
 // HANDLING MULTIPLE SERIAL THROTTLES
 // The command station always operates with the default Serial port.
 // Diagnostics are only emitted on the default serial port and not broadcast.
-// Other serial throttles may be added to the Serial1, Serial2, Serial3 ports
-// which may or may not exist on your CPU. (Mega has all 3)
+// Other serial throttles may be added to the Serial1, Serial2, Serial3, Serial4,
+// Serial5, and Serial6 ports which may or may not exist on your CPU. (Mega has 3,
+// SAMD/SAMC and STM32 have up to 6.)
 // To monitor a throttle on one or more serial ports, uncomment the defines below.
 // NOTE: do not define here the WiFi shield serial port or your wifi will not work.
 //
 //#define SERIAL1_COMMANDS
 //#define SERIAL2_COMMANDS
 //#define SERIAL3_COMMANDS
+//#define SERIAL4_COMMANDS
+//#define SERIAL5_COMMANDS
+//#define SERIAL6_COMMANDS
 //
 // BLUETOOTH SERIAL ON ESP32
 // On ESP32 you have the possibility to use the builtin BT serial to connect to