Ethernet + telnet support

config/default/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/default/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/3DFabXYZ/Migbot/Configuration.h

@@ -108,7 +108,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/3DFabXYZ/Migbot/Configuration_adv.h

@@ -3451,6 +3451,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/ADIMLab/Gantry v1/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/ADIMLab/Gantry v1/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/ADIMLab/Gantry v2/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/ADIMLab/Gantry v2/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/AlephObjects/TAZ4/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/AlephObjects/TAZ4/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Alfawise/U20-bltouch/Configuration.h

@@ -132,7 +132,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 2
 

config/examples/Alfawise/U20-bltouch/Configuration_adv.h

@@ -3442,6 +3442,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Alfawise/U20/Configuration.h

@@ -132,7 +132,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 2
 

config/examples/Alfawise/U20/Configuration_adv.h

@@ -3441,6 +3441,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/AliExpress/CL-260/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/AliExpress/UM2pExt/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/AliExpress/UM2pExt/Configuration_adv.h

@@ -3442,6 +3442,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Anet/A2/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Anet/A2/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Anet/A2plus/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Anet/A2plus/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Anet/A6/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Anet/A6/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Anet/A8/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Anet/A8/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Anet/A8plus/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Anet/A8plus/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Anet/E10/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Anet/E10/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Anet/E16/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Anet/E16/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Anet/ET4/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Anet/ET4/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/AnyCubic/Chiron/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/AnyCubic/Chiron/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/AnyCubic/Mega Zero/Anycubic V1/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/AnyCubic/Mega Zero/Anycubic V1/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/AnyCubic/Mega Zero/BigTreeTech SKR Mini MZ V1.0/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 #define SERIAL_PORT_2 -1
 

config/examples/AnyCubic/Mega Zero/BigTreeTech SKR Mini MZ V1.0/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/AnyCubic/i3 Mega/Configuration.h

@@ -110,7 +110,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/AnyCubic/i3 Mega/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/AnyCubic/i3/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/AnyCubic/i3/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/ArmEd/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 3
 

config/examples/ArmEd/Configuration_adv.h

@@ -3444,6 +3444,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Artillery/Genius/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Artillery/Genius/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Artillery/Sidewinder X1/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Artillery/Sidewinder X1/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Artillery/Sidewinder X1_0.9_degree_BMG_E3D_V6/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Artillery/Sidewinder X1_0.9_degree_BMG_E3D_V6/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Azteeg/X5GT/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/BIBO/TouchX/cyclops/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/BIBO/TouchX/cyclops/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/BIBO/TouchX/default/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/BIBO/TouchX/default/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/BIQU/B1-BLTouch/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 #define SERIAL_PORT_2 -1
 

config/examples/BIQU/B1-BLTouch/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/BIQU/B1/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 #define SERIAL_PORT_2 -1
 

config/examples/BIQU/B1/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/BQ/Hephestos/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/BQ/Hephestos/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/BQ/Hephestos_2/Configuration.h

@@ -115,7 +115,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/BQ/Hephestos_2/Configuration_adv.h

@@ -3448,6 +3448,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/BQ/WITBOX/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/BQ/WITBOX/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/CTC/i3 2560 Rev A/no probe/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Cartesio/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Cartesio/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Copymaster3D/300/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Copymaster3D/400/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Copymaster3D/500/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10 Mini/CrealityV1/Configuration.h

@@ -116,7 +116,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10 Mini/CrealityV1/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-10 Mini/MEEB-3DP/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 #define SERIAL_PORT_2 1
 

config/examples/Creality/CR-10 Mini/MEEB-3DP/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-10 S4/CrealityV1/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10 S4/CrealityV1/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-10 S5/CrealityV1/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10 S5/CrealityV1/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-10 V2/Configuration.h

@@ -114,7 +114,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10 V2/Configuration_adv.h

@@ -3446,6 +3446,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-10/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 #define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10/BigTreeTech SKR Mini E3 2.0/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-10/CrealityV1/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10/CrealityV1/Configuration_adv.h

@@ -3443,6 +3443,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-10S/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 #define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10S/BigTreeTech SKR Mini E3 2.0/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-10S/CrealityV1/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-10S/CrealityV1/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-20 Pro/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-20 Pro/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-20/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-20/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/CR-8/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/CR-8/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/Ender-2/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
 

config/examples/Creality/Ender-2/Configuration_adv.h

@@ -3440,6 +3440,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */

config/examples/Creality/Ender-3 Pro V1.5/Configuration.h

@@ -107,7 +107,8 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 #define SERIAL_PORT_2 3
 

config/examples/Creality/Ender-3 Pro V1.5/Configuration_adv.h

@@ -3441,6 +3441,13 @@
                               // Default behavior is limited to Z axis only.
 #endif
 
+/**
+ * Ethernet. Use M552 to enable and set the IP address.
+ */
+#if HAS_ETHERNET
+  #define MAC_ADDRESS { 0xDE, 0xAD, 0xBE, 0xEF, 0xF0, 0x0D }  // A MAC address unique to your network
+#endif
+
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */