Address PR review feedback for Ethernet support

- Add #pragma once to SerialEthernetInterface.h
- Rename TCP_PORT to ETH_TCP_PORT with #ifndef guard
- Fix typos: "initalizing" → "initializing"
- Fix #elif without condition → #else for STM32 block
- Replace infinite loop on ETH init failure with halt()
- Remove heartbeat Serial.print(".") output
- Remove dead beginETH() call (ETH_ENABLED, not RAK_ETH_ENABLE)
- Comment out MESH_DEBUG and ETH_DEBUG_LOGGING build flags

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

examples/companion_radio/main.cpp

@@ -12,7 +12,6 @@ static uint32_t _atoi(const char* sp) {
   return n;
 }
 
-uint32_t tick_count = 0;
 
 #if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
   #include <InternalFileSystem.h>
@@ -87,7 +86,7 @@ uint32_t tick_count = 0;
   #ifdef ETH_ENABLED
     #include <helpers/nrf52/SerialEthernetInterface.h>
     SerialEthernetInterface serial_interface;
-  #elif
+  #else
     #include <helpers/ArduinoSerialInterface.h>
     ArduinoSerialInterface serial_interface;
   #endif
@@ -161,7 +160,7 @@ void setup() {
 
 #ifdef BLE_PIN_CODE
   serial_interface.begin(BLE_NAME_PREFIX, the_mesh.getNodePrefs()->node_name, the_mesh.getBLEPin());
-#elif ETH_ENABLED
+#elif defined(ETH_ENABLED)
 
   Serial.print("Waiting for serial to connect...\n");
   time_t timeout = millis();
@@ -170,13 +169,11 @@ void setup() {
   {
     if ((millis() - timeout) < 5000) { delay(100); } else { break; }
   }
-  Serial.print("Initalizing ethernet adapter....\n");
+  Serial.print("Initializing ethernet adapter....\n");
   bool result = serial_interface.begin();
   if (!result) {
-    while (true)
-      {
-        delay(1); // Do nothing, just love you.
-      }
+    Serial.println("ETH: Init failed, halting");
+    halt();
   }
 #else
   serial_interface.begin(Serial);
@@ -252,12 +249,6 @@ void loop() {
 #endif
   rtc_clock.tick();
 
-  // Debugging only... making sure something is alive.
-  tick_count++;
-  if (tick_count % 5000 == 0) {
-    Serial.print(".");
-  }
-
 #ifdef ETH_ENABLED
   serial_interface.maintain();
 #endif

src/helpers/nrf52/SerialEthernetInterface.cpp

@@ -20,7 +20,7 @@ SPIClass ETH_SPI_PORT(NRF_SPIM1, PIN_SPI1_MISO, PIN_SPI1_SCK, PIN_SPI1_MOSI);
 
 bool SerialEthernetInterface::begin() {
   
-  ETH_DEBUG_PRINTLN("Ethernet initalizing");
+  ETH_DEBUG_PRINTLN("Ethernet initializing");
 
 #ifdef PIN_ETH_POWER_EN
         ETH_DEBUG_PRINTLN("Ethernet power enable");
@@ -90,7 +90,7 @@ bool SerialEthernetInterface::begin() {
   ETH_DEBUG_PRINT_IP("Gateway", gateway);
 
   server.begin();   // start listening for clients
-  ETH_DEBUG_PRINTLN("Ethernet: listening on TCP port: %d", TCP_PORT);
+  ETH_DEBUG_PRINTLN("Ethernet: listening on TCP port: %d", ETH_TCP_PORT);
 
   return true;
 }

src/helpers/nrf52/SerialEthernetInterface.h

@@ -1,10 +1,12 @@
+#pragma once
 
 #include "helpers/BaseSerialInterface.h"
 #include <SPI.h>
 #include <RAK13800_W5100S.h>
 
-// expects ETH_ENABLED = 1
-#define TCP_PORT 5000
+#ifndef ETH_TCP_PORT
+  #define ETH_TCP_PORT 5000
+#endif
 // define ETH_RAW_LINE=1 to use raw line-based CLI instead of framed packets
 
 class SerialEthernetInterface : public BaseSerialInterface {
@@ -42,7 +44,7 @@ class SerialEthernetInterface : public BaseSerialInterface {
   protected:
 
   public:
-    SerialEthernetInterface() : server(EthernetServer(TCP_PORT)) { 
+    SerialEthernetInterface() : server(EthernetServer(ETH_TCP_PORT)) { 
         deviceConnected = false;
         _isEnabled = false;
         _last_write = 0;

variants/rak4631/RAK4631Board.cpp

@@ -36,9 +36,6 @@ void RAK4631Board::begin() {
   pinMode(PIN_USER_BTN_ANA, INPUT_PULLUP);
 #endif
 
-#ifdef RAK_ETH_ENABLE
-  beginETH();
-#endif
 
 #if defined(PIN_BOARD_SDA) && defined(PIN_BOARD_SCL)
   Wire.setPins(PIN_BOARD_SDA, PIN_BOARD_SCL);

variants/rak4631/platformio.ini

@@ -57,7 +57,7 @@ build_flags =
   -D ADMIN_PASSWORD='"password"'
   -D MAX_NEIGHBOURS=50
   -D ETH_ENABLED=1
-  -D MESH_DEBUG=1
+;  -D MESH_DEBUG=1
 build_src_filter = ${rak4631.build_src_filter}
   +<helpers/ui/SSD1306Display.cpp>
   +<../examples/simple_repeater>
@@ -139,7 +139,7 @@ build_flags =
   -D ADMIN_PASSWORD='"password"'
   -D ROOM_PASSWORD='"hello"'
   -D ETH_ENABLED=1
-  -D MESH_DEBUG=1
+;  -D MESH_DEBUG=1
 build_src_filter = ${rak4631.build_src_filter}
   +<helpers/ui/SSD1306Display.cpp>
   +<../examples/simple_room_server>
@@ -187,8 +187,8 @@ build_flags =
   -D ETH_ENABLED=1
 ; NOTE: DO NOT ENABLE -->  -D MESH_PACKET_LOGGING=1
 ; NOTE: DO NOT ENABLE -->  -D MESH_DEBUG=1
-  -D MESH_DEBUG=1
-  -D ETH_DEBUG_LOGGING=1
+;  -D MESH_DEBUG=1
+;  -D ETH_DEBUG_LOGGING=1
 build_src_filter = ${rak4631.build_src_filter}
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>