Feature/lilygo t eth elite

[ndrpri]

Overview

This PR adds full MeshCore firmware support for the LilyGo T-ETH-Elite ESP32-S3 board,
paired with the T-ETH-Elite LoRa Shield in both SX1262 and SX1276 radio variants.

Hardware

• Main board: LilyGo T-ETH-Elite (ESP32-S3-WROOM-1, 16MB Flash, 8MB PSRAM)
• Ethernet: W5500 via SPI (SPI2_HOST/FSPI)
• LoRa Shield: T-ETH-Elite LoRa Shield with:
  • SX1262 (433MHz / 868MHz / 915MHz)
  • SX1276 (433MHz / 868MHz / 915MHz)
• GPS: L76K module on Serial1 (IO39/IO42)
• Buttons: 5x analog buttons on IO7

Changes

New files

• boards/t_eth_elite.json — PlatformIO board definition
• lib/ETHClass2/ — Ethernet driver for W5500 on ESP32-S3
• src/helpers/esp32/TEthEliteBoard.h — dispatcher header
• src/helpers/esp32/TEthEliteBoard_SX1262.h — pin definitions for SX1262 variant
• src/helpers/esp32/TEthEliteBoard_SX1276.h — pin definitions for SX1276 variant
• src/helpers/esp32/TEthEliteBoard.cpp — board implementation shared by both variants
• variants/lilygo_t_eth_elite_sx1262/ — SX1262 variant (target.h, target.cpp, platformio.ini)
• variants/lilygo_t_eth_elite_sx1276/ — SX1276 variant (target.h, target.cpp, platformio.ini)

Modified files

• examples/companion_radio/main.cpp — added USE_ETHERNET support alongside WIFI_SSID

Available environments

Both variants provide the following firmware types:

• _repeater — standalone repeater (LoRa only)
• _repeater_eth — repeater with Ethernet management
• _repeater_bridge_espnow — repeater with ESPNow bridge
• _room_server — room server (LoRa only)
• _room_server_eth — room server with Ethernet management
• _companion_radio_eth — companion radio via Ethernet TCP
• _companion_radio_wifi — companion radio via WiFi
• _companion_radio_ble — companion radio via Bluetooth LE

Key implementation notes

• ETH (W5500) uses SPI2_HOST (FSPI), radio uses default SPIClass — no bus conflict
• SX1276 requires a delay(100) after std_init() for RSSI noise floor stabilization
• GPS Serial1 is explicitly initialized with board-specific pins in TEthEliteBoard::begin()
• ETH and WiFi/BLE are mutually exclusive per firmware variant
• Static IP configurable via build flags: ETH_STATIC_IP, ETH_GATEWAY, ETH_SUBNET, ETH_DNS

Tested

• Ethernet connectivity (static IP)
• LoRa radio SX1276 TX/RX
• Companion radio via Ethernet (TCP port 5000)
• Companion radio via BLE
• OTA firmware update via

[lnxsamox86]

Hello,
thank you for the FW. I just successfully compiled LilyGo_T_ETH_Elite_SX1262_companion_radio_ble.

To make it work I had to remove MomentaryButton user_btn(PIN_USER_BTN_ANA, 1000, true) from target.cpp and hardcode create button with MomentaryButton user_btn(0, 1000, true);

Compiling .pio/build/LilyGo_T_ETH_Elite_SX1262_companion_radio_ble/src/helpers/TxtDataHelpers.cpp.o examples/companion_radio/ui-new/UITask.cpp: In member function 'void UITask::begin(DisplayDriver*, SensorManager*, NodePrefs*)': examples/companion_radio/ui-new/UITask.cpp:558:3: error: 'analog_btn' was not declared in this scope analog_btn.begin(); ^~~~~~~~~~ examples/companion_radio/ui-new/UITask.cpp:558:3: note: suggested alternative: 'analogWrite' analog_btn.begin(); ^~~~~~~~~~ analogWrite examples/companion_radio/ui-new/UITask.cpp: In member function 'virtual void UITask::loop()': examples/companion_radio/ui-new/UITask.cpp:755:22: error: '_analogue_pin_read_millis' was not declared in this scope if (abs(millis() - _analogue_pin_read_millis) > 10) { ^~~~~~~~~~~~~~~~~~~~~~~~~ Compiling .pio/build/LilyGo_T_ETH_Elite_SX1262_companion_radio_ble/src/helpers/bridges/BridgeBase.cpp.o examples/companion_radio/ui-new/UITask.cpp:756:5: error: 'ev' was not declared in this scope ev = analog_btn.check(); ^~ examples/companion_radio/ui-new/UITask.cpp:756:10: error: 'analog_btn' was not declared in this scope ev = analog_btn.check(); ^~~~~~~~~~ examples/companion_radio/ui-new/UITask.cpp:756:10: note: suggested alternative: 'analogWrite' ev = analog_btn.check(); ^~~~~~~~~~ analogWrite Compiling .pio/build/LilyGo_T_ETH_Elite_SX1262_companion_radio_ble/src/helpers/esp32/ESPNOWRadio.cpp.o *** [.pio/build/LilyGo_T_ETH_Elite_SX1262_companion_radio_ble/examples/companion_radio/ui-new/UITask.cpp.o] Error 1

[ndrpri]

Hi! Thank you for testing and reporting this.
This is actually a known bug that we already identified and fixed in our branch. The issue is tracked here: #2203
The root cause is that PIN_USER_BTN_ANA is defined in TEthEliteBoard_SX1262.h, which causes UITask.cpp to look for analog_btn and _analogue_pin_read_millis variables that are not declared in the companion radio context.
The correct fix (already applied in our branch) is in UITask.cpp:

Replace abs(millis() - _analogue_pin_read_millis) with (long)(millis() - _analogue_pin_read_millis)
Declare int ev locally inside the PIN_USER_BTN_ANA block
Declare analog_btn as extern MomentaryButton analog_btn in target.h inside #ifdef PIN_USER_BTN_ANA
Add MomentaryButton analog_btn(PIN_USER_BTN_ANA, 1000, true) in target.cpp

Please do not hardcode pin 0 — PIN_USER_BTN_ANA (IO7) is the correct analog button pin for this board.
We will update the PR with these fixes shortly. Thank you!

[ndrpri]

Thank you for testing and reporting this!
We have already fixed this issue in commit ndrpri@f6319e86
The fix includes:

analog_btn properly declared in target.cpp and target.h
UITask.cpp fixed for ESP32-S3: abs() ambiguity resolved and ev declared locally in the PIN_USER_BTN_ANA block

Please update your branch and it should compile correctly. No need to hardcode pin 0!