Battery (TechoBoard.h/cpp): Added PIN_VBAT_MEAS_EN (P0.31) — the T-Echo
Lite has a gated voltage divider that must be enabled before reading. Also
added pinMode(PIN_VBAT_READ, INPUT) before each ADC read to reclaim P0.02
from other peripherals. Pin definitions hardcoded from LilyGo's
t_echo_lite_config.h.
I2C (variant.h): Corrected SDA/SCL from P0.04/P0.02 to P1.04/P1.02 per
LilyGo's IIC_1_SDA/IIC_1_SCL. The old P0.02 mapping conflicted with the
battery ADC pin.
GPS (variant.h): Corrected all five GPS pin assignments to match LilyGo's
config — UART TX/RX, wake, PPS, and power enable were all scrambled.
SPI (variant.h): Fixed SPI_INTERFACES_COUNT from _PINNUM(0, 2) to (2).
Tested on T-Echo Lite Non-Shell (USB-C, no display). Battery readings match
Heltec V4 reference within 10mV.
T-Echo Lite Non-Shell has no ePaper display, but the existing
companion BLE env inherits DISPLAY_CLASS=GxEPDDisplay from the base
env. This causes display.begin() to run on non-existent hardware,
corrupting BLE initialization and generating a random PIN that
cannot be displayed, making BLE connection impossible.
Add LilyGo_T-Echo-Lite_non_shell_companion_radio_ble env that:
- excludes DISPLAY_CLASS and ePaper-related build flags
- removes GxEPDDisplay.cpp and ui-new from build sources
- uses static BLE_PIN_CODE=123456 (avoids random PIN generation)
Also fix boards/t-echo.json:
- add nrfutil to upload protocols list
- add use_1200bps_touch=true and wait_for_upload_port=true
to enable reliable flashing via PlatformIO upload button
The Waveshare RP2040-LoRa board has an RF switch with two complementary
control lines:
- DIO2 (CTRL) -- driven automatically by the SX1262 chip: HIGH on TX,
LOW on RX
- GPIO17 (!CTRL) -- was not configured in MeshCore, so it floated and
the switch never properly selected the LNA/RX path
Without this pin driven, the RF switch never switches to RX mode,
resulting in completely degraded reception. TX was unaffected because
DIO2 alone is sufficient to activate the TX path.
Adding SX126X_RXEN=17 lets RadioLib drive GPIO17 as the complement of
DIO2, so the switch correctly routes the signal to the LNA on receive.
Reference: https://files.waveshare.com/wiki/RP2040-LoRa/Rp2040-lora-sch.pdf
variants/thinknode_m5/platformio.ini contained actual WiFi SSID and
password credentials (Livebox-633C) committed by mistake. Replaced
with placeholder values consistent with other variants (myssid/mypwd).
env:Generic_ESPNOW_room_svr was using 'Heltec Room' as ADVERT_NAME,
causing Generic ESPNow room server nodes to advertise with the wrong
device name on the mesh.
Repeater and Room Server environments in variants/thinknode_m5/platformio.ini
were using 'Thinknode M2' as the ADVERT_NAME, causing M5 nodes to advertise
with the wrong device name on the mesh.
- env:ThinkNode_M5_Repeater: 'Thinknode M2 Repeater' -> 'Thinknode M5 Repeater'
- env:ThinkNode_M5_room_server: 'Thinknode M2 Room Server' -> 'Thinknode M5 Room Server'
Liam Cottle