Meshtastic-ESP32C3-SuperMini- DX LR30 SX1262

🇪🇸 Descripción

Este repositorio contiene los archivos de configuración necesarios (variant.h, pins_arduino.h y platformio.ini) para compilar el firmware de Meshtastic en un nodo DIY construido con:

• MCU: ESP32-C3 SuperMini (Nologo/Genérico)
• Radio LoRa: DX-LR30 (SX1262) - (AliExpress: https://a.aliexpress.com/_EHXjuJI)

Esta combinación es económica, muy pequeña y eficiente energéticamente.

🇺🇸 Description

This repository hosts the necessary configuration files to compile Meshtastic firmware for a custom DIY node built with:

• MCU: ESP32-C3 SuperMini
• LoRa Radio: DX-LR30 (SX1262)

🔌 Wiring Guide / Conexiones

⚠️ WARNING: The DX-LR30 module works at 3.3V. Do not connect to 5V.

Function	DX-LR30 Pin	ESP32-C3 Pin (GPIO)	Notes
Power	VCC	3.3V
Ground	GND	GND	Common ground
SPI Clock	SCK	GPIO 4
SPI Miso	MISO	GPIO 5
SPI Mosi	MOSI	GPIO 6
Chip Select	NSS / CS	GPIO 7
Reset	RST	GPIO 10
DIO1	DIO1	GPIO 3	IRQ
Busy	BUSY	GPIO 2	Mandatory for SX1262

🛠️ How to Compile / Cómo Compilar

Prerequisites / Requisitos

• Visual Studio Code
• PlatformIO Extension
• Git

Steps / Pasos

1. Clone the official Meshtastic firmware repository:

   git clone [https://github.com/meshtastic/firmware.git](https://github.com/meshtastic/firmware.git)
   cd firmware
   

2. Create a new folder inside variants:

   • Path: firmware/variants/diy_c3_lr30

3. Copy the files variant.h and pins_arduino.h from this repository into that new folder.

4. Edit the platformio.ini file in the root of the firmware folder. Add the following environment block at the end:

   [env:diy-c3-lr30]
   extends = esp32c3_base
   board = esp32-c3-devkitm-1
   board_build.variants_dir = variants
   board_build.variant = diy_c3_lr30
   
   build_flags =
     ${esp32c3_base.build_flags}
     -DARDUINO_USB_MODE=1
     -DARDUINO_USB_CDC_ON_BOOT=1
     -I variants/diy_c3_lr30
   
   lib_deps =
     ${esp32c3_base.lib_deps}
   

5. Open PlatformIO, select the environment env:diy-c3-lr30, Clean, and then Upload.

🐛 Troubleshooting / Solución de Problemas

• Error: SX126X_CS was not declared: This is fixed in the provided variant.h by mapping standard pin names to the specific variables required by the SX126x library driver.
• Low RSSI (-120dBm): Check your antenna connection and ensure you are not testing without an antenna attached.
• Compilation Error pins_arduino.h not found: Ensure you copied the pins_arduino.h provided in this repo to the variant folder.

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Happy Meshing!