meshtastic-firmware/docs/software/build-instructions.md

Build instructions

This project uses the simple PlatformIO build system. You can use the IDE, but for brevity in these instructions I describe use of their command line tool.

1. Purchase a suitable radio (see above)
2. Install PlatformIO
3. Download this git repo and cd into it
4. Run git submodule update --init --recursive to pull in dependencies this project needs.
5. If you are outside the USA, run "export COUNTRY=EU865" (or whatever) to set the correct frequency range for your country. Options are provided for EU433, EU865, CN, JP and US (default). Pull-requests eagerly accepted for other countries.
6. Plug the radio into your USB port
7. Type pio run --environment XXX -t upload (This command will fetch dependencies, build the project and install it on the board via USB). For XXX, use the board type you have (either tbeam, heltec, ttgo-lora32-v1, ttgo-lora32-v2).
8. Platform IO also installs a very nice VisualStudio Code based IDE, see their tutorial if you'd like to use it.

Decoding stack traces

If you get a crash, you can decode the addresses from the Backtrace: line:

1. Save the Backtrace: 0x.... line to a file, e.g., backtrace.txt.
2. Run bin/exception_decoder.py backtrace.txt (this uses symbols from the last firmware.elf, so you must be running the same binary that's still in your .pio/build directory).