Earthly.dev build environment for Rust on ESP32

Overview

This repo provides an isolated and reproducible build environment for creating Rust binaries that run on the ESP32.
A simple "hello world" project is present in main.rs.

Prerequisites

• Docker
• earthly, installed
• espfash cargo tool, used to flash the esp32

How to use

1. Clone this repo
2. Put your code under src
3. Update Cargo.toml
4. Run either the one of the following commands to build the firmware Debug build:

earthly +firmware

Release build:

earthly --build-arg BUILD_TYPE=release  +firmware

5. Flash the firmware
   Where: /dev/ttyUSB0 is the serial device of your ESP32.
   Where: esp32-rust-build-environment is the project name from your Cargo.toml file.

earthly --build-arg SERIAL_PORT=/dev/ttyUSB0 --build-arg BUILD_BINARY=artifacts/debug/esp32-rust-build-environment +flash