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How to use an Arduino library in a Rust project?

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Example of an Arduino library usage in a Rust project

The project tested with Arduino UNO on Fedora 35.
It demonstrates the usage of LiquidCrystal_I2C with rust project to control I2C Text Display from Rust. It also shows how to combine it with existing Arduino rust crates. arduino_hal crate is used to blink the LED.

This is the source code for Five simple steps to use any Arduino C++ library in a Rust project 🦀. Demo video.

Project setup

  • Install avr toolchain and avrdude
sudo dnf install avrdude avr-gcc avr-libc
  • Install dependencies to compile ravedude
sudo dnf install systemd-devel pkgconf-pkg-config
  • Install ravedude:
cargo install ravedude
  • Install bindgen dependencies:
sudo dnf install clang-devel
  • Install arduino IDE and validate it is working by compiling a simple sketch.
  • Install LiquidCrystal_I2C library to Arduino Libraries folder (manually or using Arduino IDE like you would normally do)
  • Edit arduino.yaml to configure your arduino installation and version of core library
  • Ensure to have rustfmt installed
rustup component add rustfmt
  • Plug in your Arduino UNO and run the project:
cargo run

If you see the following error

> avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

then try editing the permission or adding you user to dialout group (require re-login):

sudo chmod a+rw /dev/ttyACM0
sudo usermod -aG dialout $USER

Windows

If you are running on Windows, consider different way of system dependencies installation.

  • Instead of install avr tools using dnf, locate them in your Arduino IDE installation and add the folders containing avr-gcc and avrdude to the PATH. I had to add the following:
    • %LOCALAPPDATA%\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7\bin\
    • %LOCALAPPDATA%\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17\bin\
  • Ensure avr-gcc and avrdude are found.
  • Download and install clang for Windows here
  • Setup LIBCLANG_PATH to point to <CLANG_INSTALL_DIR>\bin
  • Setup AR to point to %LIBCLANG_PATH%\llvm-ar.exe
  • Don't forget to update arduino.yaml with correct paths.
  • cargo build and cargo run should work now!

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How to use an Arduino library in a Rust project?

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