Rubyduino is an experimental tool that lets you write Ruby code for Arduino UNO boards, compiling it to firmware using Spinel (a Ruby AOT compiler by Matz) and uploading it via the AVR toolchain. Install via `gem install rubyduino`, ensure avr-gcc, avr-objcopy, and avrdude are in PATH, then run your Ruby sketch directly against the board. Supports macOS (Homebrew), Debian/Ubuntu, and Fedora.
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