index.md

title	Introduction
keywords	PicoRuby documentation
tags	introduction
sidebar	picoruby_sidebar
permalink	index.html
summary	PicoRuby is the smallest Ruby implementation for one-chip microcontrollers.

Presentation

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Products by PicoRuby

R2P2

Microcontroller programming framework.

• See Getting Start with R2P2

Implementations

• For Raspberry Pi Pico: https://github.com/picoruby/picoruby/tree/master/mrbgems/picoruby-r2p2
• For ESP32: https://github.com/picoruby/R2P2-ESP32

Porting for peripherals and networking

	Raspi Pico	Raspi Pico W	ESP32
picoruby-adc	✓	✓	✓
picoruby-ble		✓
picoruby-cyw43		✓
picoruby-env	✓	✓	✓
picoruby-gpio	✓	✓	✓
picoruby-i2c	✓	✓	✓
picoruby-io-console	✓	✓	✓
picoruby-irq	✓	✓	✓
picoruby-littlefs	✓	✓	✓
picoruby-machine	✓	✓	✓
picoruby-net-http		✓	✓
picoruby-net-mqtt		✓	✓
picoruby-net-ntp		✓	✓
picoruby-net-websocket		✓	✓
picoruby-pwm	✓	✓	✓
picoruby-rng	✓	✓	✓
picoruby-spi	✓	✓	✓
picoruby-uart	✓	✓	✓
picoruby-watchdog	✓	✓

PicoRuby.wasm

PicoRuby port to WebAssembly.

• See wasm
• https://www.npmjs.com/package/@picoruby/wasm-wasi

PRK Firmware (deprecated)

Firmware framework for DIY keyboards.

• https://github.com/picoruby/prk_firmware
• [KBD.news] PRK firmware: PRK is a PicoRuby-based keyboard firmware running on RP2040 chips. https://kbd.news/PRK-firmware-1370.html

NOTE: As of 2026, PRK Firmware is no longer maintaind. Use Keyboard class in R2P2 instead. See https://github.com/picoruby/picoruby/tree/master/mrbgems/picoruby-keyboard