⚠️ WiringPi was deprecated by its author in August 2019. As of 31st October 2023 nobody has shown an interest in properly maintaining it. Between this, and changes to GPIO in Rasberry Pi OS Bookworm and on the Raspberry Pi 5, this project is going nowhere. It has been archived to more clearly indicate this status.

WiringPi is an implementation of most of the Arduino Wiring functions for the Raspberry Pi, this gem is a wrapper for the main wiringpi library and provides a nice OO interface with a few other handy helpers.

Install with gem install wiringpi2 or use bundler's Gemfile

source 'https://rubygems.org'

gem 'wiringpi2' # https://github.com/WiringPi/WiringPi-Ruby

then: bundle install

#!/usr/bin/env ruby

require 'bundler'
Bundler.setup
Bundler.require

io = WiringPi::GPIO.new do |gpio|
  gpio.pin_mode(0, WiringPi::OUTPUT)
  gpio.pin_mode(1, WiringPi::INPUT)
end

pin_state = io.digital_read(1) # Read from pin 1
puts pin_state

io.digital_write(0, WiringPi::HIGH) # Turn pin 0 on
io.delay(100)                       # Wait
io.digital_write(0, WiringPi::LOW)  # Turn pin 0 off

You will need to run your scripts as root because WiringPi accesses /dev/mem

For a complete run-down see the pins page of the wiringpi website.

Full details on the wiringpi website.