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.