description

====

a ruby gem and repository to contribute gpio code for devices such as Raspberry Pi to read sensors and control outputs.

gpio allows for devices such as raspberry pi or systems with 1wire usb adapters to speak to the system's input/output pins.

installation

====

using bundler, add this to your Gemfile in the root of your app

gem 'gpio'

install bundler and then run bundle install

gem install bundler
bundle install

from command line

gem install gpio

require in your ruby file

require 'gpio'

====

let's setup a motion sensor on GPIO pin 17 on a RaspberryPi (default).

motion = GPIO::MotionDetector.new(pin: 17)

do we detect and motion yet?

motion.detect

let's print a message corresponding to the motion.detect?

puts motion.detect ? "Motion detected!" : "No motion detected."

was the value any different than the last time it detected?

motion.changed?
puts "last: #{motion.last_reading}, current: #{motion.reading}"

wait until the value changes before we move on.

until motion.changed? do
	motion.detect
	sleep 0.5
end
puts "Something changed!"
puts "last: #{motion.last_reading}, current: #{motion.reading}"