Controlling an Arduino using the Dino gem.

daylight.rb

require 'dino'

# Slightly nicer interface to the Arduino :)
module Dino
  class << self
    def board
      @board ||= Board.new TxRx.new
    end

    def method_missing(m, pin)
      klass = const_get("Components::#{m.capitalize}")
      klass.new pin: pin, board: board
    end
  end
end

# Get an array of leds
@leds = Dino.led(10), Dino.led(11)

# Control multiple leds
def turn(*states)
  [email protected]_with_index do |led,i|
    led.send(states[i])
  end
end

# Turn off the leds before exiting
trap("SIGINT") { exit turn :off, :off }

# Handle the light sensor data
Dino.sensor('A0').when_data_received -> data do
  case data.to_i
    when 900..1024 then turn :off, :off
    when 810..899 then  turn :on,  :off
    else                turn :on,  :on
  end
end

# Sleep forever
sleep

Note that when_data_recieved will take a block instead of a lambda when 0.12 of the gem is released.