rubyでArduinoのシリアルポートを叩く

gistfile1.txt

require 'rubygems'
require 'serialport'

sp = SerialPort.new("COM6", 9600, 8, 1, SerialPort::NONE)
command = ["0D"]
sp.write(command.pack("H*"))
sp.read
sp.read

loop {
  light = sp.read
  if light.to_i < 100
    puts "akarui!!!"
  else
    puts "kurai..."
  end
  sleep 10
}