シリアルポートに入力があったらTwitterにつぶやく

Arduino側

#include <Bounce.h>

int btPin = 8;
int ledPin = 13;
int pinState = LOW;

Bounce bn = Bounce(btPin, 20);

void setup(){
  pinMode(btPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop(){
  if(bn.update()){
    if(bn.risingEdge()){
      digitalWrite(ledPin, HIGH);
      Serial.println("push");
    }
    if(bn.fallingEdge()){
      digitalWrite(ledPin, LOW);
      Serial.println("off");
    }
  }
}

ruby側

#!/usr/bin/env ruby
# encoding : utf-8
                                                                                                                                                                                     
require 'twitter'
require 'yaml'
require 'serialport'

sp = SerialPort.new("/dev/tty.usbmodem1421", 9600, 8, 1, SerialPort::NONE)

config_path = File.expand_path(File.dirname(__FILE__) + '/config.yml')
twitter_config = YAML.load_file(config_path)
Twitter.configure do |config|
  config.consumer_key = twitter_config[:consumer_key]
  config.consumer_secret = twitter_config[:consumer_secret]
  config.oauth_token = twitter_config[:oauth_token]
  config.oauth_token_secret = twitter_config[:oauth_token_secret]
end

message_path = File.expand_path(File.dirname(__FILE__) + '/message.yml')
message = YAML.load_file(message_path)

while(sp.gets) do
  Twitter.update message.sample
end
sp.close