Arduino experiment to drive some DIODER from IKEA via OSC by using an Arduino and a small ruby script.

lednet.cpp

#include <SPI.h>
#include <Dhcp.h>
#include <Dns.h>
#include <Ethernet.h>
#include <EthernetClient.h>
#include <EthernetServer.h>
#include <EthernetUdp.h>
#include <util.h>

// color swirl! connect an RGB LED to the PWM pins as indicated
// in the #defines
// public domain, enjoy!
 
#define REDPIN 5
#define GREENPIN 6
#define BLUEPIN 3
 
#define FADESPEED 5     // make this higher to slow down

EthernetUDP Udp;
char packetBuffer[UDP_TX_PACKET_MAX_SIZE];

void setup() {
  byte mac[] = {1,2,3,4,5,6};
  int success = 0;
  pinMode(REDPIN, OUTPUT);
  pinMode(GREENPIN, OUTPUT);
  pinMode(BLUEPIN,   OUTPUT);
  Serial.begin(9600);
  success = Ethernet.begin(mac);

  if (success) {
    Serial.println("My IP address is:");
    Serial.println(Ethernet.localIP());
  }
  Udp.begin(8888);
}
 
 
void loop() {

  int packetSize = Udp.parsePacket();
  if(packetSize)
  {
    IPAddress remote = Udp.remoteIP();

    // read the packet into packetBufffer
    Udp.read(packetBuffer,UDP_TX_PACKET_MAX_SIZE);
    if (packetBuffer[0] == 'S') {
       analogWrite(REDPIN, (int)packetBuffer[1]);
       analogWrite(GREENPIN, (int)packetBuffer[2]);
       analogWrite(BLUEPIN, (int)packetBuffer[3]);
    }
    if (packetBuffer[0] == 'R') {
      analogWrite(REDPIN, (int)packetBuffer[1]);
    }
    if (packetBuffer[0] == 'G') {
      analogWrite(GREENPIN, (int)packetBuffer[1]);
    }
    if (packetBuffer[0] == 'B') {
      analogWrite(BLUEPIN, (int)packetBuffer[1]);
    }
    
    
  }
}

osc_to_rgb.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'socket'
require 'osc'

ip = ARGV[0]

HOST = '0.0.0.0'
PORT = 5000

u2 = UDPSocket.new
u2.connect(ip, 8888)

s = OSC::UDPServer.new
s.bind HOST, PORT

s.add_method '/led/*', 'f' do |msg|
  domain, port, host, ip = msg.source
  color = msg.address.split("/").last
  u2.send(color.upcase + (255 * msg.args[0]).to_i.chr, 0);
end
s.serve