trev/arduino/src/sketch.ino

#include <RCSwitch.h>

RCSwitch mySwitch = RCSwitch();

uint8_t message[8];
int index = 0;
boolean com = false;
boolean on = false;

void setup()
{
  Serial.begin(9600);
  mySwitch.enableTransmit(11);
}

void loop()
{
  while(Serial.available()) { 
    if(index > 0 || (Serial.peek() >= 80 && Serial.peek() <= 95)) {
      message[index++] = Serial.read();
      if(index > 7){
        decodeMessage();
        index = 0;
      }
    }
  }
}

void decodeMessage() {
  if(com) {
    int cmd    = message[0];
    int pin    = message[1] - 97;
    int val[6];
    memcpy(val, message + 2, 6); 

    switch (cmd) {
        //case 80:  break;
        //case 81:  break;
        //case 82:  break;
        //case 83:  break;
        //case 84:  break;
        //case 85:  break;
        //case 86:  break;
        case 87: switchLight(val); break;
        //case 88:  break;
        //case 89:  break;
        default:                   break;
    }
  
  } else if(message[0] == 90) {

    com = true;
    Serial.println("Ready!");
  
  } else {
  
    Serial.println("Arduino not configured for communication!");
  
  }
}

void switchLight(int val[]) {
  
  String triStateCode = "";

  for(int i = 0; i < 6; i++)
  {
    String triStatePart = String(val[i], HEX);
    triStatePart = (triStatePart.length() < 2) ? String("0" + triStatePart) : triStatePart;
    triStateCode.concat(triStatePart);
  }
  char triState[triStateCode.length()];
  triStateCode.toCharArray(triState, triStateCode.length());

  if(on) {
    controlRCOutlets(triState);
    Serial.println("Light is off.");
    on = false;
  } else {
    controlRCOutlets(triState);
    Serial.println("Light is on.");
    on = true;
  }
}

void controlRCOutlets(const char* sCodeWord) {
  mySwitch.sendTriState(sCodeWord);
  delay(1000); 
}