 byte productID[] = { 0x0, 0x0, 0x10 };
 
 int ledPin = 13;
+
+int ledValue = 0;
+
+byte comPing      = 0x1;
+byte comBack      = 0x2;
+byte comGet       = 0x3;
+byte comSet       = 0x4;
+byte comReturn    = 0x5;
 
 void setup() {
   Serial.begin(9600, SERIAL_8O1);


          handleDataChange(dataType, value);

          byte header = createHeader(B110);
          byte confirmationMessage[4] = { header, data[1], data[2], data[3]};

          Serial.write(confirmationMessage, 4);
        }
        else if (kom == B100)
        {
          byte header = createHeader(B111);
          byte pingback[4] = { header, productID[0], productID[1], productID[2] };

          Serial.write(pingback, 4);

      if (data[0] >> 3 == id){
        byte kom = data[0] & B00000111;
        
        if (kom == comSet)
        {
          byte dataType =  data[1];
          int value = data[2];
