 #define SEND_DATA
 // read photo resistor (LDR)
 #define USE_LDR
+// use up to four LEDs, will blink
+#define USE_LEDS
 
 #ifdef DEBUG
  // http://arduiniana.org/libraries/streaming/

  SEND_LDR(ldr_value);
#endif // USE_LDR

  SEND_SYNC(2);
  
  gCycleCounter = ( gCycleCounter == 0x1ff ) ? 0 : (gCycleCounter+1);


#ifdef READ_SENSORS
  if ( sensors.getDeviceCount() > 0 ) {
    
    sensors.requestTemperatures(); // Send the command to get temperatures

    float temp;
