 #include <SoftwareSerial.h> 
+
+
 
 /* RFID Reader
    Uses RDM880 breakout board with RX connected to pin 2 and TX connected to pin 3. 

        endTime = (millis() - startTime)/1000;
        if (endTime != 0) {
          Serial.print("Elapsed time: ");
          Serial.println(endTime);
        }
        previousState = signalState;
        standby = true;

}

void loop() { 
  // send command packet to RDM880 to read serial number every second
  RDM880.write(get_readID, 8);
  delay(100);
  digitalWrite(ledPin, LOW);
  response[7] = NULL;
  standby = true;

  // read response packet from RDM880 and print
  int i = 0;
  while(RDM880.available()) {
    response[i] = RDM880.read();
