Arduino_and_RDM630_RFID_module_2.ino

/*
 * Arduino and RDM630 RFID module
 * www.KendrickTabi.com
 * http://www.kendricktabi.com/2015/04/arduino-and-rdm630-rfid-module.html
 */
 
 #include <SoftwareSerial.h>
 
SoftwareSerial RDM630 = SoftwareSerial(2,3); // RFID

char rfid;
String dx;

const int buzzer = 4; // Pin 4 connected to Buzzer

void setup() {
  Serial.begin(9600);
  RDM630.begin(9600);
  pinMode(buzzer, OUTPUT);
}
 
void loop() {
  while(RDM630.available()>0) {
    rfid = RDM630.read();
    dx += rfid;
  }
  
  if (dx.length() > 10) {
    dx = dx.substring(1,13);
    Serial.print("RFID code: ");
    Serial.println(dx);
    buzzerbeep();
  }
  
  dx = ""; // clear
  delay(1000);
}

void buzzerbeep() {
  digitalWrite(buzzer, HIGH);
  delay(100);
  digitalWrite(buzzer, LOW);
  delay(100);
  digitalWrite(buzzer, HIGH);
  delay(100);
  digitalWrite(buzzer, LOW);
}