| RFID reading by BARRAGAN <http://barraganstudio.com> Demonstrates how to read data from a Parallax RFID reader connected to the Serial1 serial port and print the tag number through the Serial serial port. created 30 April 2006 |

    // RFID reading
    // by BARRAGAN <http://barraganstudio.com>

    byte val;
    char code[10];
    int bytesread = 0;

    void setup() {
     Serial1.begin(2400); // RFID reader SOUT pin connected to Serial1 RX pin at 2400bps
     Serial.begin(9600);  // Serial set to 9600
     pinMode(0,OUTPUT);   // Ser digital pin 0 as OUTPUT to connect it to the RFID /ENABLE pin
    }

    void loop() {
      digitalWrite(0, LOW);                  // Activate the RFID reader
      if(Serial1.available() > 0) {          // if data available from reader
        if((val = Serial1.read()) == 10) {   // check for header
          bytesread = 0;
          while(bytesread<10) {              // read 10 digit code
            if( Serial1.available() > 0) {
              val = Serial1.read();
              if((val == 10)||(val == 13)) { // if header or stop bytes before the 10 digit reading
                break;                       // stop reading
              }
              code[bytesread] = val;         // add the digit
              bytesread++;                   // ready to read next digit
            }
          }
          if(bytesread == 10) {              // if 10 digit read is complete
            Serial.print("TAG code is: ");   // possibly a good TAG
            Serial.println(code);            // print the TAG code
          }
          bytesread = 0;
          digitalWrite(0, HIGH);             // deactivate RFID reader
          delay(1000);                       // wait for a second
        }
      }
    }

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