Serial communication RFID reader to Processing

RFID reader
The Lab has a number of readers from Sparkfun which can be easily hooked up to a computer via mini-USB.

Processing code to receive:

import processing.serial.*;

Serial rfidPort;
String currentTag = "";

String authorizedTag = "01023C1DCAE8";  // Replace with your RFID tag ID

void setup() {
  size(400, 200);

  println(Serial.list());  // Show available serial ports

  // Change the index to match the USB-port for your RFID reader
  rfidPort = new Serial(this, Serial.list()[3], 9600);

  // Trigger serialEvent() when a newline is received
  rfidPort.bufferUntil('\n');
}

void draw() {
  //in this example, nothing happens here
  background(240);
}

void serialEvent(Serial port) {

  currentTag = port.readStringUntil('\n');

  if (currentTag != null) {

    // Removing whitespace, CR, LF characters
    currentTag = trim(currentTag);

    println("Tag detected: " + currentTag);

    if (currentTag.equals(authorizedTag)) {
      println("I know this one!");
    }
    else {
      println("Never seen this one!");
    }
  }
}

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