jssc (serialPort.readBytes() ) mit Arduino

Dies ist mein Java code:

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package jsscusbconnection;

import jssc.SerialPort;
import jssc.SerialPortEvent;
import jssc.SerialPortEventListener;
import jssc.SerialPortException;

/**
 *
 * @author Heshan
 */
public class JsscUsbConnection {

    /**
     * @param args the command line arguments
     */
    static SerialPort serialPort;

    public static void main(String[] args) {
        serialPort = new SerialPort("COM15");
        try {
            System.out.println("port open :" + serialPort.openPort());//Open port
            serialPort.setParams(SerialPort.BAUDRATE_9600,
                    SerialPort.DATABITS_8,
                    SerialPort.STOPBITS_1,
                    SerialPort.PARITY_NONE);

            int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;//Prepare mask
            serialPort.setEventsMask(mask);//Set mask
            serialPort.addEventListener(new SerialPortReader());//Add SerialPortEventListener
        } catch (SerialPortException ex) {
            System.out.println(ex);
        }
    }

    static class SerialPortReader implements SerialPortEventListener {

        public void serialEvent(SerialPortEvent event) {
            if (event.isRXCHAR()) {//If data is available
                //System.out.println(event.getEventValue());
                if (event.getEventValue() > 4) {//Check bytes count in the input buffer

                    //Read data, if 10 bytes available
                    try {
                        byte buffer[] = serialPort.readBytes(4);

                        System.out.println(buffer[0] + "  " + buffer[1] + "  " + buffer[2] + "  " + buffer[3]);
                    } catch (SerialPortException ex) {
                        System.out.println(ex);
                    }
                }
            } else if (event.isCTS()) {//If CTS line has changed state
                if (event.getEventValue() == 1) {//If line is ON
                    System.out.println("CTS - ON");
                } else {
                    System.out.println("CTS - OFF");
                }
            } else if (event.isDSR()) {///If DSR line has changed state
                if (event.getEventValue() == 1) {//If line is ON
                    System.out.println("DSR - ON");
                } else {
                    System.out.println("DSR - OFF");
                }
            }
        }
    }
}

Dies ist mein Arduino code:

int k=0;

void setup(){
    Serial.begin(9600);
}

void loop(){
    Serial.println(67,BYTE);
    Serial.println(98,BYTE);
    Serial.println(34,BYTE);
    Serial.println(108,BYTE);
    Serial.flush();
}

Diese meine Ausgabe des Java-code:

67 13 10 98

13 10 34 13

10 108 13 10

67 13 10 98

Was sind die Fett Werte? Ich habe keine Ahnung über diese unbekannten Werte.