🚀 go-pugleaf

Hello,

I'am learning how to use the javax.comm.SerialPort class with the SimpleRead
example found at
http://java.sun.com/products/javacomm/javadocs/API_users_guide.html

I have modified the code and added two lines...

    public SimpleRead() {
        try
        {
            serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
        } catch (PortInUseException e) {}
        try
        {
            is = serialPort.getInputStream();
            os = serialPort.getOutputStream();        // Added
            os.write("ATZ".getBytes());                // Added
        }
        catch (IOException e) {}
        ....
    }

When I use hyper terminal, "ATZ" has "OK" for reply... So the stuff seems to
work...
But when I use the following code from within Java:

    public void serialEvent(SerialPortEvent event) {
    switch(event.getEventType()) {
        ...
        case SerialPortEvent.DATA_AVAILABLE:
        System.out.println ("DATA_AVAILABLE");
        byte[] readBuffer = new byte[500];
        int readLen=0;
        byte b;
        try
        {
            while (is.available() > 0)
            {
                readLen = is.read(readBuffer);
            }
            System.out.println("Read="+readLen);
            for (int j=0; j<=readLen; j++)
            {
                b=readBuffer[j];
                System.out.println(j+" = "+b);
            }
        }
}

I have the following output...

DATA_AVAILABLE
Read=3
0 = 73
1 = -84
2 = -83
3 = 0

...which should be the string "OK", and now here's my question: How to
translate this 4 bytes reply to the ASCII string "OK" ?

OS: WinNT4 SP6
JC: Java version "1.2.2" Classic VM (build JDK-1.2.2-004, native threads,
symcjit) The JDK of JBuilder 3.5

Many thanks for any help...

Philippe.