[scotty1024]

OK, got this all figured out.

Port number is 50555.

root@ereader:/usr/bin# displayMgrClient -d 10.0.1.2

From: /10.0.1.3 length: 6 data: 21302c312c30 ascii: !0,1,0

root@ereader:/usr/bin# displayMgrClient -d 10.0.1.2 -t

From: /10.0.1.3 length: 21 data: 21312c312c302c342c3939362c3730302c31303230 ascii: !1,1,0,4,996,700,1020

root@ereader:/usr/bin# displayMgrClient -d 10.0.1.2 -p

From: /10.0.1.3 length: 22 data: 21312c312c302c3130302c3130302c3330302c333030 ascii: !1,1,0,100,100,300,300
From: /10.0.1.3 length: 22 data: 21312c312c302c3530302c3730302c3730302c393030 ascii: !1,1,0,500,700,700,900

Example server code:

import java.net.DatagramSocket;
import java.net.DatagramPacket;

public class Display {

    public static void main(String[] args)
        throws Exception
    {
        byte[] buf = new byte[256];
        DatagramSocket s = new DatagramSocket(50555);
        DatagramPacket p = new DatagramPacket(buf, 256);
        while (true) {
            s.receive(p);
            System.out.println("From: " + p.getAddress() + " length: " + p.getLength() + " data: " + toHexString(buf, p.getLength()) + " ascii: " + new String(buf, 0, p.getLength()));
        }
    }

    public static String toHexString(byte bytes[], int length) {
        StringBuffer retString = new StringBuffer();
        for (int i = 0; i < length; ++i) {
            retString.append(Integer.toHexString(0x0100 + (bytes[i] & 0x00FF)).substring(1));
        }
        return retString.toString();
    }
}

Example client code to refresh entire display from Wonka:

import java.net.DatagramSocket;
import java.net.DatagramPacket;
import java.net.InetAddress;

public class Client {

    public static final int DISPLAY_MGR_PORT = 50555;
    private static final byte[] ENTIRE_DISPLAY = "!0,1,0".getBytes();

    public static void main(String[] args)
        throws Exception
    {
        refreshEntireDisplay();
    }

    public static void refreshEntireDisplay()
        throws Exception
    {
        DatagramPacket p = new DatagramPacket(ENTIRE_DISPLAY,
                                              ENTIRE_DISPLAY.length,
                                              InetAddress.getLocalHost(),
                                              DISPLAY_MGR_PORT);
        DatagramSocket s = new DatagramSocket();
        s.send(p);
        s.close();
    }
}

Tested, works.

Now I just need to go find where to bury the code in Wonka's AWT implementation...