Testing External control via UDP interface KUKA LBR iiwa

import java.net.*;
import java.util.concurrent.TimeUnit;
class UdpSample{
    public static void main(String args[]) throws Exception{
        DatagramSocket mySocket = new DatagramSocket(30001);

        // robot address (please adjust IP!)
        InetSocketAddress robotAddress = new InetSocketAddress("172.31.1.10", 30300);
        System.out.println("--> pre send");
        
        // get robot state
        
        byte[] msg = String.format("%d;1;Get_State;true", System.currentTimeMillis()).getBytes("UTF-8");
        
        
        System.out.println(String.format("%d;1;Get_State;true", System.currentTimeMillis()));
        mySocket.send(new DatagramPacket(msg, msg.length, robotAddress));
        System.out.println("--> after send");
        
        // receive answer state message
        byte[] receiveData = new byte[508];
        DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
        System.out.println("--> pre receive");
        mySocket.receive(receivePacket);
        
        
        System.out.println("--> blocked  before this statement");
        /*
        // extract counter
        String[] stateMessage = new String(receivePacket.getData()).split(";");
        long counter = Long.parseLong(stateMessage[2]);
        System.out.println("--> COUNTER");
        // start application by sending a rising edge
        // (false->true) for App_Start
        msg = String.format("%d;%d;App_Start;false",System.currentTimeMillis(), ++counter).getBytes("UTF-8");
        mySocket.send(new DatagramPacket(msg, msg.length, robotAddress));
        msg = String.format("%d;%d;App_Start;true",System.currentTimeMillis(), ++counter).getBytes("UTF-8");
        mySocket.send(new DatagramPacket(msg, msg.length, robotAddress));
        */

    }
}