通过网络发送数据

Question

I would like to create a program that will emulate a device connected to the network and send signals through a specific port.

The device is connected to the network and sends data through a port. On the server(or computer) I have running the CPR Manager v.4.3.0.1 from Lantronix that will associate the IP:PORT to a virtual COM port on the computer. I have a java program that listens to the COM ports and performs an action, this works great with the device.

I tried writing a java app using the Socket class to perform the connection but it was un successful, on the CPR side it only registers a Disconnect when the very first line is executed:

Socket socket = new Socket("192.168.1.160", 8888);

I also tried it using the UDP method and no message whats so ever is recorded.

Any help would be greatly appreciated. Also if there is no possible solution for Java then any other language would do fine.

EDIT:

Here is the Java code where I am attempting to send the data

  public static void main(String[] args){
    try{
      Socket socket = new Socket("192.168.1.160", 8888);

      if(socket.isConnected()){
          System.out.println("It is connected.");
          socket.setKeepAlive(true);
          System.out.println(socket.isBound());
      }else{
          System.out.println("It is not connected.");
      }
      PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
      BufferedReader in =
              new BufferedReader(
                        new InputStreamReader(socket.getInputStream()));
      String msg = "32";
      for(int i = 0; i < 50; i++){
          out.println(msg);
      }

      //Receive a reversed message
      msg = in.readLine();
      System.out.println("Server : " + msg);

    }catch(Exception ioe){
      ioe.printStackTrace();
    }
  }

Thanks.

Update

I got in contact with some people of the devices and they showed me that there is a way to communicate straight via a TCP/IP connection sending there ASCII Command Protocols. This would allow more in depth control at every level.

So, now I am writing a java program that can communicate using these protocols. Because, I am not using a comm port anymore I am tying to emulate the baud rate, data bits, stop bit stuff. I will post when I have some that works.

Thanks for all the help.

Answer 1

if the product you are using is forwarding the traffic to a COM port should you be listening on the COM port not on a network connection. Sockets are for network traffic. A quick google search resulted this for me. How to send data to COM PORT using JAVA?

Maybe that will help?