Hello,
We are developing an android app for device communication using MODBus Protocal.
Please refer link for solution architecture diagram


We have used the following downloaded libraries Tools.

jamod-1.2-SNAPSHOT.jar has been downloaded from
http://sourceforge.net/projects/jamod/files/latest/download?source=files

mod_RSsim.exe has been downloaded from
http://sourceforge.net/projects/modrssim/


PROBLEM
we can connect android APP with modbus simulator(mod_RSsim.exe) using socket connection. but we couldn't write and read values from registers using functions from "jamod-1.2-SNAPSHOT.jar".

we got output like this 00 00 00 00 00 06 00 03 00 00 00 00 when we use

WriteMultipleRegistersRequest wrq = new WriteMultipleRegistersRequest();
wrq.getHexMessage();

what is the correct function to read and write for registers in modbus simulator using "jamod-1.2-SNAPSHOT.jar".

Our Program<pre>
package com.example.smodbus;

import java.io.BufferedWriter;
import java.io.DataOutput;
import java.io.IOException;
import java.iutputStreamWriter;
import java.net.Socket;
import java.net.UnknownHostException;

import net.sourceforge.jmodbus.Modbus;
import net.wimpi.modbus.io.ModbusTCPTransaction;
import net.wimpi.modbus.msg.ReadInputRegistersResponse;
import net.wimpi.modbus.msg.ReadMultipleRegistersRequest;
import net.wimpi.modbus.msg.WriteMultipleRegistersRequest;
import net.wimpi.modbus.msg.WriteSingleRegisterRequest;
import net.wimpi.modbus.procimg.Register;
import net.wimpi.modbus.procimg.SimpleRegister;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements Runnable
{
private Button buttonSum;
ModbusTCPTransaction trans=null;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

addListenerOnButton();

}
public void addListenerOnButton(){

buttonSum=(Button)findViewById(R.id.button1);

buttonSum.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View view) {

new conect().execute();


}

});
}
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public void run() {
// TODO Auto-generated method stub

}


private class conect extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {

try {
int port=502;
Socket s = new Socket("192.168.56.2", port);

BufferedWriter out = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

String outMsg = "TCP connecting to " + port + System.getProperty("line.separator");
Log.i("TcpClient", "sent: " + outMsg);
SimpleRegister[] registers = new SimpleRegister[1];
registers[0] = new SimpleRegister(15);
WriteMultipleRegistersRequest req = new WriteMultipleRegistersRequest(400001, registers);

Register ras = new Register() {

@Override
public int toUnsignedShort() {
// TODO Auto-generated method stub
return 0;
}

@Override
public short toShort() {
// TODO Auto-generated method stub
return 0;
}

@Override
public byte[] toBytes() {
// TODO Auto-generated method stub
return null;
}

@Override
public int getValue() {
// TODO Auto-generated method stub
return 0;
}

@Override
public void setValue(byte[] arg0) {
// TODO Auto-generated method stub

}

@Override
public void setValue(short arg0) {
// TODO Auto-generated method stub

}

@Override
public void setValue(int arg0) {
// TODO Auto-generated method stub

}
};

ras.setValue(40001);
ras.getValue();

WriteSingleRegisterRequest wrq = new WriteSingleRegisterRequest(Integer.decode("5").intValue(), ras);




ReadMultipleRegistersRequest rea=new ReadMultipleRegistersRequest();
rea.getHexMessage();

DataOutput dout = new DataOutput() {

@Override
public void writeUTF(String str) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeShort(int val) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeLong(long val) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeInt(int val) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeFloat(float val) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeDouble(double val) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeChars(String str) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeChar(int val) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeBytes(String str) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeByte(int val) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void writeBoolean(boolean val) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void write(byte[] buffer, int offset, int count) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void write(int oneByte) throws IOException {
// TODO Auto-generated method stub

}

@Override
public void write(byte[] buffer) throws IOException {
// TODO Auto-generated method stub

}
};

rea.writeData(dout);
System.out.println();

//register values
System.out.println(rea.getHexMessage());




out.write(outMsg);
out.flush();
s.close();

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}


return null;
}

@Override
protected void onPostExecute(String result) {

}
}
}</pre>
Looking forward to hear from someone.
Thanks for your help.
Please reply
[email protected]

 

Hi,

I suggest to you a freeware software for communication with Modbus TCP/RTU devices.

It is very easy to use AVReporter Android Mobile Client.

http://www.konsys-international.com/news/404/AVReporter-Mobile-Client

 

Have you considered integrating an existing off-the-shelf driver in with your own android app? I'd suggest taking a look at the ICC NetLink Modbus/TCP Plugin on the Google Play market:

play.google.com/store/apps/details?id=com.iccdesigns.netlink.modbus

It's designed to integrate seamlessly with your own app, has full 3rd-party integration documentation, and has a variety of useful features like SQL database integration, auto-discovery and RTU-over-TCP. Using this, you can focus exclusively on the user interface details of your app while not having to concern yourself with any communication-level details.

Darrin

 

Have you tried the HMI Droid app?

http://www.idea-teknik.com/en/hmi_droid.html