TCPIP connection not working in matlab - matlab

Question

Can any body help me out with the problem I am facing while making a tcpip connection with an instrument.Its like when I make a connection with the tcpip address using the following it works perfectly fine for any no of times.
1.test and measurement tool(TMTOOL in matlab)
2.Zoc terminal
3.teraterm.
but when I try to implement the following script its does run but dont know some how doesn't seem to send the command to the pan and tilt unit which I am tryin to control.
I am trying with two scripts:
A.
obj1=tcpip('169.254.32.28',4000);
fopen(obj1);
cmd=5000;
fprintf(obj1,'pp%d',cmd)
fclose(obj1);
delete(obj1);
I am trying to send a command pp5000
B.
%commands
lat=51.57668;
lon=-1.26765;
alti=500;
% Find a tcpip object.
obj1 = instrfind('Type', 'tcpip', 'RemoteHost', '169.254.32.28', 'RemotePort', 4000, 'Tag', '');
% Create the tcpip object if it does not exist
% otherwise use the object that was found.
if isempty(obj1)
obj1 = tcpip('169.254.32.28', 4000);
else
fclose(obj1);
obj1 = obj1(1)
end
% Connect to instrument object, obj1.
fopen(obj1);
i=1;
tic
for i=1:10
% Communicating with instrument object, obj1.
fprintf(obj1, 'gg%f,%f,%f',lat,lon,alti);
i=i+1;
toc
end
fclose(obj1);
delete(obj1);
Desired result:
gg51.57668,-1.26765,500
The second script is just a little bit modified version of the automatic script generated from TMTOOL im matlab
Basically I want to print some commands on the desired object every half a second.
can anyone suggest some alternative or improvement that could be done to achieve the desired results.
I have been unable to execute these scripts and I think it should be correct with whatever small knowledge of matlab I have.I am a new user and I would appreciate if you could help.
Thanks
Salil

Answer 1

You could always use the Java classes (sockets) to pass data back and forth, it how I do it.
File 1:
import java.net.ServerSocket
import java.io.*
server_socket = ServerSocket(4000);
client_socket = server_socket.accept;
out = PrintWriter(client_socket.getOutputStream, true);
in = BufferedReader(InputStreamReader(client_socket.getInputStream));
str = in.readLine(); % Read in data
out.println(data); % send data
File 2:
import java.io.*;
import java.net.*;
server_socket = Socket('localhost', 4000);
in = BufferedReader(InputStreamReader(server_socket.getInputStream));
out = PrintWriter(server_socket.getOutputStream,true);
Get and send input the same way as above. When you're done don't forget to close everything.
out.close();
in.close();
client_socket.close();
server_socket.close();