UDP Receive and Send Matlab

Question

I am currently working on receiving packets of data from an external device and then ill be sending data to another device. I having a working Simulink model however i don\'t kn

Answer 1

This should work:

clc();

echoudp('on',25000);

u = udp('127.0.0.1',25000);
u.InputBufferSize = 10000;
u.OutputBufferSize = 10000;
u.ReadAsyncMode = 'continuous';
u.BytesAvailableFcn = @BytesAvailable_Callback;
u.BytesAvailableFcnMode = 'terminator';

fopen(u);

if (~strcmp(u.Status,'open'))
    NetworkError(u,'Connection failed!');
end

try
    for i = 1:10
        fprintf(u,'Hey!');
    end
catch e
    NetworkError(u,['Communication failed! (' e.message ')']);
end

pause(1);

NetworkDispose(u);

function BytesAvailable_Callback(u,evt) %#ok<INUSD>
    data = fscanf(u);
    disp('Data Received!');
    disp(data);
end

function NetworkDispose(u)  
    fclose(u);
    delete(u);
    clear u;

    echoudp('off');
end

function NetworkError(u,msg)
    NetworkDispose(u);
    error(msg);
end

This sets up a continuous (and asynchronous) listening over UDP. For more information read this.