How can I send the data from command window to Simulink using TCP/IP connection ?

I try to set up TCP/IP connection for MATLAB : tcpserver and tcpclient function can work normally (IP address : 'localhost' ,Port : 4000)

Similarly, Simulink side, TCP/IP Client Send and TCP/IP Client Receive blocks can work normally (IP address : 'localhost' ,Port : 4000) and using echotcpip('on',4000) to create server.

I want to create the TCP/IP conncetion to send the data by using TCP/IP function (tcpserver ,tcpclient, etc.) to Simulink side by using TCP/IP Client Receive block.

Note that I want to set up command window is Tx and Simulink is Rx.

Thus, command window side use tcpserver("localhost",4000) to create TCP/IP connection. However, the TCP/IP Client Receive block at Simulink side doesn't receive the data and show ERROR : Cannot create a communication link with the remote server.

How can I set up to send the data from command window to Simulink using TCP/IP connection ?

Thanks for your answer.

Answer 1

[Gojo]

Hey @Tanatsan,

I understand that you wish to send data from the MATLAB command window to a Simulink model.

For this you can create a TCP connection from MATLAB and set it as a server. Then you need to enter the same address and port number in the “TCP/IP Receive” Simulink block .

You can refer to the following example for setting up model parameters and establishing a connection in Simulink:

https://www.mathworks.com/help/instrument/send-and-receive-data-over-a-tcpip-network.html#brciyf3-1

For transferring data from the MATLAB Command Window to Simulink you can try out the following example:

https://www.mathworks.com/help/instrument/communicate-between-tcpip-client-receive-block-and-tcpip-server-in-matlab.html

I have tried the following at my end:

MATLAB script:

server = tcpserver('0.0.0.0',4000,ByteOrder="big-endian",ConnectionChangedFcn=@connectionFcn)
sim("simul.slx");

function connectionFcn(src, ~)
if src.Connected
    freq = 1;   % frequency (Hz)
    time = (0:1/(freq*100):1);
    amp = 1;    % amplitude (V)
    phi = 0;    % phase
    data = amp*sin(2*pi*freq*time+phi);
    write(src,data,"double");
end
end

Simulink Model:

Output Produced:

You can also refer to:

https://www.mathworks.com/help/instrument/examples.html?category=tcp-ip-interface&s_tid=CRUX_topnav

Hope this helps!!

[TK]

Thanks for the help!