how to avoid tcpclient function open new ports all the time ?

Hi,

does anyone know how to avoid Matlab open a new port, everytime something received via tcp ?

Cant find anything about it in the documentation but opening and closing a port decreases performance a lot.

t = tcpclient("192.168.11.1",1045,"Timeout",1,"ConnectTimeout",300);
            
    
            
            
            %configureCallback(t,"byte",4,@readbytesfunction);
            %t.BytesAvailabeFcn = @readbuffercallback; %if condition reached go to callback;
            %readasync(t);;
            %data2 = 0;
            %data = int8(data2);
            %write(t,data);
           
            datareceive = read(t,4,"uint8");  
            app.ServerantwortEditField.Value = int2str(datareceive);
            
           
            

with matlab2021a the old functions doesnt work anymore.

I just want to open a socket connection with one port and pass data through continiously.

Thanks.

Answer 1

[Zinea]

Hi Kaan Inal,

When working with the ‘tcpclient’ object, it is not necessary for the client to open a new port each time it receives data. Instead, it should establish a single connection to the server and then continuously read from or write to that connection.

Here is an example code for your peruse:

while true 
    % Check if data is available to read 
    if t.BytesAvailable > 0 
        datareceive = read(t, t.BytesAvailable, "uint8"); 
        app.ServerantwortEditField.Value = int2str(datareceive); 
    end 
    
    % Include a condition to break out of the loop and close the connection 
end