Modbus datalogging in an App

Hello all

I am currently trying to develop an instrumentation and control panel for an experiment which interfaces using Modbus RTU. I have a code snippet below for the logging. However ideally, I would also like to be able change some digital output on the device by clicking a button on the computer. The only way I can think of doing this is with an App with callbacks any time the button is pressed. However, since I need to poll the device I can't use a callback for the logging and so can't work out to keep it running continually. Any advice would be greatly appreciated.

Thanks,

Martin

close all

m = modbus('serialrtu', 'COM4');
m.Timeout = 3;

serverId = 2;

data = read(m, 'holdingregs', 1, 1, serverId, 'int16');
t = 0

tic
while 1==1
    
    data = [data;read(m, 'holdingregs', 1, 1, serverId, 'int16')];
    t = [t,toc];
    plot(t,data)
    drawnow
    pause(1)
end
    
clear m

Answer 1

[Martin O'Connor]

I have done some further digging and realised I should probably use a timer object. Apologies for the preemptive post.

https://uk.mathworks.com/matlabcentral/answers/297381-how-to-implement-a-timer-in-appdesigner