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How to store continuous serial data from COM port

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Joes Lanters
Joes Lanters on 27 Oct 2020
Commented: Walter Roberson on 30 Oct 2020
I want to be able to store my data from a scale that I have connected to my laptop via a COM port. I have the following code, but it only shows the values in the Command Window:
% Assign port to s
s = serialport("COM3",9600);
configureCallback(s,"terminator",@readSerialData)
function readSerialData(src,~)
data = readline(src);
disp(data)
end
What can I do to store it in a variable?

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Answers (1)

Amrtanshu Raj
Amrtanshu Raj on 30 Oct 2020
Hi,
You can achieve the required function using a global variable. They allow you to share variables across multiple functions and scripts. Here you can use a global array and add a value to it in the callback.
Hope this helps !!

  1 Comment

Walter Roberson
Walter Roberson on 30 Oct 2020
We recommend against global variables!! They should only be used as a last resort or if for some reason the performance would be significantly improved by using global variables (which would take some doing, as global variables are the slowest kind of variables.)

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