I keep getting this error...

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Abrahim
Abrahim on 17 Sep 2022
Commented: Chris on 17 Sep 2022
I am new to Matlab, and I am trying to create a blinking LED program using an arduino. After I have finished setting up my arduino and my program. I kept encountering the same error and I don't know how to fix it. The error saids, "MATLAB connection to Uno at COM3 exists in your workspace. To create a new connection, clear the existing object".
The following is my program:
a=arduino;
for i=1:10
writeDigitalPin(a,'D13',1);
pause(0.5);
writeDigitalPin(a,'D13',0);
pause(0.5);
end
disp('Done');

Answers (1)

Chris
Chris on 17 Sep 2022
Edited: Chris on 17 Sep 2022
In your workspace, does a already exist, or some other arduino object?
if so, type clear a (or the other relevant object) in the command window. You could put that at the end of your program to try and avoid these errors in the future.
Or, as many do, simply put clear; close all at the beginning of your programs to clean the slate at the start.
  2 Comments
Chris
Chris on 17 Sep 2022
You're welcome.

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