I keep getting this error...

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');

Answer 1

[Chris]

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.

[Abrahim]

Thanks a lot, the clear; workout. Apparently i did have a in my workspace.

[Chris]

You're welcome.