Posts: 1
Joined: Fri Apr 14, 2023 8:41 am

Error in opening MATLAB device file for LED trigger source.

Fri Apr 14, 2023 8:53 am

Hi, I am using the 'MATLAB support package for Raspberry Pi hardware' using MATLAB 2023a. I have installed all the necessary files on the Pi. I began following the tutorial here:

https://uk.mathworks.com/help/supportpk ... dware.html

I got to the first step, ran the code below in MATLAB:

rpi = raspi('IP Address','username','password');

and was met with the following error (Practice_1 is the name of the script):

Error using Practice_1
Cannot open the device file for LED trigger source.

I found this forum on the MathWorks website:

https://www.mathworks.com/matlabcentral ... wer_888865

and followed the steps, but when I run the code:

rostopic list

I'm met with "bash: rostopic: command not found". This is the same with any other command from that post.

I posted my own question on the MathWorks forum but not getting much traction.

Any help or suggestions?

Posts: 1
Joined: Thu Sep 21, 2023 4:17 am

Re: Error in opening MATLAB device file for LED trigger source.

Thu Sep 21, 2023 4:25 am

Follow these steps to resolve the issue,
Open Raspberry Pi terminal and execute
$ cd /opt/MATLAB/
$ sudo pkill mwUnifiedSrvr
$ sudo rm -rf *
Download and extract following zip files
In MATLAB, change your working directory to the above extracted files
Run >> applyPath.m file
Create a raspi object in matlab
>> r = raspi("myAddress",'pi','raspberry');

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