Error in opening MATLAB device file for LED trigger source.
显示 更早的评论
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:
I got to the first step, ran the code
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.
Any help please? I followed the tutorials accurately on the MathWorks website
6 个评论
Walter Roberson
2023-4-13
I see a hint that just maybe your raspberry pi might already have a startup program that is using ROS (robot operating system) and so the node might already be busy
This is a bit of a stretch, but it is not impossible.
If something like this were true then removing the startup program should work. Or flip to a new mini-SD memory card and reinstall the operating system.
Syed Hadi
2023-4-14
Walter Roberson
2023-4-14
Sorry, I do not know.
Joaquin Dillen
2023-4-23
i got the same issue... any news about this??
Syed Hadi
2023-4-26
Atakan Aral Ormanci
2023-4-27
I am getting the same error, i have checked the /sys/class/leds directory, it doesn't have led0 led1 led2. This might be causing the problem, i believe it has a function that when matlab is connected to RPi, it uses the leds, but in the connection phase, becouse it doesn't have the led0 activation command in the directory, it doesn't allow the connection.
But its just a guess.
采纳的回答
2 个评论
Beryl Wicaksono
2023-6-5
Hi Syed Hadi,
are you facing ssh certificate issue after installing 2022-09-22-raspios-bullseye-armhf.img.xz? How do you resolve it?
Thanks
Prasanth Sunkara
2023-9-11
编辑：Walter Roberson
2024-6-30
In my opinion using the official Raspberry Pi Imager tool is a better way to setup an image.
Please ensure you have enabled SSH and assigned proper hostname and user credentials. You may optionally enter the WiFi details as well.
There is an option in the Raspberry Pi imager tool to flash images from your PC too. Towards the end the list
更多回答（2 个）
MathWorks MATLAB Hardware Team
2023-5-8
移动：Walter Roberson
2023-5-8
5 个投票
Hi All,
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');
Thanks,
MathWorks
MATLAB Hardware Team
4 个评论
Syed Hadi
2023-5-9
Antonios Gementzopoulos
2023-5-17
I have just tried it and it works as advertised.
Beryl Wicaksono
2023-6-29
This solution is also work. I have tried it.
sajid ali
2024-6-29
wonderful, it worked for me as well, thank you guys
Sandin Taci
2023-5-4
rpi = raspberrypi('IP Address','username','password')
3 个评论
Atakan Aral Ormanci
2023-5-4
Hey @Sandin Taci
I just checked and it worked. it says its connected.
But there is still a problem. I just tried the starter kit, but it gives the same error. cannot open or find LED.
Sandin Taci
2023-5-4
Can you go through these steps again, I guess you skipped a step. Your hardware tab in the Simulink model does not look customized.
https://www.mathworks.com/help/supportpkg/raspberrypi/ref/getting-started-with-raspberry-pi-hardware.html
Atakan Aral Ormanci
2023-5-4
编辑：Atakan Aral Ormanci
2023-5-4
i just did the steps again and then i realised the problem is with the led.
i then tried to control a servo and it worked.
类别
在 帮助中心 和 File Exchange 中查找有关 MATLAB Support Package for Raspberry Pi Hardware 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
