Raspberry Pi depthai_demo.py error "No DepthAI device found"

TaylorPresley

I'm following the tutorials with Raspberry Pi OS Bullseye.

After installing depthai and dependencies, depthai_demo.py will run with "starting demo..." where video should be. Popup occurs with the following error:
File "/home/raspberrypi/depthai/depthai_demo.py", line 655, in run
self.instance.run_all(self.conf)
File "/home/raspberrypi/depthai/depthai_demo.py", line 131, in run_all
self.setup(conf)
File "/home/raspberrypi/depthai/depthai_demo.py", line 179, in setup
self.deviceInfo = getDeviceInfo(self._conf.args.deviceId,args.debug)
File "/home/raspberrypi/depthai/depthai_sdk/src/depthai_sdk/utils.py", line 141, in getDeviceInfo
raise RuntimeError("No DepthAI device found!")
RuntimeError: No DepthAI device found!

I've included permissions as documented in installation instructions:
echo 'SUBSYSTEM=="usb", ATTRS{idVendor}=="03e7", MODE="0666"' | sudo tee /etc/udev/rules.d/80-movidius.rules
sudo udevadm control --reload-rules && sudo udevadm trigger

I've tried both RPi 4b and RPi 3B+, multiple sets of cables (surely one works?), and tried forcing USB2.

lsusb shows 03e7, which means it does recognize it...

What am I missing? Apologies if this isn't the right place to put this discussion.

Taylor

erik

Hello TaylorPresley ,
Usually we suggest checking this troubleshooting guide when you can't connect to OAK. I would also suggest checking our preconfigured RPI image. I hope this will help!
Thanks, Erik

andymassey

Hi TaylorPresley

I had same issue as you.

I wasn't able to use the Luxonis preconfigured image because already using a different preconfigured image for some other software.

@erik's suggestion for the troubleshooting guide is good, and it was indeed because the dev rules hadn't been set on my RPi. But being a newbie I struggled to do this...

My situation and how I resolved:

Couldn't run the two commands in the "fix" on the troubleshooting guide page, because it threw an error "unable to resolve host..."
So before I could set the dev rules I had to fix the host name:
sudo cat /etc/hosts
Add 127.0.0.1 {NAME-OF-HOST}
Exit and save
Then went back and ran the two commands in the troubleshooting page fix
Unplugged / replugged the OakD
Ran python3 ColorCamera/rgb_preview.py again, and BINGO! The window with camera view opened

Hope this helps you!

Andy

TaylorPresley

Thanks @erik and @andymassey

I was able to get the demo working with a preconfigured RPi image, but like andy, I'm using another preconfigured image for other software.

I will try again following your suggestion and report back.

Thanks,
Taylor

erik

Hi TaylorPresley ,
Maybe you could follow the steps we took (linked also from the RPI docs) to create the preconfigured RPI image, it might be helpful.
Thanks ,Erik