OAK-D Lite depthai_demo.py Communication Exception Error

rb210002

I am encountering a 'Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: 'color' (X_LINK_ERROR)' error when trying to run the depthai_demo.py script with my OAK-D Lite camera. I have tried to troubleshoot the issue by checking the camera connections and drivers, but I am still encountering the same error. Does anyone have any suggestions for how to resolve this?

I have received an OAK-D Lite camera in the December 2021 launch batch

rb210002

Hi Team,
Looking for a resolution. Kindly help.

Regards

erik

Hi rb210002 ,
We apologize for the delay. Are you using latest depthai version (python library, should be 2.20.2) and latest depthai_demo version (commit)? Have you went through troubleshooting docs? Please provide terminal outputs of steps, so we can suggest next steps.
Thanks, Erik

rb210002

Hi erik thanks for replying, I was able to fix the problem by installing the Windows DepthAI installer and switching from a USB2 to a USB3.1 cable.

I do have another question for you though. When running the depthai_demo.py and using different CNN models, my OAK-D lite device gets very hot to the point where I can't touch it. Is this normal, or is there an issue with my device? Do you happen to have any solutions to address this problem?

Here is the ss of the temperature now it seems normal but when I was running the demo_depthai.py file at that time temperature was very high.

erik

Hi rb210002 ,
Great that you it working! This is quite normal - chip temp can go up to 105°C, docs here.
Thanks, Erik

rb210002

erik ,
I have come across some posts where individuals are experiencing the same temperature issue, and in some cases, it has even led to device failure. Is it normal for the OAK-D lite to heat up to such an extent?

erik

Hi rb210002 ,
No, that was a HW errata where enclosure wasn't pressed to the SoC, so it overheated quite quickly. It was the case only for initial batch of OAK-D-Lite FF. Thoughts?
Thanks, Erik

rb210002

erik ,

I received an OAK-D Lite device as part of the initial batch from the Kickstarter campaign in Nov-Dec 2021. Since your message mentions a problem that could potentially affect devices from that batch, I'm wondering if my device might be affected as well. Can you please provide more information on the issue and how to check if my device is affected?

My Order no is #OAK3550

erik

Hi rb210002 ,
If the device crashes and throws an error like above 105°C, shutting down pipeline, report to support then it's likely affected, otherwise it isn't. I hope this helps!
Thanks, Erik