Externally Powered Cables Causes OAK to Never Boot Off

Aaron

Hi, I'm running an application where I am using 10 metre externally powered 3.0 active usb extension cords with my OAK-1 MAX's. The issue is that occasionally, if a camera disconnects from the application/computer, it will remain powered due to the external power from the extension cable despite losing signal/power from the computer. This locks the OAK into a limbo state where it cannot be detected again but will never power off because power is still being supplied to it through the external cable. Is there any way at all to mitigate this issue?

jakaskerl

Aaron
Typically when device loses connection, it will reboot into a different USB state, regardless of whether it still has power. Have you tried searching for the device via lsusb or some other USB debugging tool?

Thanks
Jaka

Aaron

Thanks for the reply!

Interesting, what do you mean by boots into a different USB state? I don't think I've tried exactly lsusb (the issue is sporadic and hard to reproduce so testing has been difficult) but I know the issue causes at least my Python program to not be able to find the camera, and will continue not to be able to find the camera until I manually unplug and replug in the camera from the external power.

This is in contrast to "normal" XLink errors on my unpowered cables. It seems like when the device loses connection there, the program is readily able to refind the camera on program restart.

jakaskerl

Aaron
If sporadic, you can use dmesg to check. You should see a log of USB disconnect, then reconnect on different PID while VID stays the same.

Thanks,
Jaka