OAK-1 Multi connection

RyanLee

Hi
We want to connect two OAK-1 to host at the same time. And we are using the usb3 cables provided in the box now.
But they is something strange. If we connect just one of OAK-1 to host, it is working as USB3(Super) mode. and it is the same with another OAK-D we have. it is work as a USB3 super mode as we expected.

But if we connect two OAK-1 at the same time, one of that is working as USB2(High) and the other one is working as USB3(Super) mode. Have you experience with this??

And we did one more test. to verify our test environment. just we connect two OAK-1 to host at the same time but in case we switch one of its cable to another vendor which is not from luxonis. In this case, both are working as USB3(Super) mode.

So as a summay of my question. i think when we use USB3 cable provided by luxnonis with two OAK-1 at the same time, one of it is not working as USB3. it is working as USB2 now. could you please check it out?

Source code they tested.
https://drive.google.com/drive/folders/1JSgbaNWp3BHDGzMFH1UGiLSVTPq33lKC?usp=sharing

Thanks.

erik

Hello RyanLee ,
I think it could be a problem with USB hub on your host machine - or with USB hub if you are using one. I have connected 2 USB OAK cams to different USB3 ports on my computer and it works as expected:

Thanks, Erik

RyanLee

Hi EriK,

i have a question. is it the same with OAK-1? But our user who have OAK-1 keep complain about this issue. The issue is like below. and they said they tested it several ubuntu PC and the percetage is very high not 100% but almost 40%. Have you got this problem from another customers??

Again they tested like below.
When they plug-in both together, one of that detected as a usb2 and the other one is usb3. So they try to change its cable which is detected as a usb2. than it is working as a usb3. And the cable is provided from luxonis in the box.

Best regards,
Ryan.

erik

Hi RyanLee ,
You mentioned 40%, is that CPU usage? I wouldn't consider that high - it's an small embedded CPU on there that's doing a bunch of work (even though from user perspective it's "just streaming some frames").

Regarding 2x USB3 not working - I would assume it's a problem of computer. Could you try a different computer and plug both OAK cameras into USB3 port?
Thanks, Erik