[Tutorial] Frigate + Google Coral on Minisforum Venus Series
(NAB6/NPB6/NPB7/NPB5)
reddit / selfhosted

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lolKaiser · 2023-10-24 16:08

After wasting the better part of a week to figure this out, figured to
document this somewhere to save the next person trying this.

I had originally setup Frigate on the [recommended GK41
minipc](https://docs.frigate.video/frigate/hardware/#server), but it
was choking hard when running an 8 exterior camera setup (even using
the vga substreams, quicksync hw acceleration and two corals), let
alone expanding it to host a pair of wifi-cameras as well.

So I upgraded to a [Minisforum NAB6 with a 12th gen
i7](https://store.minisforum.com/products/minisforum-nab6) to keep the
dual NIC setup going, but the Coral GPUs would absolutely not work on
frigate, triggering the same error message every time and crashing
soon after:

    frigate.edgetpu                ERROR   : No EdgeTPU was detected.
If you do not have a Coral device yet, you must configure CPU
detectors.

What followed is an exercise in frustration as I tried to get the
corals working across multiple reinstalls and various OSs (Originally
Ubuntu 23.04, then Fedora 38 and finally Ubuntu 22.04) with no success
until I stumbled on [this frigate support
link](https://github.com/blakeblackshear/frigate/issues/2178) where
someone pointed out that [Coral USB modules need to be connected to
"primary" hub ports and that "sub-hubs" can't be
detected](https://coral.ai/docs/edgetpu/multiple-edgetpu/#performance-
considerations).

Investigating with "lsusb -t", it turns out that all (4) USB-A ports
on the miniPC are sub-hubs, with only the (3) USB-C ports in the pc
being primary ports.

Adding on to that, 1 of the 3 USB-C ports is in a different bus, which
also caused issues on detecting multiple corals (I have 2 installed).

So, for future reference: The "front" usb-c port and the usb-c in the
back of the case near the usb-a ports share a bus, with the second
usb-c port in the back (near the power plug) is in a different bus and
might still give issues with frigate.

​

Now frigate works perfectly, this new pc is a beast! :D

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thekrautboy · 2023-10-24 16:18

Might want to share this with /r/Frigate_NVR