Voxl2 reboot due to what it seems a power limitation

Riccardo Franceschini

Hi,

after experimenting, we found that the problem was a RealSense external camera that we plugged in.

It was connected through USB via the 5G module. Probably, this was causing a short circuit or overload of the board. Anyway, modifying the connection cable so that only the data goes through the board while it is powered separately seems to solve the problem.

Alex Kushleyev

Great to hear you got it figured out!

Vinny

Hi @Riccardo-Franceschini
Our USB hubs have a smart power switch with a message feature that relays back to the host if there is an error/over-current condition on VBUS.
It might be that is what was causing the reset.
But yeah, glad you figured it out!!
Nice work!

Vinny

@Riccardo-Franceschini For future note, this page here lists all the VBUS capabilities in our designs so you know which port (if any) can support your high current use cases:
https://docs.modalai.com/expansion-design-guide/#usb-expansion-over-j3--j5

voxltester

@Vinny

I have the rebooting issue with a VOXL2 flight deck with Microhard radio.

I have tested with 5G board (M0090-3-01) as well. I connected a USB3 ethernet adapter on the 5G board to communicate with my laptop through ethernet cable. The same issue happened.

When I directly powered the system by using a power supply (5V) without a power module, it did not show any rebooting issue....
I am still figuring out, so please let me know what I need to try...

Vinny

Hi @voxltester
Please take a look at this old thread: https://forum.modalai.com/topic/1356/sentinel-drone-randomly-reboots?_=1673383475709

Let us know if that issue with J5 is what is happening.

It is unlikely you are pulling too much current in normal operations as you more than likely have a fault if you think the 5V is drooping.

Thanks!
Vinny

voxltester

@Vinny

I will have a look.

This is very randomly happening...
I changed power source (battery, wall power), but it is working well now...

Is there any way to check GPU usage on VOXL2?

Eric Katzfey

@voxltester voxl-inspect-cpu will show you GPU utilization and temperature

voxltester

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voxltester

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