Voxl2 reboot due to what it seems a power limitation
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@Alex-Kushleyev @Riccardo-Franceschini
This is most certainly not a power network or power module limitation.
We have extensively stressed the power module for it's 6A rating many many times, including over the full industrial temp range. Every unit also undergoes a "DUT Test" of 3A load during manufacturing testing.
The power module can certainly deliver a full 30W of Continuous power. 1A will barely make it sweat.The more likely culprits can be either the power cable, which often get stressed easily by pulling on the cables during extraction/removal instead of the cable shroud. This will over time shred the cable junction at the pin contacts. We have a standing rule at HQ to replace the main power cable every few months.
Or, it might be some GPU linked trigger due to a 100% load, especially if you are not seeing any CPU issues.If you wish to share a photo of your setup, we can help further.
Thanks! -
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.
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Great to hear you got it figured out!
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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! -
@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 -
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... -
Hi @voxltester
Please take a look at this old thread: https://forum.modalai.com/topic/1356/sentinel-drone-randomly-reboots?_=1673383475709Let 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 -
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?
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@voxltester
voxl-inspect-cpuwill show you GPU utilization and temperature -
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