Argo Trekking 2020 w/ Pi Zero 2w Needs 2 usbs

[algoz098]

Hi, first of all, amazing piece of work/software you got here! Cheers!

Now, I have put this into a rasp pi zero 2w and connected to a Argo Trekking (Fiat) 2020.

And did not work first, After some debug, I noticed for some reason, it keep restarting the PI needing to restart the process.
Then I tried to put two usbs, one for power, and another one for data, and after that work.

My question is, is this expected?
If so, is there a way to just use one USB from the car?

IF not, is this something anyone has experiencied? Is something I can do to prevent this problem?

[nisargjhaveri]

This could happen if the it was not able get enough power from the OTG port. But generally that should not be the case for RPi Zero 2w. I've been using it with just the OTG cable connected.

Logs from the device can help confirm, but might be difficult to get the logs, you might have to make some modifications and build.

[algoz098]

The problem with getting said information it seems the device keeps restarting. Maybe the car is restarting it?

[Gdenge]

Does the Pi give you any error blinking, or does it literally turn completely off and on again?

[algoz098]

Is hard to say anything more, but I can see the led of the PI turn off, and then on again, and for a couple seconds bluethooth and wifi disapear.

Theres no ERROR for theres no screen in the pi, nor does it keep the logs.

But, if I put two cables, one for power another for data, any strange behaiviour, stops.