Feature request Make VBATT optionally available to GPS

[gluap]

Jan reported on Slack that some GPS boards have trouble running off 3.3V but fare way better when powered directly from battery voltage. He had a whole delivery consisting almost exclusively of GPS modules that were incompatible with 3.3V. While the affected boards seem to be clones, not original ublocks, it would make for a more universal board design if it were possible to power the GPS from either 3V3 or Vbatt. the choice could be made by soldering a wire bridge or setting a jumper.

[amandel]

If all the GPS modules have a own 3.3 regulator, it might be worth to use this as default. This also reduces the load on the 3.3V rail.

[opatut]

I would like some users to test this. I know @amandel that you have a soft wired debug setup, so it'd be great if you could check how your hardware behaves if you connect GPS to VBAT.

I could cut a trace and resolder also, but I've only got one device and would rather not trash it :D So can someone else go first? ;)

If that works fine then we should probably just change the PCB.

[boldt]

I will do the check with my breadboard setup as well.

[amandel]

Sorry, my test setup is powered by USB and does not have a battery at all.