Set NRF cpu brownout at 2.4V instead of running down to the limit

[thebentern]

Closes #2936 hopefully.
@pdxlocations can you try to repro with the build assets from this change on a RAK?

[pdxlocations]

Closes #2936 hopefully. @pdxlocations can you try to repro with the build assets from this change on a RAK?

Sure thing, um where can I find the assets again?

[garthvh]

Closes #2936 hopefully. @pdxlocations can you try to repro with the build assets from this change on a RAK?

Sure thing, um where can I find the assets again?

https://github.com/meshtastic/firmware/actions/runs/7215104198

[thebentern]

Going to go ahead and integrate this since it's a safer voltage threshold to brownout on.

[pdxlocations]

Going to go ahead and integrate this since it's a safer voltage threshold to brownout on.

Makes sense.

I was able to start testing last night. I started with a factory reset and installed the 2.2.14 release to make sure I could re-create the issue. Funny thing is, I let the battery drain about 15 times and the board never reset to defaults. This was using the same board and battery that I had experienced the issue on at least once before. I never got to installing your build asset.

I'll try to recreate on the another board/batt I had originally experienced this with.

[ulrichard]

Is there a chance this will help with https://meshtastic.discourse.group/t/rak-4631-solar-repeater/7694/4 or is it completely unrelated?

[garthvh]

Is there a chance this will help with https://meshtastic.discourse.group/t/rak-4631-solar-repeater/7694/4 or is it completely unrelated?

completely unrelated, that discord post is not real accurate either.

[CyberRatingsTim]

testing on current 2.4 both at low battery (around 2.49v) go into a boot loop and lose settings.