In short, Brmdoor should work again.
Postmortem:
There was a faulty old power supply where capacitor exploded.
In the meantime, battery that was as backup drained over days to a level where it seemed unrecoverable.
After replacing power supply 1st time, it worked for a while, until it wasn't able to power the system. Instead of expected 12V input the levels fluctuated periodically around 4.4-6.8V so Raspberry behind stepdown was in constant bootloop.
This part was "funny" since Raspi started booting, you could repair/fsck boot system, but it never got anywhere.
We replaced the power supply again, disconnecting/bypassing the battery, it seems to be working now and for the love of god I hope the power supply won't fail anytime soon.
O.
On 9/11/21 5:05 PM, niekt0 wrote:
Hi,
the (brm)door is working again, the problem was a faulty power supply [1].
brm, n.