[34S] battery warning indicator / question

[Marcus von Cube]

(03-11-2015 05:51 AM)BarryMead Wrote:  Could someone who is more familiar with the firmware weigh in on this one?

Let me try. I do sample the current voltage before I let the software increase the processor speed but the sampling algorithm is a bit tricky: There is no A/D converter which can be easily read out. Sampling can only be done in larger intervals because the circuit is a quite primitive brown out detector. The second cause of grief is the behavior of the coin cells when they become weak. After some time without load they recover quite well but as soon as the load increases the internal resistance causes a severe voltage drop which may become too much for the processor to work reliably. The voltage detection algorithm is just too slow to cope with these conditions.

My advice: If you see the first "Reset" or "Restored" message switch to SLOW mode or change the cells.