I cannot find any clear documentation on how the BQ24195L chiup is configured.
As I understand, the bootloader configures the chip when powered on.
Is there any bootloader source code or documentation somewhere?
What is the constant current setup for MKRNB and MKRGSM board?
I saw in the doc that MKRNB has a preset charging current of 350mAh, which I'm not even sure of.
I don't have way to measure currently, but it seems that charging current of the NB is much higher than GSM one (using same LiPo, NB charges much faster, and also power supply warms up a lot more).
In addition, charging time is limited to 4 hours per cycle, on both board. I use a larger LiPo, and I have to force several cycles to get it full.
Project implies having the board at an unattended location, and have the LiPo for current bursts buffer, but also as backup in case external power supply fails.
If the LiPo is never charged to its full capacity, backup time is reduced, which is annoying.
Is there a way to change this charging time limitation?
Note: external power supply is on the USB port.