requested feature battery management

[HB3YDM]

I’d like to see a battery indicator showing the percentage from 1% to 100%. Would it be possible to add a battery management system that charges the battery only from 20% to 80% if I choose?
It would also be great if I could set a time for the battery to be charged and receive an audible alert.

regarding

[recrof]

most of the boards we support don't have charging manageable by firmware itself

[IoTThinks]

charges the battery only from 20% to 80%

You can add a resistor to make sure the output from BMS is 3.9v only.
However, I think it is perfectly fine to charge to 4.1v.
The BMS will slow down the current rate when reaching 4.1v. So you don't damage your battery.

[HB3YDM]

Is it possible to establish communication with the MPPT controller or the battery management system in order to read its display? It will probably require a few more cables to connect everything up from a hardware perspective, but it’s certainly a useful tool for retrieving this real-time data and displaying it.

[HB3YDM]

I’m thinking more about the battery’s lifespan rather than whether it’s damaged; I’ve got the smartphone in mind because I’ve set it to charge from 20% to 80% to ensure the battery lasts longer.

[IoTThinks]

What does your BMS show on the screen?

To ensure it only charge up to 80-90%, you may need a resistor to make sure the output of BMS is 3.9v

If you keen to know about the charge rate, you may want to check INA219 sensor.

A bit tricky to do the wiring through.