[Feature] Battery indicator

[markfodor]

It would be nice to display a battery indicator (maybe percentage) so we would know when we need to charge the board before it completely dies. It also helps troubleshooting.

A must have feature I would say

[markfodor]

Note to self after quick check:
display.readBattery();
It only returns the current voltage of the battery

Note to self after quick check: display.readBattery(); It only returns the current voltage of the battery

Maybe the read voltage value range could be translated to a more human readable form. I wouldn't know at what voltage it would be considered as low.

[markfodor]

@atani12 While is was working on issue #8 I realized what the problem was on your side.
I think the board kept trying to connect to your router over and over again and, of course, never succeeded. I assume doing this for hours drained your battery enough.😀

I will solve that issue first and then add this one, so we can save a little battery juice, and it will be clear what is going on.

Could be, but maybe I also depleted it more than anticipated previously when adding/updating code on it, likely all that combined actions made it very low.
Anyway, with those code updates and the inclusion of the battery level, this should be a problem of the past soon :)

[markfodor]

It looks like all the Inkplate boards use 3.7V batteries.
I know the thresholds now, so it is possible to display whether the battery is full, okay, or low. However, I need to find a way to represent this in a clear, language-independent manner.
I think a battery icon with three states could be a good solution.

In practical terms, for this kind of device you only need to tell the user when the battery is low, so this can be thought as a two state situation, low battery (warning) and not low (no warning).