They are treated differently in the HID++ 2.0 specification. Observations seem
to confirm this difference. For instance, a part of solaar-cli's output:
0: unknown:0022 => Home FN sensitive, is FN, reprogrammable
1: Mail => Mail FN sensitive, is FN, reprogrammable
2: unknown:003E => Search FN sensitive, is FN, reprogrammable
- `self[BATTERY_STATUS] = BATTERY_STATUS[battery_status]` should be:
`self[BATTERY_STATUS] = _hidpp20.BATTERY_STATUS[battery_status]`, otherwise
the battery status would be a single char from the string `battery-status`.
- Make `_hidpp20.BATTERY_OK` check against strings instead of a number.
- Move setting battery information to a separate function, `set_battery_info`.
This prepares for notifications when a battery error/warning occurs.