Node Vbat is broken

[jgallagher59701]

The data sent by the lora include Vbat, but the value is wrong. When the actual voltage is 2.7, the node reports it as 3.31. The voltage at the top of the V Divider is 1.905

[jgallagher59701]

1. The RS has a voltage div on pin A5 – use that instead of adding my own.
2. modifying the get_bat_v() function so it waits 100ms before reads and only returns a value when two consecutive reads are within delta counts seems to have fixed the problem with the bogus values when Vbat is > 3.3v However, ...
3. When Vbat is < 3.3 the value read from A5 (or my own voltage div on pin A0) is floored at 3..3 v.

Put this back in ToDo for now. Maybe something will turn up later.