The D1 mini Pro already has a buildin 100k:220k divider on the A0 pin.
If you use 100k between batt(+) and A0, then you should measure about 3volt on A0 when the LiPo battery is 4volt.
Make sure the resistor is 100k.
Leo..
The D1 mini Pro already has a buildin 100k:220k divider on the A0 pin.
If you use 100k between batt(+) and A0, then you should measure about 3volt on A0 when the LiPo battery is 4volt.
Make sure the resistor is 100k.
Leo..