I also thought I remembered seeing rt9013 regulators on Wemos mini schematics.
So the situation where im in now is not ok? Using a 100k resistor between the + and the A0.
Aren't the WeMos boards about as heavily cloned as Arduino Nanos ?
I don't think they ever used ams1117, unless that was the D1 or D1R2 (the Uno size boards).Maybe you were thinking of the nodeMcu boards?
Hello Paul, no i dont have a pot to test with.
I've purchased the Wemos at Ali indeed.
AMS1117, great advantage being that you can supply it with 12V. The RT9013 can't handle that voltage.
So i have to calculate +1.1 v at the vcc?
You are measuring the output of the 3.3V regulator on the Wemos, so you get answer of 3.3V. Use the A0 pin with a 180K resistor connected to the 5V pin. The Wemos has a voltage divider on the board which allows voltages up to around 3.3V to be measured. The 180K will extend this to around 4.7V.
Instead of connecting the 100k resistor directly to the battery it have to be connected on the 5v on the Wemos. For now i did some quick test and voila there where some 1024 results. So it seems the A0 is working properly.