Can Badgy measure the voltage of the battery? about badgy HOT 3 CLOSED

You can - jumper the ADC pads on the back and that will give you the voltage as an analogue readout using the built in ADC of the ESP8266 chip.

from badgy.

Moved to Wiki https://github.com/sqfmi/badgy/wiki/Can-Badgy-measure-the-voltage-of-the-battery%3F

from badgy.

Adding to this all the way in 2022(!) Bridging the ADC solder jumper will only measure up to 3.3V as the voltage divider is 220k/100k - to get a more accurate battery voltage you should bridge the ADC jumper with a 100k resistor, which will bring the recorded ADC value closer to 4.2V when at or near 1V seen on the ADC ( voltage divider will be = 320k / 100k).

from badgy.