Reading the battery level
Posted: Tue Mar 31, 2026 8:01 am
I use the Elecrow ESP32 with the 2.13" e-ink display
The schematic is located here:
https://www.elecrow.com/download/produc ... )_Inch.pdf
The unit is here:
https://www.elecrow.com/crowpanel-esp32 ... rface.html
The unit has a battery connector for a 3.3v Li-ion but I would like to know, if there's a way to get the battery level. The Elecrow-forum is dead and ChatGPT has provided me with primarily useless information, so I try my luck here
I'm unsure, if it already has a voltage divider and I would like to avoid, having to implement one on my own. If it does not, do you have alternative suggestions? I could perhaps create a counter, that increments on every bootup and asks the user to charge every XXXth day, but this would be very inaccurate.
The schematic is located here:
https://www.elecrow.com/download/produc ... )_Inch.pdf
The unit is here:
https://www.elecrow.com/crowpanel-esp32 ... rface.html
The unit has a battery connector for a 3.3v Li-ion but I would like to know, if there's a way to get the battery level. The Elecrow-forum is dead and ChatGPT has provided me with primarily useless information, so I try my luck here
I'm unsure, if it already has a voltage divider and I would like to avoid, having to implement one on my own. If it does not, do you have alternative suggestions? I could perhaps create a counter, that increments on every bootup and asks the user to charge every XXXth day, but this would be very inaccurate.