Customer:
I’ve just bought a NULA DeepSleep board for an autonomous sensor project, powered by a Li-Ion battery, and I’d like to know if there is a pin that can give the battery voltage on the board, through a divider of course.
Originally submitted via email support on 3 March 2026. Migrated to the forum for community visibility.
Soldered Support:
You can use the VBAT pin and connect it via a voltage divider to a pin of your choice to get the analog read value which will indicate battery %. The board was not designed with this pre-connected due to some current draw when the pin is connected to VBAT, as the board is optimised for low power.
Attachment omitted in migration: Soldered NULA ESP32-S3 Low-Power Schematic.pdf
Customer:
Could you send me the Kicad files for the deepsleep board?
Soldered Support:
The Kicad files are available: Soldered NULA DeepSleep ESP32-S3.zip