MicroPython Forum (Archive)

Hi, guys,
I tried to supply an esp32 board with a cr2032, through the 3.3v pin, but also if the led on the board is ON, the board does not work.... do you know I made a mistake in the connection or it is not possible to supply the esp32 board trough a 3.3v battery?

If the WiFi fired-up or you even tried to turn an LED on the battery which is nominal 3.0V probably dips below the min voltage spec for the ESP32. Have you got a digital multimeter?

A Cr2032 battery cannot supply an ESP32 board. It cannot source sufficient current.