supply an esp32 board with a cr2032

All ESP32 boards running MicroPython.
Target audience: MicroPython users with an ESP32 board.
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Jackli
Posts: 80
Joined: Thu Apr 29, 2021 9:11 am

supply an esp32 board with a cr2032

Post by Jackli » Fri Sep 24, 2021 9:08 am

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?

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davef
Posts: 811
Joined: Thu Apr 30, 2020 1:03 am
Location: Christchurch, NZ

Re: supply an esp32 board with a cr2032

Post by davef » Fri Sep 24, 2021 9:16 am

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?

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Roberthh
Posts: 3667
Joined: Sat May 09, 2015 4:13 pm
Location: Rhineland, Europe

Re: supply an esp32 board with a cr2032

Post by Roberthh » Fri Sep 24, 2021 9:33 am

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

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