Factory reset GPIO pin has to have external pullup?

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zliudr
Posts: 360
Joined: Thu Oct 03, 2019 5:15 am

Factory reset GPIO pin has to have external pullup?

Postby zliudr » Sat Apr 18, 2020 10:39 pm

Just a very simple question: is an external pullup resistor required for a factory reset GPIO pin to work or not? I'm considering GPIO 21. Thanks.
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zliudr
Posts: 360
Joined: Thu Oct 03, 2019 5:15 am

Re: Factory reset GPIO pin has to have external pullup?

Postby zliudr » Sat Apr 18, 2020 11:08 pm

Found my answer here. Except for 34-39 that don't have internal pullups, other pins will have internal pullups enabled.

https://docs.espressif.com/projects/esp ... tory-reset
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