GPIO internal pull-up and pull-down resistance value

sakurasaku
Posts: 2
Joined: Fri Mar 23, 2018 12:41 am

GPIO internal pull-up and pull-down resistance value

Postby sakurasaku » Fri Mar 23, 2018 1:00 am

What is the resistance value of the internal pull-up and pull-down of GPIO of ESP-WROOM-32?
please tell me.

ESP_Sprite
Posts: 8926
Joined: Thu Nov 26, 2015 4:08 am

Re: Internal resistance value

Postby ESP_Sprite » Fri Mar 23, 2018 1:23 am

It's not a really precise value (because that is hard to do with resistors in silicon) but you can assume it's something between 10K and 100K. Internally, we use 50K as a go-to value, I think.

sakurasaku
Posts: 2
Joined: Fri Mar 23, 2018 12:41 am

Re: Internal resistance value

Postby sakurasaku » Fri Mar 23, 2018 1:37 am

Thank you very much. It was very helpful.

aanscharius
Posts: 1
Joined: Tue Dec 13, 2022 3:15 pm

Re: GPIO internal pull-up and pull-down resistance value

Postby aanscharius » Tue Dec 13, 2022 3:21 pm

Hi,

10K is waaayyy to low, if you have several pullup's downs, the drain from 3.3 or GND to all input becomes to high and the board will reset.

I use 1M and that works perfectly fine, even higher could be ok, the board is very sensitive!

regards
Johan

ESP_Sprite
Posts: 8926
Joined: Thu Nov 26, 2015 4:08 am

Re: GPIO internal pull-up and pull-down resistance value

Postby ESP_Sprite » Thu Dec 15, 2022 1:23 am

aanscharius wrote:
Tue Dec 13, 2022 3:21 pm
10K is waaayyy to low, if you have several pullup's downs, the drain from 3.3 or GND to all input becomes to high and the board will reset.
...too low for what? Your comment doesn't really make sense in the context of this topic?

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