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GPIO internal pull-up and pull-down resistance value
Posted: Fri Mar 23, 2018 1:00 am
by sakurasaku
What is the resistance value of the internal pull-up and pull-down of GPIO of ESP-WROOM-32?
please tell me.
Re: Internal resistance value
Posted: Fri Mar 23, 2018 1:23 am
by ESP_Sprite
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.
Re: Internal resistance value
Posted: Fri Mar 23, 2018 1:37 am
by sakurasaku
Thank you very much. It was very helpful.
Re: GPIO internal pull-up and pull-down resistance value
Posted: Tue Dec 13, 2022 3:21 pm
by aanscharius
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
Re: GPIO internal pull-up and pull-down resistance value
Posted: Thu Dec 15, 2022 1:23 am
by ESP_Sprite
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?