GPIO output low internal resistor

Reiner1210
Posts: 22
Joined: Tue Mar 20, 2018 6:28 pm

GPIO output low internal resistor

Postby Reiner1210 » Fri Oct 18, 2019 10:04 pm

Hello,

when I set a GPIO as output and it is set low. Is this a real GND or tristate.
So the question is can flow a current over this pin ? And if yes how much is the internal resistor ?

By the way: Is it possible to set pullup resistors on outputs or is this ignored ?

Reiner

mikemoy
Posts: 391
Joined: Fri Jan 12, 2018 9:10 pm

Re: GPIO output low internal resistor

Postby mikemoy » Mon Oct 21, 2019 11:28 am

Not all GPIOs on an ESP32 have pullup and pulldown resistors.
Take a look at the data sheet. All your questions are answered there.

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