"Safe" GPIO pins for ESP32-S3?

difficult-garage8985
Posts: 1
Joined: Mon Aug 08, 2022 6:29 am

"Safe" GPIO pins for ESP32-S3?

Postby difficult-garage8985 » Mon Aug 08, 2022 6:39 am

With previous versions of the ESP32, there have always been some GPIO pins which may briefly emit a PWM signal at boot or a logic HIGH, causing some undesirable activity in whatever the pins are connected to. There are some guides from people who tested the pins for such behavior such as this one:

https://randomnerdtutorials.com/esp32-p ... nce-gpios/

The problem is that with the different pin amount and layout of the ESP32-S3, these guides are now outdated. Are there any newer references to this somewhere, or do I just need to order a devkit and test it myself? I did not find anything in the datasheet which clearly explains this.

Thanks.

ESP_LJH
Posts: 384
Joined: Tue May 18, 2021 9:21 am

Re: "Safe" GPIO pins for ESP32-S3?

Postby ESP_LJH » Tue Aug 16, 2022 3:18 am

Hello, have you verified those gpios? I do not see default PWM from those pins, the conclusion is so strange. We provide IO state in datasheet for your reference, generally, default value is showed as the table lists.

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