Restrictions on GPIO pins

jshen0y
Posts: 7
Joined: Tue Nov 01, 2022 1:33 am

Restrictions on GPIO pins

Postby jshen0y » Fri Jan 13, 2023 2:05 am

Are there any special restrictions or notes on certain GPIO pins besides the strapping pins? I'm currently using ESP32-S3_DevKitC-1 and I want to connect a microphone (mono or stereo), speaker and a camera to it

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mbratch
Posts: 303
Joined: Fri Jun 11, 2021 1:51 pm

Re: Restrictions on GPIO pins

Postby mbratch » Fri Jan 13, 2023 2:13 am

Have you looked at Espressif's ESP32-S3-DevKitC-1 Documentation? It says, for example,
For boards with ESP32-S3-WROOM-2 modules, the pins GPIO35, GPIO36 and GPIO37 are used for the internal communication between ESP32-S3 and SPI flash/PSRAM memory, thus not available for external use.
If you're not using a lot of GPIOs, looks like you have quite a few to choose from if all you need is a microphone and camera.

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