Restrictions on GPIO pins

[jshen0y]

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

[mbratch]

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.