ESP32 Forum

I am designing a system that will be using the following protocols: I2S, I2C, and SPI. I am having difficulty finding where to define the GPIO pins manually to route these signals, I have searched the SDK as best as I could. Could you provide some assistance with defining the necessary GPIOs so that communicate with the external devices in my circuit design?

For all these peripherals, you can basically pick any (otherwise unused, and watch the strapping pins) GPIO. These peripherals all can be routed through the GPIO matrix, so they can connect to any pin.