ESP32 Forum

Posted: **Sun May 02, 2021 3:31 pm**

Hello all,

I want to use I2S to read samples from a microphone and looked at the sample code (in the ESP-IDF Programming Guide) to configure the reading:

Code: Select all

static const i2s_pin_config_t pin_config = { .bck_io_num = 26,
.ws_io_num = 25,
.data_out_num = 22,
    .data_in_num = I2S_PIN_NO_CHANGE
};

the ESP32 S2 Saola has no pins 22,23,24,25 - how is this supposed to be configured? which pins can I use for I2S?

Thanks for reading,
Markus

Posted: **Mon May 03, 2021 2:12 am**

Hello Markus,

The example is indeed incorrect (likely it has been carried over from ESP32 and not revised afterwards). Sorry for confusion!

You can configure any other pins you have available on your board following some restrictions mentioned in https://docs.espressif.com/projects/esp ... /gpio.html

ESP32 Forum

Where is GPIO pin 25 on the ESP32 S2 Saola?

Where is GPIO pin 25 on the ESP32 S2 Saola?

Re: Where is GPIO pin 25 on the ESP32 S2 Saola?