Hello. I'm in the process of submitting a product for an RF test that used ESP32-C3-MINI-1U for regulatory approval. I only use BLE communication without Wi-Fi.
There is a self-declare field that asks for the RF nominal power and RF burst power in "... dBm ± ... dB" format.
Per the datasheet, which ...

Thanks all for the information, really helpful.

I'm proceeding with GPIO.in method, and also REG_READ(GPIO_IN_REG) is giving more or less the same performance

Currently, I'm using GPIO.out method to get a fast digital write operation.

gpio_config_t io_output_control;

io_output_control.pin_bit_mask = (1 << PIN_OUT_0) | (1 << PIN_OUT_1) | (1 << PIN_OUT_2) | (1 << PIN_OUT_3);
io_output_control.mode = GPIO_MODE_OUTPUT;
gpio_config(&io_output_control ...

Alright, thanks for the confirmation.

The S3 docs mentioned that GPIO34-39 is input only pins. I know it's applicable to ESP32, but is it also true for S3? I just realize that I already have a custom board that used that pin as SPI port (GPIO35-38 = MISO, SCK, MOSI, CS) and it works just fine. I just need confirmation.
Thank you.