ESP32 pins used by WiFi

[bob_f]

Hello, I am using the ESP32-Wroom-32D for the first time, and I read online that some pins cannot (or should not) be used when the ESP32's WiFi functionality is used/enabled. However, I could not find exactly what pins are not recommended for use when WiFi is enabled for my specific board. Does anyone know what pins shouldn't be used with WiFi for the ESP32-Wroom-32D? Thanks in advance.

[groundFungus]

This may be helpful >> ESP32 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials

[Idahowalker]

Read the docs.

Hardware Limitations

• Random Number Generator uses ADC as a input source. When ADC adc_oneshot_read() works, the random number generated from RNG will be less random.

• A specific ADC unit can only work under one operating mode at any one time, either continuous mode or oneshot mode. adc_oneshot_read() has provided the protection.

• ADC2 is also used by the Wi-Fi. adc_oneshot_read() has provided the protection between Wi-Fi driver and ADC oneshot mode driver.

• ESP32 DevKitC: GPIO 0 cannot be used due to external auto program circuits.

• ESP-WROVER-KIT: GPIO 0, 2, 4 and 15 cannot be used due to external connections for different purposes.

https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/adc_oneshot.html

[bob_f]

Thank you all for the information, it helped me a lot!