The ESP32 microcontroller has multiple General Purpose Input/Output (GPIO) pins, which can be used for various purposes including controlling pixels.

Pixels typically use a communication protocol called the Neopixel or WS2812 protocol, which requires a single data line to control the color and brightness of the pixels.

On the ESP32, the GPIO pins used for controlling Neopixels are often referred to as “pixel pins.” The specific pixel pins used can vary depending on the exact hardware setup and the library being used to control the pixels.

However, some common pixel pins used with ESP32 boards are GPIO 12, GPIO 13, GPIO 14, and GPIO 15. These pins are often referred to as D12, D13, D14, and D15 respectively in some ESP32 boards and programming environments.

It is important to consult the documentation for the specific ESP32 board and library being used to determine the appropriate pixel pins for controlling Neopixels.