You can find the pin number of the reserved port through the pictures below.
2.4-inch ESP32 Display HMI
2.8-inch ESP32 Display HMI
3.5-inch ESP32 Display HMI
4.3-inch ESP32 Display HMI
5.0-inch ESP32 Display HMI
7.0-inch ESP32 Display HMI
ESP Terminal RGB
ESP Terminal SPI
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