To access the OV7670 camera module from the ESP32 board, we need to connect its pins onto the board. Figure 8.7 shows the Pin Mapping recommendation to connect the OV7670 camera module to the ESP32 board:
Figure 8.7: Mapping the OV7670 camera module to the ESP32 board
One of the advantages of using the ESP-WROVER-KIT board is that you don't need an additional camera connector; you can plug the OV7670 camera module into the board.
The disadvantage of using the ESP-WROVER-KIT board is that you cannot use the OV7670 camera module with a camera connector and the LCD simultaneously, because the camera connector and the LCD pins use the same wiring on the board. You should change these pins manually if you want it to work for both the OV7670 camera module and for the LCD on the ESP-WROVER-KIT board.