Camper control panel replaced with 10.1-inch touchscreen running on ESP32-P4

A modification has been published that replaces the original control panel for lighting and water pump in a camper with a 10.1-inch touchscreen. The solution targets vehicles equipped with the Italian CBE DS-300 distribution unit, which remains unmodified. The author, danderik88, uses it daily in a 2009 Elnagh Prince 55L camper. According to him, the original panel is merely a remote control: relays and fuses are in the distribution unit, and the panel connects via a 16-pin cable. Power for lighting and sockets is switched by grounding pin 14, the pump by pin 6; there is no communication protocol. CBE does not publish this pinout. The author traced it through the manual, owner forums, and wiring diagrams found on the Internet Archive, verifying with a tester. The new screen is a 10.1-inch board with ESP32-P4 running ESPHome. From the screen, the pump can be switched, and 15 lights can be controlled via Home Assistant.