Things used in this project × 1 I use ESP32s while traveling or at home. Different approaches to connecting the ESP32's WiFi are possible. At home I have a router that I can connect to. But this is not the case in nomadic use. I use then the possibility of configuring the ESP32 in "Access Point" mode. Every sketch I write, I have to reconfigure the section concerning the WiFi connection. This is not practical and is prone to errors. This little module uses conditional compilation in the Arduino IDE.