arduino-esp32
tutorial belegungsplan: https://raw.githubusercontent.com/Nicholas3388/LuaNode/master/images/ESP32_dimension.png
esp32-devkitc_v4 Belegungsplan: https://www.mischianti.org/2021/07/17/esp32-devkitc-v4-high-resolution-pinout-and-specs/
https://elektro.turanis.de/html/prj405/index.html
our choice of ESP32: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-devkitc.html
Display: https://randomnerdtutorials.com/esp32-ssd1306-oled-display-arduino-ide/