In essence, you connect a common 433 MHz receiver module to an ESP32 or ESP8266 ... these type of sensors, as well as projects that pulled them all together into a complete home automation system ...

Designed by Everything Smart Home, the Everything Presence Lite is a compact, ESP32-based mmWave presence sensor designed to ...

the ESP is joined by a multicolor LED and one of those Stemma/Quiik connectors for expansion. The case is handily provided by Framework themselves, and all the files for the ESP32 module can be ...