Recently an ad on YouTube about an acoustic light sensor/switch module piqued my interest. Out of curiosity, I contacted the online vendor and bought a pair. Named MR-SK50A, the module is less popular ...

Although there are smaller wireless-enabled microcontrollers, [Carl] based this project around the popular ESP32 platform ... As for sensors, it has a light sensor and an optional 9-axis motion ...

This breadboard compatible package combines an ESP32-S2 module with a top-mounted PIR sensor, making it a turn key solution for all sorts of motion sensing projects. In addition to the expected ...