There is no need for external power supply because the light sensor switch is powered directly from the 220V mains. D1 … D5 diodes rectifies the voltage and C4 filters it. C5 is working as a resistor ...

Aqara’s Thread-based Motion and Light Sensor P2 ($33.99) has been on my smart home wish list since it was announced way back in 2022 — and now, it’s finally here. My home runs on motion ...

There's really not much to the motion sensor. The sensor shoots out an invisible light field that spans 100 degrees horizontally and 100 degrees vertically. Its blind spot is 180-degrees to its sides.