I recently had to build an infrared close proximity sensor that could tell if something was dropped in a parcel delivery drop box. After some searching, I ended up using a microcontroller and a piece ...

You can use mmWave sensors to monitor presence rather than simply detecting motion.

Eve’s easy-to-install but pricey contact sensor offers powerful automations and works with Thread, but it doesn’t support Alexa or Google Assistant. Eve Systems has been adding more and more ...