Aqara makes the best smart sensors, hands down, and almost all of them, including hubs, are on deep discount right now. Amanda Blum is a freelancer who writes about smart home technology, gardening, ...
A smart home is more than a smart house.
When smart home devices were first introduced, motion sensors were among the most interesting. This sensor would use differences in light to detect activity in a given space—impressive, but imprecise.
IKEA's 21 new smart IoT devices support Matter, HomeKit, Google, and Alexa, so you can build a low-cost setup with quick pairing and simple controls.