Smart Home β FAQ
Do I need a hub for smart motion sensors?
It depends on the protocol. Wi-Fi and Thread sensors connect directly. Zigbee sensors require a hub like Aqara, SmartThings, or Echo 4th Gen. Matter sensors work without hubs on most platforms but benefit from Thread border routers.
What's the difference between PIR and mmWave radar?
PIR detects heat movement and requires line-of-sight. mmWave radar senses micro-movements through walls and can detect stationary presence. Hybrid sensors use both for maximum accuracy and fewer false alarms.
How high should I mount motion sensors?
Mount 7-8 feet high for human detection while avoiding pets. Angle sensors to cover doorways and high-traffic areas. Avoid pointing at windows, HVAC vents, or heat sources that cause false triggers.
Can motion sensors work with multiple platforms simultaneously?
Matter-certified sensors like the meross work across HomeKit, Alexa, Google, and Home Assistant at once. Zigbee sensors are limited to one hub ecosystem. Wi-Fi sensors depend on manufacturer app support.
What's the realistic battery life for wireless sensors?
Zigbee PIR sensors last 5+ years. Wi-Fi sensors typically need new batteries every 9-12 months. mmWave radar sensors consume more power and often require wired power or annual battery changes.
Will my cat trigger pet-friendly motion sensors?
Properly mounted pet-friendly sensors ignore animals under 25-30 lbs. Mount sensors at least 4 feet high and point them downward. Test with your pet before finalizing automation rules.
