Smart Home β FAQ
Do smart motion sensors work when the internet is down?
Zigbee and Z-Wave sensors continue functioning locally with hub-based automations. Wi-Fi sensors typically fail without internet, though some cache alerts. Matter over Thread sensors maintain local control if your Thread border router stays powered.
What's the difference between PIR and mmWave motion sensors?
PIR detects infrared heat signatures and requires movement across zones. mmWave radar uses radio waves to detect micro-movements and presence, even when you're still. mmWave eliminates false alarms and provides faster detection but costs more.
Can I install smart motion sensors myself?
Yes. Most sensors mount with adhesive strips or a single screw. Wi-Fi sensors use app-based setup. Zigbee sensors require hub pairing first. Budget 5-10 minutes per sensor for placement, pairing, and testing automations.
How many motion sensors do I need for a typical home?
Start with one per main entry point: front door, back door, garage. Add sensors for hallways that connect to bedrooms. A 2,000 sq ft home typically needs 4-6 sensors for comprehensive coverage. Corner mounting maximizes each sensor's effective range.
Will pets trigger motion sensors?
Standard PIR sensors trigger on pets over 25 lbs. Look for 'pet-immune' models that ignore animals under 40-80 lbs. mmWave sensors with AI filtering can distinguish human gait patterns from pets. Mount sensors high (7+ feet) and point away from pet furniture.
Do motion sensors record video or audio?
No. Motion sensors only detect movement and send triggers. Pair them with smart cameras that activate on sensor alerts for video verification. Some advanced sensors include light meters for ambient brightness data, but none capture audio or video.
