- Does it need a hub?
- Yes. It is a Zigbee device and needs a Zigbee coordinator such as a Sonoff bridge, Home Assistant with a Zigbee stick, or a compatible hub. It does not connect to Wi-Fi on its own.
- How is it different from a motion sensor?
- It uses mmWave radar to detect presence, including people who are sitting still. A PIR motion sensor only reacts to movement, so lights can switch off while someone is reading.
- Will it work with Alexa and Google Assistant?
- Yes, through a compatible Zigbee hub. The sensor itself reports presence, and your hub or platform exposes it to Alexa and Google Assistant for routines and automations.
- Can it see through walls?
- Radar can pass through thin walls and glass, which causes false triggers. Mount it away from shared walls and windows, and lower sensitivity if needed.
- What battery does it use?
- It runs on a CR2477 coin cell. Battery life depends on reporting frequency and sensitivity settings.
- Is it good for a bathroom or hallway?
- Yes. Short-stay rooms benefit from presence detection that keeps the light on while someone is still. Tune the hold time so the light does not stay on too long after you leave.
- Where is the Sonoff SNZB-06P Zigbee Human Presence Sensor cheapest?
- At Amazon, for $17.90, 25% under what the other stores charge, as of our latest check.
- Where can I buy the Sonoff SNZB-06P Zigbee Human Presence Sensor?
- 11 stores we checked sell it, including Amazon, Home Depot, Sonoff Official Store, banggood.com, RobotShop.com.