Aqara Door & Window Sensor
Aqara Door & Window Sensor
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Aqara Door & Window Sensor
Open/closed state for any door, window, drawer or letterbox. Two-year battery, 11 mm tall, sticks anywhere. The first sensor most people automate with.
/ specifications
| detection | reed + magnet, 22 mm max gap |
| battery | CR1632, ~2 years |
| size | 41 × 22 × 11 mm |
| works when internet is down | YES |
| protocol | Zigbee 3.0 |
| home assistant | ZHA / Zigbee2MQTT |
/ entities in home assistant
Exactly what appears in your HA instance when this device pairs — no surprises.
| binary_sensor.*_contact | Open / closed state |
| sensor.*_battery | Battery % |
| sensor.*_device_temperature | Internal temperature |
when the internet dies
Open/close events keep flowing to your hub and every automation built on them keeps running.
This device lives in the Local Starter Kit — usually the cheaper way to get it.
/ common questions
Does it need a hub? Yes — Zigbee/local devices pair to your coordinator and Home Assistant. No vendor app, no cloud account.
Battery life real-world? The spec table is our honest estimate; heavy-traffic placements run shorter. Batteries are standard coin cells.
Returns? 30 days change-of-mind (unopened) plus full Australian Consumer Law cover on faults.
In real homes
/ home assistant entities
Exactly what appears in Home Assistant after pairing — * is the name you give the device.
| entity | what it does |
binary_sensor.*_contact | Open / closed state |
sensor.*_battery | Battery % |
sensor.*_device_temperature | Internal temperature |