Verified compatibility
We test every device for these ecosystems. For non-standard integrations contact us before ordering.
- Home Assistant
- Zigbee
- Matter
- KNX
- Wi-Fi

Shelly BLU Door/Window ZB is a compact open-close sensor for a door or window, in a brown finish, that mounts on the sash and frame and reacts to every open-closed change. The magnetic reed contact registers separation, while the G-sensor tells apart the tilt of a turn-and-tilt window, so you also see the vent position.<br><br>The device also measures illuminance and can trigger scenes by light level. It communicates over Zigbee 3.0 alongside Bluetooth 5 LE with BTHome, powered by one CR2032 battery rated up to 5 years.<br><br>Important: as a Zigbee sensor it needs a gateway for the app and cloud - a Shelly BLU Gateway or any Shelly Plus, Pro, Gen3 or Gen4 (sensors excluded).
CasaSmart essentials
We test every device for these ecosystems. For non-standard integrations contact us before ordering.
What you need on your side and what we deliver.
Three typical automations we set up after the install.
When the sensor reports open, the thermostat lowers heating in winter or stops the air conditioner in summer.
The G-sensor tells apart the tilt, so a short airing does not trigger needless alerts.
The light sensor switches on background lighting as the room darkens in the evening.
Same ecosystem
Devices that run in the same smart-home ecosystem.

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Same category
Close models and alternatives from the CasaSmart catalog.

Sonoff
299MDL

Avatto
199MDL

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Manager guidance
A CasaSmart manager calls you within 1–2 working hours and answers anything — compatibility, install, alternatives.
+373 60 944 922