Battery-powered contact sensor that reports open/close state, tilt-and-turn angle, and ambient lux, with up to five years on a single CR2032 cell. Sold in Bluetooth and Zigbee (ZB) variants for flexible integration.
Works on integrations
Setup guides
Roles it can fill
Local over Bluetooth/BTHome, optionally relayed by a Shelly BLU Gateway to the Shelly integration; the BLU Door/Window ZB variant pairs over Zigbee (ZHA or Zigbee2MQTT). Reports open/close, tilt angle, and illuminance; CR2032 battery lasts up to five years.