Third Reality's Zigbee Door Sensor is a two-piece contact sensor for doors and windows that reports open and closed to Home Assistant the moment the magnet separates.
Entities in Home Assistant
5 entities via zigbee2mqtt
Primary entities 2 What automations and dashboards use.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Contact | binary_sensor | door | — |
| Delay open | number | — | s |
Diagnostics 3 Health and troubleshooting values, hidden from dashboards by default.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Battery low | binary_sensor | battery | — |
| Battery | sensor | battery | % |
| Voltage | sensor | voltage | mV |
From the zigbee2mqtt device database (zigbee-herdsman-converters
26.116.0):
the entities zigbee2mqtt creates for
3RDS17BZ.
Paired through ZHA instead, the same hardware produces a different set.
Where to buy
Recipes using this device
Door or Window Left Open Alert
Installs a Home Assistant automation that watches your door and window sensors and pushes a notification to your phone when one is left open past a grace period while nobody is home. Add lights and it flashes the room, add a speaker and it announces the warning out loud.
Window Open HVAC Pause
Installs a Home Assistant automation that turns the thermostat off when a window is left open, so you are not heating or cooling the street, and turns it back to the mode it was in once every window is shut. Add door sensors and a temperature sensor for the full picture.
Recipes that can use it
These recipes are built around other hardware, and pick this device up as an optional extra.