Sonoff Zigbee Door/Window Sensor – Opening sensor, Zigbee, white (SNZB-04PR1)
Sonoff SNZB-04PR1 is a Zigbee door/window sensor that operates on a battery and uses the Zigbee 3.0 smart home protocol for communication. With the help of a magnetic counterpart, it can signal changes in the status of doors or windows. Accordingly, it can control Zigbee devices or, via the Sonoff Zigbee Bridge, eWeLink WiFi devices as well.
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The SONOFF SNZB-04P is a Zigbee 3.0 door and window opening sensor designed to monitor the status of doors, windows, cabinets and other openable elements. It detects open or closed status based on the distance between the main unit and the magnet, and this status can be used for notifications and smart home automations.
The sensor features built-in tamper detection, so with a compatible gateway, removal of the mounted sensor can be detected as a separate event. It is powered by a CR2477 coin cell battery, and according to the manufacturer's laboratory measurements, expected battery life can exceed 5 years. When closed, the distance between the two units can be up to 20 mm.
About SONOFF
SONOFF manufactures smart home devices, relay modules, energy meters, wall switches, Zigbee sensors, control panels, gateways and various electrical installation accessories. Its product range includes devices using Wi-Fi, Zigbee, Matter and LAN communication.
SONOFF devices are primarily based on the eWeLink platform, but many products can also be integrated with Home Assistant, Zigbee2MQTT, ZHA, SmartThings, Alexa, Google Home and other smart home systems.
Key product features
- Door and window status detection: Detects open and closed status based on the magnet moving closer to or farther from the main unit, and this status can be used to trigger automations.
- Tamper detection: Removal of the sensor can be detected as a separate event and can trigger an alert or notification in a compatible system.
- Long battery life: According to the manufacturer's laboratory data, more than 5 years of operation can be achieved with a CR2477 coin cell battery. Actual battery life depends on usage and Zigbee connection quality.
- Local automations: With a compatible Zigbee gateway, local scenes can continue to operate without an internet connection.
Smart home protocols and platform compatibility
- Zigbee 3.0: Uses communication based on IEEE 802.15.4 and requires a compatible Zigbee coordinator or gateway.
- eWeLink: Can be used with ZBBridge, ZBBridge-P, ZBBridge-U, NSPanel Pro and iHost systems; available functions depend on the gateway used.
- Home Assistant: Can be integrated directly using ZHA or Zigbee2MQTT.
- SmartThings: Can be used with SmartThings Hub V3 and Aeotec Smart Home Hub V3; a SONOFF SmartThings driver is available for direct integration.
- Amazon Alexa: Can be used with compatible Echo devices featuring a built-in Zigbee hub, or through eWeLink integration.
- Google Home: Door and window status can be queried through eWeLink integration.
- Apple Home: Can be integrated using a compatible SONOFF Matter Bridge or eWeLink CUBE.
- IFTTT: Can be used through eWeLink integration.
Smart features
- Open/closed status: The current status of the door or window can be checked remotely.
- Status history: Changes in door and window status can be reviewed.
- Left-open monitoring: A door or window remaining open for a specified period can be used as a separate automation condition with a compatible gateway.
- Closed-state monitoring: Remaining closed for a specified period can also be used as an automation condition.
- Tamper alert: Removal of the sensor from its mounting surface can trigger an alert or automation.
- Push notifications: App notifications can be sent for opening, closing and, in supported systems, tamper events.
- Smart scenes: Opening, closing, remaining open or closed, and removal can be used as automation conditions.
- Battery status: Battery level can be checked remotely on compatible platforms.
- Device sharing: The sensor can be shared with other eWeLink accounts.
- OTA update: Firmware updates are supported with a compatible SONOFF gateway, ZHA or Zigbee2MQTT.
Technical specifications
- Model: SNZB-04P
- MCU: Silicon Labs EFR32MG22
- Wireless connection: Zigbee 3.0, IEEE 802.15.4
- Power supply: CR2477, 3 V
- Zigbee communication range: Up to 30 m indoors
- Maximum installation gap: 20 mm between the main unit and magnet
- Main unit dimensions: 50.5 × 32 × 21.9 mm
- Magnet dimensions: 27 × 12 × 12.4 mm
- Housing material: PC
- Colour: White
- Installation environment: Indoor
- Operating temperature: -10–60 °C
- Operating humidity: 5–95% RH, non-condensing
- Maximum operating altitude: Below 5000 m
- Certifications: CE, FCC, ISED, RoHS
- Standard: EN IEC 62368-1
Additional features
- Mounting: The main unit and magnet can be attached using 3M adhesive surfaces.
- Alignment marks: The markings on the two units should be aligned with each other during installation.
- Communication check: A short press of the device button can be used to check the Zigbee connection at the installation location.
- Installation height: The manufacturer specifies a maximum mounting height of 2 metres.
