Product Overview
Introduction
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Product Name |
SONOFF Zigbee Door/Window Sensor |
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Product Model |
SNZB-04P is a Zigbee 3.0 protocol-based door/window sensor equipped with a tamper-proof feature. It senses the open and close status of doors and windows by detecting the proximity of the transmitter and magnet. This sensor seamlessly interacts with other smart devices to easily create various scenarios, such as automatically turning on lights when a door is opened, triggering audible and visual alarms in case of unauthorized entry, and sending app notifications to keep you informed.
Highlights
- Smart Monitoring for Doors & Windows
The lights turn on instantly when a door opens. Unauthorized entry? Get both sound and light alarms plus instant app notifications—so you’re always in control.
- Tamper Alert for Extra Security
Built with tamper detection—if anyone tries to mess with the sensor, you’ll get an immediate alert on your phone. Smart protection, zero compromises.
- 5-Year Battery Life, Worry-Free
Powered by a high-capacity CR2477 battery, this sensor delivers over 5 years of reliable performance—no need for constant replacements.
- Local Smart Scene, Works Even Offline
Your Zigbee automations keep running smoothly even if the internet drops. As long as your devices are powered, scene linkage stays active locally.
Applications
- Intrusion Detection Alarm
When doors or windows are opened illegally, the Zigbee Door/Window Sensor triggers the security system (such as cameras) to sound an alarm and notify the user in real time.
- Display Case Monitoring
Detects whether display cases have been opened, helping to secure high-value merchandise.
- Medicine/Equipment Cabinet Monitoring
Detects unauthorized access to medicine or equipment cabinets and sends timely alerts.
- Mailbox Open/Close Detection
Installed on outdoor mailboxes to notify users when new mail is delivered.
- Pet Door Monitoring
Monitors whether pets are entering or exiting normally and links with cameras to observe their activity.
Specification
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Model |
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MCU |
EFR32MG22 |
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Input |
CR2477（3V） |
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Colour |
White |
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Product dimension |
Transmitter（50.5x32x21.9mm）Magnet（27x12x12.4mm） |
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Net weight |
33g |
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Casing materials |
PC |
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Wireless connection |
Zigbee 3.0 IEEE802.15.4 |
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Pairing time |
180s |
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Communication distance |
Indoor environment 30m |
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Applicable place |
Indoor |
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Installation distance |
≤20mm |
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Working temperature |
-10°C ~ 60°C |
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Working humidity |
5-95%RH, non-condensing |
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Working height |
Less than 5000m |
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Certification |
CE/FCC/ISED/RoHS |
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Executive standard |
EN IEC 62368-1 |
Key Features
eWeLink Platform
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Notice: This functionality is available only when the device is paired with the eWeLink app. For capabilities when the device is paired via Matter with Alexa, Google Home, or other platforms, refer to Key Features >> Compatible Zigbee Hubs List |
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Device Home Page Functions |
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Key Features |
Feature Description |
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Battery level |
The current battery level of the device. |
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Device Status |
Current device status. |
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History Record |
Records of device status changes. |
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Device Settings |
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Key Features |
Feature Description |
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Third-party Platforms |
Alexa |
Zigbee door sensor status query |
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Google Home |
Zigbee door sensor status query |
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SmartThings |
Zigbee door sensor status query |
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Alice |
Zigbee door sensor status query |
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IFTTT |
Zigbee door sensor status query |
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Assign location |
Set up the home and room where the device is located. |
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Share |
The device can be shared with other eweLink accounts. |
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Smart Scene |
Trigger Condition |
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Execution Action |
Unsupport being the smart scene execution device. |
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Push notifications |
After turning on "Push notifications", also make sure to grant notification permissions in Phone Settings > Permissions for the eWeLink app. This allows you to receive push notifications when the device status changes.
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Delete Device |
Remove the device from the eWeLink platform. |
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Compatible Zigbee Hubs List
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Platform |
eWeLink |
Home Assistant via ZHA |
Home Assistant via Z2M |
SmartThings |
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Zigbee Hub |
ZBBridge |
ZBBridge-P ZBBridge-U, NSPanel Pro, iHost |
ZBDongle-P/-E |
ZBDongle-P/-E |
Samsung SmartThings Hub V3 / Aeotec V3 |
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Device Status(close/open) |
√ |
√ |
√ |
√ |
√ |
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History Record |
√ |
√ |
√ |
√ |
√ |
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Sensor is forcibly removed |
× |
√ |
√ |
√ |
√ |
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Remain closed/opened for a duration |
× |
√ |
√ |
√ |
√ |
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Local Scene |
× |
√ |
√ |
√ |
√ |
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OTA |
× |
√ |
√ |
√ |
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Notice:
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Installation and Configuration Guide
① Transmitter
② Button
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Button |
Description |
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Press & hold 5 seconds |
Device enters the pairing mode. |
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Single press |
Effective communication distance verification. |
③ LED indicator (Red)
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LED indicator status |
Description |
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Flash slowly for 180 seconds |
First-time power on/press and hold button for 5s to enter pairing mode. |
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Keep on for 3s and then keep off |
Paired successfully. |
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Exit flashing slowly and keep off |
Distribution failure/timeout. |
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Flash once quickly |
Not added to the gateway, and short-press the button. |
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Flash twice quickly |
Added to the gateway and online, and short-press the button. |
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Flash slowly for 30 seconds |
Abnormal communication. |
④ Battery cover
⑤ Alignment mark for installation
⑥ Magnet
Power On the Device
Take out the battery insulation sheet to power on the device.
Add Device
eWeLink Platform
Download the eWeLink App & Add SONOFF Zigbee Gateway.
Open eWeLink to scan the QR code on the Quick Guide or the device itself to add the device.
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Compatible Third-party Platform
If you're using a third-party Zigbee gateway, please refer to the corresponding app for detailed instructions on how to add the device.
Installation
| ① Tear off the protective film of the 3M adhesive. |
② Try to align the mark line on the magnet with that on the transmitter during installation. |
③ Install them in the opening and closing area separately(such as windows). |
Cautions
Make sure the installation gap is less than 20mm when the door or the window is closed.
Effective Communication Distance Verification
Install the device in the desired place, then press the Pairing button on the device. The LED indicator flashes twice, which means the device and the device under the same Zigbee network (the router device or hub) are in the effective communication distance.
FAQ
1. How does the sensor detect the door or window status?
The sensor detects the relative distance between the main sensor and the magnet. When they are separated or brought close together, it changes the state between "open" and "closed".
2. What is the tamper-proof feature?
The SNZB-04P has a tamper alarm that triggers if someone tries to remove or tamper with the device, sending an alert to the app or triggering automation actions.
3. What battery does it use, and how long does it last?
It uses a CR2477 coin cell battery, and under normal use, the battery life is typically up to 5 years.
4. Can I receive mobile notifications when the door or window is opened?
Yes. If connected to a supported app and hub, the sensor can send push notifications whenever a door/window is opened or closed.
5. Is it suitable for outdoor use?
SNZB-04P is designed for indoor use only. Exposure to rain or direct sunlight may damage the device.
Troubleshooting
1. The sensor is not being discovered by the Zigbee hub.
Ensure the CR2477 battery is correctly installed and not depleted.
Press and hold the pairing button for 5 seconds until the LED indicator blinks to enter pairing mode.
Make sure the hub is in pairing mode.
Bring the sensor closer to the hub during pairing.
If it still fails, reset the sensor (press and hold the button for 10 seconds) and try again.
2. No response when opening/closing the door.
Ensure the sensor and magnet are aligned properly (less than 20mm apart when closed).
Check if the battery is low or depleted.
Refresh the device status from your app or reboot your Zigbee hub.
Make sure the device is still connected to the hub (it may need to be re-paired if it lost connection).
3. False tamper alerts are being triggered.
Ensure the tamper switch on the back of the sensor is making full contact with the mounting surface.
Use double-sided tape or screws to ensure the device is firmly mounted.
Avoid placing it on uneven or flexible surfaces.
4. The battery drains too quickly.
Check if the device is frequently losing Zigbee connection, which may cause high power usage.
Make sure your Zigbee network has adequate signal strength—consider adding a Zigbee router/repeater.
Avoid frequent re-pairing or unnecessary automation triggers
Know more
For a detailed guide and review of the SONOFF SNZB-04P, visit our free course at the SONOFF Academy.