Features
- High-accuracy temperature and humidity monitoring.
- Zigbee 3.0 wireless communication protocol.
- Real-time environmental data updates with refresh intervals as fast as 5 seconds.
- Ultra-low power consumption with battery life exceeding 4 years.
- Supports cloud-based historical data recording and analysis.
- Mobile application notifications for abnormal environmental conditions.
- Supports smart automation scenes and device control.
- Compatible with Zigbee smart home gateways.
- Supports voice assistant integration through Alexa and Google Home (via compatible gateway).
- Compact design suitable for indoor installation.
- Easy installation using adhesive mounting or placement.
Principle of Operation
The SONOFF SNZB-02P uses integrated temperature and humidity sensing elements to continuously measure environmental conditions. The onboard low-power controller processes the sensor data and transmits the measured values wirelessly through the Zigbee 3.0 communication protocol.
The Zigbee gateway receives the sensor data and transfers it to the smart home application or cloud platform. Users can view current readings, analyze historical trends, and configure automation rules based on temperature and humidity changes.
When the measured values exceed user-defined limits, the system can automatically trigger notifications or control connected devices such as ventilation systems, humidifiers, heaters, or air conditioners, helping maintain a comfortable environment while improving energy efficiency.
Applications
- Smart home temperature and humidity monitoring.
- Indoor climate control systems.
- HVAC automation.
- Greenhouse and plant environment monitoring.
- Office and workspace environmental tracking.
- Server room environmental monitoring.
- Energy-efficient climate management systems.
- IoT environmental sensing networks.
- Smart building automation.
Pinout
The SONOFF SNZB-02P is a wireless battery-powered sensor and does not provide external signal pins. All communication is performed through the Zigbee 3.0 wireless interface.
Wiring
No external wiring is required. The SNZB-02P operates as a standalone wireless sensor powered by a CR2477 battery.
| Connection | Description |
|---|---|
| Battery | Internal CR2477 battery provides power |
| Zigbee Hub | Wireless connection for data transmission and control |
Library Required
The SONOFF SNZB-02P does not require any programming libraries because it operates as a Zigbee smart home device. Configuration and data monitoring are performed through a compatible Zigbee gateway and smart home application.
For custom IoT integrations, the following platforms may be used:
- Zigbee2MQTT for advanced Zigbee device integration.
- Home Assistant for local smart home automation.
- eWeLink Application for SONOFF ecosystem integration.
Pairing SONOFF SNZB-02P with Home Assistant Using SONOFF Zigbee Dongle
Pairing the SONOFF SNZB-02P Zigbee Temperature & Humidity Sensor with Home Assistant is a simple process when using a SONOFF Zigbee USB Dongle as the Zigbee coordinator.
Setup Steps
First, connect the SONOFF Zigbee USB Dongle to the Raspberry Pi or computer running Home Assistant. Make sure Zigbee support is configured using either ZHA (Zigbee Home Automation) or Zigbee2MQTT.
Open Home Assistant and go to:
Settings → Devices & Services → Add Integration → Zigbee Home Automation (ZHA)
Select the connected SONOFF Zigbee dongle as the coordinator and complete the setup.
Next, put the SONOFF SNZB-02P sensor into pairing mode:
- Insert the battery into the sensor.
- Press and hold the pairing/reset button on the sensor.
- Release the button when the LED indicator starts flashing.
In Home Assistant:
Settings → Devices & Services → ZHA → Add Device
Home Assistant will automatically search for nearby Zigbee devices. Once detected, select the SONOFF SNZB-02P and complete the pairing process.
After Successful Pairing
The sensor will appear as a new device in Home Assistant and provide the following entities:
- Temperature measurement
- Humidity measurement
- Battery level
These values can then be used to create automations, dashboards, and alerts inside Home Assistant
Specifications
| Product Type | Zigbee Temperature and Humidity Sensor |
| Model | SONOFF SNZB-02P |
| Wireless Protocol | Zigbee 3.0 |
| Measurement Type | Temperature and Humidity |
| Battery Type | CR2477 |
| Battery Life | More than 4 Years |
| Refresh Rate | Up to 5 Seconds |
| Working Temperature | -10°C to 60°C |
| Communication Range | Depends on Zigbee Network Environment |
| Compatibility | Zigbee Smart Home Hubs and Gateways |
| Voice Assistant Support | Alexa and Google Home via Compatible Gateway |
| Product Dimensions | 45 × 45 × 17.7 mm |
Resources
- SONOFF Official Website:
https://sonoff.tech/ - SONOFF eWeLink Smart Home Platform:
https://ewelink.cc/ - Zigbee2MQTT Documentation:
https://www.zigbee2mqtt.io/ - Home Assistant Documentation:
https://www.home-assistant.io/ - Home Assistant ZHA Documentation
- Zigbee2MQTT Documentation
Features
- High-accuracy temperature and humidity monitoring.
- Zigbee 3.0 wireless communication protocol.
- Real-time environmental data updates with refresh intervals as fast as 5 seconds.
- Ultra-low power consumption with battery life exceeding 4 years.
- Supports cloud-based historical data recording and analysis.
- Mobile application notifications for abnormal environmental conditions.
- Supports smart automation scenes and device control.
- Compatible with Zigbee smart home gateways.
- Supports voice assistant integration through Alexa and Google Home (via compatible gateway).
- Compact design suitable for indoor installation.
- Easy installation using adhesive mounting or placement.
Principle of Operation
The SONOFF SNZB-02P uses integrated temperature and humidity sensing elements to continuously measure environmental conditions. The onboard low-power controller processes the sensor data and transmits the measured values wirelessly through the Zigbee 3.0 communication protocol.
The Zigbee gateway receives the sensor data and transfers it to the smart home application or cloud platform. Users can view current readings, analyze historical trends, and configure automation rules based on temperature and humidity changes.
When the measured values exceed user-defined limits, the system can automatically trigger notifications or control connected devices such as ventilation systems, humidifiers, heaters, or air conditioners, helping maintain a comfortable environment while improving energy efficiency.
Applications
- Smart home temperature and humidity monitoring.
- Indoor climate control systems.
- HVAC automation.
- Greenhouse and plant environment monitoring.
- Office and workspace environmental tracking.
- Server room environmental monitoring.
- Energy-efficient climate management systems.
- IoT environmental sensing networks.
- Smart building automation.
Pinout
The SONOFF SNZB-02P is a wireless battery-powered sensor and does not provide external signal pins. All communication is performed through the Zigbee 3.0 wireless interface.
Wiring
No external wiring is required. The SNZB-02P operates as a standalone wireless sensor powered by a CR2477 battery.
| Connection | Description |
|---|---|
| Battery | Internal CR2477 battery provides power |
| Zigbee Hub | Wireless connection for data transmission and control |
Library Required
The SONOFF SNZB-02P does not require any programming libraries because it operates as a Zigbee smart home device. Configuration and data monitoring are performed through a compatible Zigbee gateway and smart home application.
For custom IoT integrations, the following platforms may be used:
- Zigbee2MQTT for advanced Zigbee device integration.
- Home Assistant for local smart home automation.
- eWeLink Application for SONOFF ecosystem integration.
Pairing SONOFF SNZB-02P with Home Assistant Using SONOFF Zigbee Dongle
Pairing the SONOFF SNZB-02P Zigbee Temperature & Humidity Sensor with Home Assistant is a simple process when using a SONOFF Zigbee USB Dongle as the Zigbee coordinator.
Setup Steps
First, connect the SONOFF Zigbee USB Dongle to the Raspberry Pi or computer running Home Assistant. Make sure Zigbee support is configured using either ZHA (Zigbee Home Automation) or Zigbee2MQTT.
Open Home Assistant and go to:
Settings → Devices & Services → Add Integration → Zigbee Home Automation (ZHA)
Select the connected SONOFF Zigbee dongle as the coordinator and complete the setup.
Next, put the SONOFF SNZB-02P sensor into pairing mode:
- Insert the battery into the sensor.
- Press and hold the pairing/reset button on the sensor.
- Release the button when the LED indicator starts flashing.
In Home Assistant:
Settings → Devices & Services → ZHA → Add Device
Home Assistant will automatically search for nearby Zigbee devices. Once detected, select the SONOFF SNZB-02P and complete the pairing process.
After Successful Pairing
The sensor will appear as a new device in Home Assistant and provide the following entities:
- Temperature measurement
- Humidity measurement
- Battery level
These values can then be used to create automations, dashboards, and alerts inside Home Assistant
Specifications
| Product Type | Zigbee Temperature and Humidity Sensor |
| Model | SONOFF SNZB-02P |
| Wireless Protocol | Zigbee 3.0 |
| Measurement Type | Temperature and Humidity |
| Battery Type | CR2477 |
| Battery Life | More than 4 Years |
| Refresh Rate | Up to 5 Seconds |
| Working Temperature | -10°C to 60°C |
| Communication Range | Depends on Zigbee Network Environment |
| Compatibility | Zigbee Smart Home Hubs and Gateways |
| Voice Assistant Support | Alexa and Google Home via Compatible Gateway |
| Product Dimensions | 45 × 45 × 17.7 mm |
Resources
- SONOFF Official Website:
https://sonoff.tech/ - SONOFF eWeLink Smart Home Platform:
https://ewelink.cc/ - Zigbee2MQTT Documentation:
https://www.zigbee2mqtt.io/ - Home Assistant Documentation:
https://www.home-assistant.io/ - Home Assistant ZHA Documentation
- Zigbee2MQTT Documentation