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- SONOFF SNZB-02P Zigbee Temperature Humidity Sensor (ZigBee Hub Required)
- Temp + Humidity
Features:
- High-accuracy temperature and humidity monitoring
- Real-time data updates with refresh intervals as fast as 5 seconds
- Long battery life exceeding 4 years for low-maintenance operation
- Cloud-based historical data logging and analysis
- Mobile app notifications for out-of-range temperature or humidity levels
- Smart scene automation for controlling devices like fans and humidifiers
- Zigbee 3.0 wireless protocol for stable and low-power connectivity
- Compatible with multiple Zigbee gateways and smart home systems
- Voice assistant support via Alexa and Google Home
Principle of Work:
The SNZB-02P sensor operates by continuously measuring ambient temperature and humidity using internal sensing elements. These readings are processed by an onboard low-power controller and transmitted wirelessly via the Zigbee 3.0 protocol to a paired gateway or hub. The gateway then forwards the data to a mobile application or cloud service, where it is displayed in real time and stored for historical tracking.
When environmental values exceed predefined thresholds, the system triggers alerts or automation routines. This allows integration with smart home devices such as humidifiers, air conditioners, or fans to maintain optimal environmental conditions automatically.
Pinout:

As a wireless battery-powered sensor module, the SNZB-02P does not include external signal pinouts. It operates independently and communicates exclusively via Zigbee 3.0 wireless protocol.
Applications:
- Smart home temperature and humidity monitoring
- Indoor climate control and comfort management
- Automation of HVAC systems
- Greenhouse and plant environment monitoring
- Office and room environmental tracking
- Energy-efficient climate optimization systems
Technical Details:
- Wireless Protocol: Zigbee 3.0
- Battery Model: CR2477
- Working Temperature: -10°C to 60°C
- Product Dimensions: 45 × 45 × 17.7 mm
- Measurement Type: Temperature and Humidity
Comparisons:
Compared to basic standalone temperature and humidity sensors, this Zigbee-based module offers wireless connectivity, cloud storage, and smart automation features. Unlike traditional wired sensors, it requires no direct connection to a microcontroller and can operate independently within a smart home ecosystem. It also provides significantly longer battery life and integration with mobile apps and voice assistants, making it more suitable for modern IoT applications.
Features:
- High-accuracy temperature and humidity monitoring
- Real-time data updates with refresh intervals as fast as 5 seconds
- Long battery life exceeding 4 years for low-maintenance operation
- Cloud-based historical data logging and analysis
- Mobile app notifications for out-of-range temperature or humidity levels
- Smart scene automation for controlling devices like fans and humidifiers
- Zigbee 3.0 wireless protocol for stable and low-power connectivity
- Compatible with multiple Zigbee gateways and smart home systems
- Voice assistant support via Alexa and Google Home
Principle of Work:
The SNZB-02P sensor operates by continuously measuring ambient temperature and humidity using internal sensing elements. These readings are processed by an onboard low-power controller and transmitted wirelessly via the Zigbee 3.0 protocol to a paired gateway or hub. The gateway then forwards the data to a mobile application or cloud service, where it is displayed in real time and stored for historical tracking.
When environmental values exceed predefined thresholds, the system triggers alerts or automation routines. This allows integration with smart home devices such as humidifiers, air conditioners, or fans to maintain optimal environmental conditions automatically.
Pinout:

As a wireless battery-powered sensor module, the SNZB-02P does not include external signal pinouts. It operates independently and communicates exclusively via Zigbee 3.0 wireless protocol.
Applications:
- Smart home temperature and humidity monitoring
- Indoor climate control and comfort management
- Automation of HVAC systems
- Greenhouse and plant environment monitoring
- Office and room environmental tracking
- Energy-efficient climate optimization systems
Technical Details:
- Wireless Protocol: Zigbee 3.0
- Battery Model: CR2477
- Working Temperature: -10°C to 60°C
- Product Dimensions: 45 × 45 × 17.7 mm
- Measurement Type: Temperature and Humidity
Comparisons:
Compared to basic standalone temperature and humidity sensors, this Zigbee-based module offers wireless connectivity, cloud storage, and smart automation features. Unlike traditional wired sensors, it requires no direct connection to a microcontroller and can operate independently within a smart home ecosystem. It also provides significantly longer battery life and integration with mobile apps and voice assistants, making it more suitable for modern IoT applications.