Shelly BLU H&T ZB
Device identification
Device name: Shelly BLU H&T ZB
Device model: SBHT-203C
Device Bluetooth ID: 0x0011
Short description
Shelly BLU H&T ZB is a smart humidity and temperature sensor. It has Zigbee and Bluetooth connectivity ensuring a secure connection with an extended battery life.
Main features
Long battery life
Air temperature and humidity reporting
Splash and dust-resistant
Compact size
Use cases
Climate control: Adjust the heating, ventilation, and air conditioning system based on current temperature and humidity levels to maintain a comfortable indoor environment.
Prevent mold and mildew: Monitor humidity levels to prevent the growth of mold and mildew in spaces like basements and bathrooms. The Shelly BLU H&T can activate ventilation or dehumidification devices when needed.
Alerts and notifications: Receive alerts or notifications when the temperature or humidity reaches predefined thresholds and prevent issues like frozen pipes in cold weather or excessive moisture.
Optimizing greenhouse conditions: Optimize conditions for greenhouse plants by adjusting watering systems and ventilation based on humidity and temperature levels.
Security enhancement: Increase your home protection by detecting unusual temperature changes that might indicate fire or flood.
Appliance control: Adjust operation of dehumidifiers, humidifiers, and fans based on the current temperature and humidity conditions.
Connectivity
Bluetooth
Zigbee
User interface
Inputs
One push button
One press: Sends the currently measured ambient temperature in °C, relative humidity in %, and a button-pressed event.
Four quick presses or 10-second press: Initiates pairing with another Bluetooth device.
Five quick presses: Activates Zigbee pairing.
A 30-second press: Performs a factory reset (possible only shortly after inserting the battery).
Outputs
One single-color (red) LED
One flash: The Device sends the current ambient temperature, humidity, and button-pressed event.
One flash every 2 seconds for 1 minute: The Device enters Bluetooth pairing mode for 1 minute.
Two flashes every 2 seconds for 1 minute: The Device enters Zigbee pairing mode for 1 minute.
One long flash: The Device performs a factory reset.
Specifications
Quantity | Value |
|---|---|
Physical | |
Size (HxWxD): | 37x37x10 mm / 1.46x1.46x0.39 in |
Weight: | 13 g / 0.44 oz |
Mounting | On a flat surface |
Shell material: | Plastic |
Color: |
|
Environmental | |
Ambient temperature: | -20 °C to 60 °C / -5 °F to 140 °F |
Humidity: | 0% to 100% RH |
Electrical | |
Power supply: | 1x 3 V battery (included) |
Battery type: | CR2032 |
Battery life: | 3 years |
Sensors | |
Humidity sensor: | Yes |
Temperature sensor: | Yes |
Bluetooth | |
Protocol: | 5 (LE) |
RF band: | 2402 - 2480 MHz |
Max. RF power: | <8 dBm |
Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
Zigbee | |
Protocol: | 802.15.4 |
RF band: | 2405 to 2480 MHz |
Max. RF power: | < 8 dBm |
Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
Microcontroller unit | |
CPU: | EFR32MG27 |
Flash: | 768 kB |
Firmware capabilities | |
Schedules: | No |
Webhooks (URL actions): | No |
Scripting: | No |
MQTT: | No |
Encryption: | Yes |
Other | |
Supported Devices |
|
Components and APIs
Compliance
Shelly BLU H&T ZB multilingual EU declaration of conformity 2025-11-26.pdf
Shelly BLU H&T ZB UK PSTI ACT statement of compliance 2025-11-26.pdf
Shelly BLU H&T ZB UKCA declaration of conformity 2025-11-26.pdf