Shelly H&T Gen3 | Wi-Fi temperature and humidity sensor with e-paper display

The Shelly H&T Gen3 is a smart Wi-Fi temperature and humidity sensor (RH = relative humidity) with a clear e-paper display that shows values ​​and a clock (NTP, network time protocol) in an energy-efficient way. Thanks to Wi-Fi 2.4 GHz and Bluetooth (BLE, Bluetooth Low Energy, for onboarding), it's quick to set up and you can read data locally in the Shelly app, Home Assistant, or via MQTT. Choose 4x AA batteries or permanent USB-C power for faster updates and a continuously active display.

Specifications

Core identity: Shelly H&T Gen3; e-paper display; indoor climate sensor for temperature and relative humidity.

Connectivity and protocols: Wi-Fi 2.4 GHz (802.11 b/g/n), Bluetooth 4.x for onboarding; MQTT publishing; HTTP/CoAP for local integrations; webhooks/URL actions.

Platform compatibility: Shelly Cloud/App; Local Home Assistant via Shelly integration; Google Assistant; Amazon Alexa; Samsung SmartThings; Open integration via MQTT.

Power and energy: 4x AA (LR6) 1.5V or USB-C (adapter not included); battery life depends on update interval, temperature fluctuations and Wi-Fi strength.

Functional features (sensor): Temperature and humidity (% RH) with threshold reporting; adjustable interval measurements; e-paper for easy-to-read display; clock via NTP.

Automation: Scenes and schedules via the Shelly app; triggers via webhooks; in Home Assistant, automations based on threshold values ​​(e.g., ventilation at >60% RH) and combinations with other sensors/actuators.

Local controls: Physical reset button; local web UI during wake window; fully local use possible without cloud.

Software and Updates: Configuration via app/web UI; firmware updates via OTA; configurable MQTT topics; no built-in scripting.

Physical and installation: Freestanding installation with stand; compact and lightweight; wiring-free mounting when battery operated.

Environmental and Durability: Indoor use; typical operating temperatures (room range); Wi-Fi range varies by walls/interference.

Performance and latency: Battery mode with sleep and periodic transmission; USB-C with faster reporting and display refresh.

Safety and Certification: Consumer Electronics Factory Certifications; RF Power Compliant.

What's in the box: Shelly H&T Gen3 sensor; stand/base. Batteries, USB-C cable, and adapter not always included (check your bundle).

Warranty and service: Legal warranty through seller; support via Shelly app and knowledge base.

Documentation and resources: In-app manual, local web interface and community integrations (including Home Assistant, MQTT).

Marketing and use cases

Improve comfort and health in your bedroom, living room, or nursery with automatic ventilation or humidifier control based on relative humidity. Monitor server cabinets or pantries and activate a dehumidifier immediately when humidity exceeds the setpoint. Combine with Shelly relays or smart plugs for complete climate control.

Pros and cons

+ E-paper display: sharp, economical and always readable
+ Local with Home Assistant via Shelly integration; MQTT also possible
+ Choice of battery or USB-C for higher update frequency
+ Webhooks/URL actions for flexible automation
- No Matter support
- 2.4 GHz Wi-Fi only (no 5 GHz)
- Reporting frequency lower on batteries (energy saving mode)
- Batteries/USB adapter not included as standard in every bundle

FAQ

Does the Shelly H&T Gen3 work with Home Assistant?

Yes, locally via the Shelly integration on the same network; sensors for temperature, % RH and battery status are automatically discovered.

Does this model support Matter?

No, Matter is not supported; connect via Shelly integration or MQTT.

How do I pair the sensor?

Power the sensor (batteries or USB-C), complete Bluetooth onboarding in the Shelly app, and connect to 2.4GHz Wi-Fi; then add it in Home Assistant or set up MQTT.

What network protocols does the H&T Gen3 use?

Wi-Fi 2.4 GHz for data, Bluetooth (BLE) for onboarding; plus MQTT publishing and local HTTP/CoAP for integrations.

What is the range and update frequency?

Range is typically rooms up to a few tens of meters, depending on obstacles; battery-powered reporting is intermittent, USB-C allows for faster updates.

Can I create automations on % RV?

Yes, set thresholds (e.g. ventilation on at >60% RH, off at <50% RH) via Shelly app or Home Assistant/MQTT.