Shelly
Shelly H&T Gen3
- Native integration
- Local control
- Wi-Fi
- Bluetooth
Prices verified November 2026
See more sensors picks on our Amazon storefront →Our verdict
A Wi-Fi temperature and humidity sensor with an e-paper display, so you can read the room without opening an app. It runs on four AA cells or USB-C, and the catch is how often it reports: on batteries it wakes roughly every two hours, on USB about every five minutes, so it suits slow-changing readings rather than triggering fast automations. Needs no hub, but it does sit on your Wi-Fi, so check signal where you mount it.
What can Home Assistant control on the Shelly H&T Gen3?
| Control | Type | What it does |
|---|---|---|
| Temperature | Sensor (read-only) | Room temperature in °C |
| Humidity | Sensor (read-only) | Relative humidity in % |
| Battery | Sensor (read-only) | Battery level when running on AA cells |
Added through Home Assistant's built-in Shelly integration, which talks to the device locally rather than via Shelly's cloud. Because it sleeps between check-ins, entities only update when it wakes (or on a big enough change), and commands or setting changes are applied on the next wake. Power it over USB-C if you want fresher readings.
Specs
| power | 4x AA or USB-C (USB-C does not charge the batteries) |
|---|---|
| reporting | Wakes every ~2 h on battery, ~5 min on USB (per Amazon UK listing) |
How does the Shelly H&T Gen3 compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| Shelly H&T Gen3 (this product) | — | Wi-Fi, Bluetooth | Yes | Native |
| Aico Ei3016 (Mains Optical Smoke Alarm) | £53.89 | Wi-Fi | Cloud | HACS |
| Airthings View Plus | £259 | Wi-Fi, Bluetooth | Cloud | Native |
| Apollo Automation MSR-2 mmWave Multisensor | £38.7 | Wi-Fi, Bluetooth | Yes | Native |
Frequently asked questions
- Does the Shelly H&T Gen3 work with Home Assistant locally?
- Yes. The Shelly H&T Gen3 is controlled locally in Home Assistant through a built-in Home Assistant core integration (shelly), so it keeps working if your internet connection or the Shelly cloud goes down. Control and state updates stay on your own network.
- Which protocol does the Shelly H&T Gen3 use, and do I need a hub?
- The Shelly H&T Gen3 uses Wi-Fi and Bluetooth. To pair it with Home Assistant you need no hub — it joins your Wi-Fi network directly; or a Bluetooth adapter on your Home Assistant host or an ESPHome Bluetooth proxy. Shelly's own hub is not required when you integrate through a built-in Home Assistant core integration (shelly).