A comfortable home is one that quietly maintains the right temperature and humidity. Get these two foundations right and everything else follows: better sleep, fewer allergens, reduced condensation, and lower energy waste. The Shelly H&T Gen3 is built for that everyday balance. It is a compact Wi-Fi humidity and temperature sensor that brings room conditions into clear focus so you can act with confidence, not guesswork.
This latest generation refines the idea of “ambient awareness” into something elegant and practical. The finish blends into modern interiors, while the low-power e-ink display keeps readings visible without glare or distraction. Inside, the upgraded platform wakes quickly, connects reliably, and feeds accurate data to your favourite automations.
The promise is simple: instant insight, minimalist design, and true autonomy. You can run it from four AA batteries for up to a year or switch to USB-C for always-on dashboards. There is no hub to manage. Just add it to Wi-Fi, place it where it matters, and let the Shelly H&T Gen3 make comfort visible, every hour of every day.
What’s new in Shelly H&T Gen3 (at a glance)
The Shelly H&T Gen3 brings a fresh balance of design, practicality, and performance. Every improvement centres on simplicity, faster setup, longer endurance, and clearer feedback for daily comfort.
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Wi-Fi and Bluetooth connectivity — no hub required
Connects directly to your home network for instant readings and app access. Bluetooth speeds up onboarding, making first-time setup seamless. -
Low-power e-ink display with built-in clock
The elegant e-paper screen stays readable at all times while consuming minimal power. The integrated clock keeps data time-stamped even when offline. -
Optional USB-C power for faster updates and always-on dashboards
Run on battery for long intervals or power via USB-C when you need near real-time data and continuous display refreshes. -
Long battery life (up to 1 year on 4 × AA)
Designed for efficiency, it delivers up to twelve months of operation without compromise in precision. -
Free one-year data history in the Shelly Smart Control app
View trends, spot humidity patterns, and fine-tune heating or ventilation with full-year insight, all stored securely at no extra cost.
Each feature reflects the same design philosophy: low effort, high awareness. From the effortless Bluetooth pairing to the quiet reliability of its e-ink display, the Shelly H&T Gen3 offers practical innovation that looks as good as it performs.
Design that blends in ... and stands out!
Every detail of the Shelly H&T Gen3 reflects a deliberate blend of function and form. This is smart sensing reimagined for spaces where technology should disappear into the design, not dominate it.
Understated, modern aesthetic
The Gen3 edition brings a clean, professional look that complements modern interiors, whether mounted discreetly on a hallway wall, placed beside a workstation, or set neatly on a bedside table. Its deep matte finish resists glare and fingerprints, offering a tactile, understated presence that feels as refined as the data it delivers.
Compact and versatile form
At just 70 × 70 mm, the H&T Gen3 keeps a minimal footprint while offering flexibility in placement. Use the included stand for quick setup on any flat surface, or wall-mount it for a permanent, streamlined look. Whichever way you install it, the design feels intentional, neat, balanced, and free from visual clutter.
E-paper clarity that always looks calm
The low-power e-ink display is central to its quiet appeal. Instead of bright LEDs or flickering backlights, it uses soft contrast to show temperature, humidity, and time, clearly visible at any angle, in daylight or low light, without eye strain. The e-paper screen refreshes only when values change, conserving energy while keeping the display naturally calm and always legible.
Design meets data
The H&T Gen3 turns environmental data into a subtle design element. It brings professional accuracy without drawing attention to itself, proof that smart technology can enhance a space visually as well as functionally. It’s the sensor you’ll notice only when you want to, seamlessly blending reliable insight with timeless style.
Battery or USB-C — choose your rhythm
One of the smartest design touches in the Shelly H&T Gen3 is how it adapts to your lifestyle. Whether you prefer a set-and-forget sensor or a permanently powered data source, it gives you the flexibility to decide how it runs, and how often it reports.
Long-life battery mode
Running on four AA batteries, the H&T Gen3 can operate for up to a year under typical conditions. In this mode it wakes on schedule or when temperature or humidity cross predefined thresholds, then returns to deep sleep to conserve energy. It’s the perfect fit for bedrooms, hallways, or secondary rooms where quiet, maintenance-free monitoring matters more than second-by-second updates.
Continuous USB-C mode
Plug in USB-C power when you want near-real-time visibility. This keeps the device awake for quicker updates and tighter automation loops, ideal for Home Assistant dashboards, climate-control scripts, or precise dew-point calculations. With continuous power, the e-ink display refreshes instantly, and your automations react the moment conditions change.
How behaviour affects endurance
Update frequency, threshold sensitivity, and Wi-Fi strength all influence battery life. Smaller reporting intervals or frequent signal retries naturally use more power, while a strong local network and modest thresholds help the sensor stay efficient.
Pro tip
For the best of both worlds, combine several battery-powered units around the home for ambient tracking, then keep one USB-powered “reference” sensor in a key location for live dashboards and fast automations. Together they provide a complete, resilient picture of your indoor climate without sacrificing convenience or accuracy.
The result is simple: whichever rhythm you choose, the Shelly H&T Gen3 delivers consistent data, flexible power options, and effortless reliability that adapts to how you live.
Precision that earns trust
Accuracy is the foundation of good automation. The Shelly H&T Gen3 measures within the everyday comfort band with confidence, reading temperature from 0 °C to 40 °C and humidity from 30 to 70 percent RH with consistent stability. That reliability shows up in the small things: smoother heating cycles, better dehumidifier control, and fewer false alerts when the weather swings.
Built on a faster, steadier platform
At its core is Shelly’s latest platform with 8 MB memory, engineered for quick wake-ups and stable Wi-Fi sessions. The result is snappy reporting when thresholds are crossed, dependable reconnection after sleep, and fewer gaps in your graphs. Whether on batteries or USB-C, the sensor behaves predictably, which is exactly what you want when automations depend on fresh data.
Trends that inform real decisions
You get one year of free data history in the Shelly Smart Control app. That long view turns raw numbers into useful patterns: spot evening humidity rises, link temperature dips to ventilation habits, and fine-tune setpoints to cut energy waste without sacrificing comfort. If you manage multiple rooms, those trends make it obvious where a small adjustment delivers a big win.
Consistent in real homes
Community users highlight what you notice after a week or two: readings that track together across rooms, calm e-ink updates without flicker, and integrations that keep dashboards tidy. It is the kind of quiet consistency that builds trust, and it is why the Shelly H&T Gen3 becomes the reference point you check before you tweak the thermostat or kick on a dehumidifier.
In short, this is a Wi-Fi temperature and humidity sensor designed to produce clean, repeatable data. The hardware is fast, the network behaviour is steady, and the history view turns measurements into insight you can act on with confidence.
Setup that feels effortless
Getting the Shelly H&T Gen3 online is refreshingly simple. It’s designed to pair quickly, live locally on your Wi-Fi, and slot neatly into whatever level of automation you prefer.
Quick Bluetooth onboarding
- Open the Shelly Smart Control app and start a new device scan.
- The sensor advertises over Bluetooth so it appears in seconds.
- Enter your Wi-Fi details, name the device, and you’re done. The app will guide you through a brief first-run check so temperature, humidity and time are set correctly.
No hub required
The H&T Gen3 talks directly to your router. You can use the Shelly app for dashboards and schedules, or keep everything on your LAN with local integrations. There’s nothing else to buy or maintain.
Local control for integrators
Prefer DIY platforms and local messaging?
- MQTT: Publish temperature and humidity to your broker for fast, scriptable automations.
- Webhooks: Trigger URLs on threshold events (for example, start a fan when humidity rises).
These options make it easy to connect the sensor to Home Assistant, Node-RED, or a custom backend without relying on the cloud.
First-pairing tips
- Naming: Use room-based names like “Bedroom H&T” or “Kitchen H&T” so entities stay clear in dashboards.
- Placement: Mount at about 1.5 m height, away from direct sunlight, radiators, and exterior doors. Avoid corners where airflow is stagnant.
- Network: Strong 2.4 GHz coverage improves stability and battery life. A DHCP reservation keeps IPs predictable for MQTT and webhooks.
- Initial checks: After pairing, compare readings with a known reference in the same spot for a few minutes. Minor offsets are normal across different sensors; what matters is consistency over time.
Ready in minutes
From unboxing to first graphs, the process is quick and reliable. Bluetooth gets you set up without fuss, direct Wi-Fi keeps control local, and optional MQTT/Webhooks give power users all the hooks they need. The result is a sensor that feels effortless to install and dependable to live with.
Placement tips for optimal readings
Accurate data starts with good positioning. Where and how you place the Shelly H&T Gen3 has a direct effect on the precision and stability of its readings. A few thoughtful placement choices ensure your automation routines respond to genuine room conditions, not transient air pockets or external influences.
Stay clear of heat, sun, and drafts
Avoid placing the sensor near radiators, vents, or windows that receive direct sunlight. These spots can create temperature spikes and misleading humidity dips. For representative ambient readings, install the sensor roughly 1.5 metres (about eye level) from the floor in an open area with steady airflow.
Wall or stand—your choice
The included wall-mount option keeps airflow consistent and protects the sensor from accidental bumps in busy areas. For desks, shelves, or bedside tables, the stand version gives flexibility to reposition and test different zones without tools. Both setups ensure the e-ink display stays easy to read and stable over time.
Create zoned comfort monitoring
Homes rarely have uniform conditions. Linking multiple Shelly H&T Gen3 sensors, for example, one in the living room, one in the bedroom, and one near key humidity sources, builds a richer, more responsive picture of your environment. Each unit’s data helps fine-tune heating, cooling, and ventilation by zone, improving comfort and efficiency without guesswork.
Pro insight
For best results, let the sensor acclimatise for at least an hour after placement before trusting initial readings. This allows its sensing element to stabilise with the local microclimate.
Thoughtful placement turns the Shelly H&T Gen3 from a single-point monitor into a true environmental reference, delivering the accuracy and reliability your smart home depends on.
In short: the Shelly H&T Gen3 is both a dependable Wi-Fi temperature and humidity sensor today and a platform for future innovation. It integrates easily now, plays well with your broader Shelly ecosystem, and is built to stay relevant as Matter and next-generation standards continue to mature.
FAQs
Does Shelly H&T Gen3 work offline?
Yes. It offers full local control via Wi-Fi or MQTT, so your automations keep running even when the internet is down. (See section 6.)
Can it integrate with Home Assistant?
Absolutely. You can add it directly through the Shelly integration or connect via MQTT topics for flexible, local-first automation. (See section 7.)
Is the display always on?
Yes. The e-ink screen stays visible at all times, showing temperature, humidity, and time without backlight glare or extra power draw. (See section 3.)
What’s the battery life?
Up to a full year on four AA batteries in standard reporting mode. Powering by USB-C gives continuous operation and faster update cycles. (See section 4.)
Can I wall-mount it?
Yes. The supplied stand and built-in wall-mount points support either a fixed or freestanding setup, ensuring good airflow and easy readability. (See section 9.)
Is Matter support available?
Not yet, but the Gen3 hardware is based on Shelly’s new platform with 8 MB flash, ready for future firmware updates and protocol expansion. (See section 10.)
