Shelly H&T Gen3 White | Wi-Fi & Bluetooth Smart Temperature & Humidity Sensor with Remote App Control | Smart Scenes | LCD Display

I am a software developer. I spent a lot of time reviewing different devices, interfaces and their specifications. I wrote software to manage this device, including RPC, Bluetooth and MQTT. I am also very experienced in the dynamics of environmental monitoring for residential and commercial buildings. In my opinion this is an excellent humidity and temperature monitor at a low cost for home automation. The interfaces are well documented, easy to work with and there are numerous open-source implementations and libraries available. If you are a non-developer or a home automation user, this device will monitor humidity and temperature and perform well. I have read comments regarding long times to report changes. Temperature and humidity do not change rapidly in normal residential or commercial environments. If you require fast change detection, you are designing for a problem this device is not intended for. This device reports on wakeup every six minutes. The reason is to save battery life. That is sufficient in normal environments. If you require fast response times, select a different type of device that is plugged into a power source and reports continuously. The device will need to support rapid temperature and humidity changes and those types of instruments are much more expensive. The big issue is accuracy when detecting changes. It does no good to use a cheap device that reports every 5 seconds if the changes are only +-20% accurate. Accuracy requires either time or money.

I have three of these. I just have them hit a local web server and report temperature and humidity. If you want something to poll, this isn't what you are looking for. They instead only connect to wifi and "push" data when the temperature or humidity changes. I suspect thats due to it running on AA batteries, and trying to get good battery life. As long as you are okay with that, then these work great. I'm using one to check outdoor temperature, and one to monitor the temperature of my dog house. I have the web server kick on a local power switch when it gets too cold, which kicks on a 200w panel heater (designed for chickens) and warms the dog house. Then I have it kick off when it gets too hot. The dog appreciates it when its super cold out. I have it kick on at 55 and off at 65. I wouldn't want to use it for too narrow of a temperature range though because I've seen it wait until 53 to turn on and it sometimes stays on a few degrees higher then 65. I prefer Shelley devices since they can be used without cloud involvement and they are good for hobbyists that find no reason to send sensor data all the way to a data center just so local devices can then reach back out to the data center to act upon the data. When you have everything working locally, response times are in the millisecond range instead of the second range (which can grow to the minutes range during high usage).

I had great hope for this device. On paper it looked perfect for my use case and I purchased six units. I returned all six after two units failed to operate on battery and a third was intermittent on battery. I did not have time to debug the problem. With that said, registering the device is not clean and simple, and I was able to mess it up, but once configured one unit seemed to work well. Note, to conserve battery power, these devices report temp and humidity once, then power down WiFi and wait for the temp or humidity to change before powering up WiFi and reporting the new values. So if temp or humidity change a lot, then battery life will be shorter. The ePaper display is a great idea if you need to directly see the measured temp and humidity vs checking the app. The app allows you to bias the measured temp and humidity readings, so you can sync the units to one another or another thermostat. This is a useful feature to compensate for normal variations between devices. Again, the device looked good on paper, but the battery issue was killer for me.

Pretty accurate hygrometer with great e-paper (e-ink?) display. Display is large enough to read everything clearly without my glasses and set up was fairly easy. Bought this unit because of the flexibility to take batteries for power or use USB cable to power the unit as we didn’t want to replace or recharge batteries frequently, in addition to good display. Knocked off 1 star because USB cable needs to be removed every time the back cover needs to be removed to sync. Sync/reset button is under the battery cover, and the cover cannot be removed without unplugging USB cable. (Only required during initial setup) Shouldn’t be a problem for those who choose batteries. Specifically bought this unit to hook it up with Home Assistant with Shelly plugin and it did not disappoint. Picked it up fine and reading well over WiFi. The price of this unit is about the same as other WiFi Hygrometers on the market, but can be expensive if we wanted this throughout the house. But for the reliability so far of Shelly products, we’d definitely consider this unit again.

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✨ Sensor Shelly H&T Gen 3: La Evolución de la Comodidad Domótica ✨ El Shelly H&T Gen 3 no es solo una actualización, es un salto generacional que redefine lo que un sensor de temperatura y humedad puede ofrecer. Shelly ha escuchado a su comunidad y ha entregado un dispositivo imprescindible para cualquier entusiasta de la domótica que busque precisión, autonomía y una integración perfecta. ¡Es la estrella indiscutible de su categoría! 🚀 Rendimiento y Novedades (5/5) • Chip Shelly de Nueva Generación: Equipado con el nuevo chip de Shelly y 8MB de memoria, el Gen 3 es notablemente más rápido y receptivo que sus predecesores. La velocidad de las notificaciones y la actualización de la información es inmediata, garantizando que siempre estés al tanto de las condiciones de tu hogar. • Pantalla E-Ink Mejorada: La inclusión de una pantalla de papel electrónico (E-Ink) con reloj incorporado es un acierto brillante. Ofrece una lectura clara y nítida de la temperatura y humedad con un consumo de energía mínimo, haciendo que la información esté disponible de un vistazo sin sacrificar la vida útil de la batería. • Conectividad Híbrida: Mantiene su excelente conectividad Wi-Fi sin necesidad de hub, pero ahora añade Bluetooth para una inclusión aún más rápida y la posibilidad de utilizarlo como puerta de enlace, ampliando sus capacidades de automatización. 🔋 Autonomía y Alimentación (5/5) • Duración de Batería Excepcional: Su diseño de bajo consumo le permite operar con 4 pilas AA hasta por un año (o incluso más, dependiendo de la configuración), liberándote de la necesidad constante de cambiar baterías. • Alimentación USB-C: La adición de una ranura USB Tipo-C no solo facilita una conexión más rápida para la configuración y firmware updates, sino que también ofrece la opción de alimentación constante (5V) si lo prefieres. 🏠 Integración y Versatilidad (5/5) • Ecosistema Shelly y Automatización: El H&T Gen 3 brilla cuando se integra con otros dispositivos Shelly. Puedes configurar automatizaciones de clima complejas (por ejemplo, encender el Shelly TRV o un aire acondicionado a través de un Shelly Plug) basándose en las lecturas de temperatura o humedad, creando un ambiente siempre confortable. • Compatibilidad Universal: Funciona a la perfección con las principales plataformas de domótica como Google Assistant, Alexa y Home Assistant, garantizando que se adapte sin problemas a tu configuración actual. • Almacenamiento de Datos Gratuito: Ofrece hasta 1 año de almacenamiento de datos gratuito en la nube de Shelly, lo que te permite analizar las tendencias climáticas de tu hogar para tomar decisiones más inteligentes sobre calefacción, refrigeración y ventilación. 📝 Conclusión El Shelly H&T Gen 3 es la solución definitiva para el monitoreo de temperatura y humedad. Su combinación de un chip potente, una pantalla E-Ink funcional, una batería de larga duración y una conectividad dual (Wi-Fi/Bluetooth) lo convierten en una inversión inteligente para cualquier hogar inteligente. Olvídate de los sensores lentos y de las pilas que duran un suspiro; este dispositivo es sinónimo de fiabilidad y eficiencia. ¡Una compra obligatoria para mantener un clima interior saludable y optimizar la eficiencia energética!

Top quality product from a top quality company. It works perfectly, the values are quite precise, battery life is acceptable.

Der Shelly H&T Gen3 überzeugt mich vor allem durch seine zuverlässige und gut ablesbare Anzeige von Temperatur und Luftfeuchtigkeit. Die Messwerte wirken plausibel und reagieren schnell auf Veränderungen – genau das, was man von einem Sensor erwartet, bevor man ihm größere Aufgaben anvertraut. Die Einrichtung über die Shelly-App ging unkompliziert, ein zusätzlicher Hub ist nicht nötig (Danke dafür, wirklich). App-Anbindung, Historie und Benachrichtigungen funktionieren problemlos. Auch die Integration in Alexa ist vorhanden, wird von mir aktuell aber nicht aktiv genutzt. Wichtig zur Einordnung: 👉 Ich nutze den Sensor derzeit ausschließlich zur Anzeige und Überwachung, nicht zur aktiven Steuerung oder Regelung von Geräten oder Szenen. Dafür macht er seinen Job aber absolut zuverlässig. Das Design in Schwarz ist unauffällig und hochwertig, passt gut in Wohn- oder Technikräume. Genau deshalb gibt es auch jetzt schon 5 Sterne – mit dem klaren Potenzial, die Bewertung später noch um Erfahrungen aus Automationen und smarten Szenen zu ergänzen. Kurz gesagt: Ein sehr solider Smart-Sensor, der schon im „passiven Betrieb“ überzeugt – und vermutlich noch mehr kann, wenn man ihn lässt.

This is part of a range of devices that Shelly sell to control items around the home, as such to get the most out of it you do have to carry out some work yourself. That said, this is a very easy device to set up: insert the batteries, use a mobile phone to connect to the device, set up the wifi and away you go. The display is very clear and easy to read and the device feels good quality. It comes with a simple stand and can also be wall mounted or stuck onto a wall with the supplied pads. You can connect it to other systems and then use the readings to control other devices. Many people seem to connect it to home assistant but it can also connect to other systems with some work. I connect it to a MQTT broker and then use that to connect to Apple home where it displays the temperature and humidity. The device only connects to the Wifi system for a few seconds to update it's values and then goes back to sleep, however as the display is an e-paper display this stays on. The device updates it readings every so often (I think it states every two hours if nothings changes), or whenever they change by a certain amount, thus conserving battery life. Consequently it can be a few tenths of a degree out before it updates. It can also be triggered by a change in humidity which it also displays. I like these devices, they seem to be the best from Shelly and I intend to get several more. Note the Shelly web site states these will be upgraded to matter in the future, and when this happens you should be able to connect to a wider range of systems directly.