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🌿 Elevate your smart home ecosystem—because your comfort deserves precision and effortless control.
The Shelly Plus Add-On is a compact Wi-Fi and Bluetooth-enabled sensor hub designed to enhance Shelly Plus devices by supporting multiple temperature and humidity sensors. It enables smart automation like weather-sensitive irrigation and awning control, integrates seamlessly with Alexa and Google Home, and offers remote management through a dedicated app—all without requiring a hub. With a 3-year warranty and professional support, it’s a reliable upgrade for any modern smart home.

















| ASIN | B0BRBMKB53 |
| Best Sellers Rank | #39,402 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #37 in Automatic Irrigation Controllers |
| Brand | Shelly |
| Brand Name | Shelly |
| Customer Reviews | 4.7 out of 5 stars 1,604 Reviews |
| Global Trade Identification Number | 03800235266427 |
| Included Components | 1 x Shelly Plus AddOn, User manual |
| Item Dimensions | 1.46 x 1.65 x 1.46 inches |
| Item Weight | 13 g |
| Item dimensions L x W x H | 1.46 x 1.65 x 1.46 inches |
| Manufacturer | Allterco Robotics EOOD |
| Material | Plastic |
| Material Type | Plastic |
| Measurement Accuracy | Better than ±15% |
| Model | 3800235266427 |
| Mounting Type | Flush Mount |
| Number of Items | 1 |
| Output Type | Digital |
| Part Number | Plus Add-on |
| Specific Uses For Product | Light Sensitive Control, Motion-Controlled Lights, Smart Irrigation, Weather-Sensitive Awning, Garage Door position control |
| Style | Modern |
| Style Name | Modern |
| Unit Count | 1 Count |
| Upper Temperature Rating | 105 °F |
| Warranty Description | 3 Years Warranty |
S**O
Shelly Ecosystem is great in Home Assistant
I really like the Shelly Addon. In my case I am doing something very specific, I am using the addon out doors to monitor the temp of animal waterers. I *could* have built this sensor myself but given the fact that it has a case, and hooks right into the shelly plus devices, this was definitely the way to go over DIY. Sure I could have done it cheaper, but at the end of the day, the temperature rating for these devices and the whole package were a big part of the reason I bought these. Works great with Home Assistant. I don't use the Shelly cloud. I used to flash Shelly devices with Tasmota, but recently the Shelly firmware has gotten quite good and the updates for the firmware show up in the HA dashboard which is a big plus. The add on has a limited number of sensors that it supports so its not perfect, but it fit my usecase perfectly
K**R
Garage door automation
Used this to automate our garage doors. Worked very well.
M**O
Easy to use
Easy to use. Exceeded expectations. Allowed me to take what would have been a $1,300+ investment and do it for $30!
M**S
Very compact and works great
This works great. I have no problem with distance or connecting to my Hvac senxors
S**S
Love Shelly
Works great. love it
J**E
Shelly is Great
Shelly is a awesome device, works without issues and connects with home assistant. Setup up a multi sensor that track the duct system of my home HVAC and if the fan is running or not.
B**S
Great Mod for Shelly relay.
Wiht this add-on oyu can add tempiture sensor and have a heater come on if the Tempature gets too cold, and then go off before it gets hot. I have 2 now setup to turn on a heater in my pump station, and as a added bounis I can see what the temp it and it keeps a log.
J**G
Easy Smart Thermostat Alternative For Any DIY Enthusiast
I've been using Shelly devices for several years and have been consistently impressed. These add-ons are fantastic! I have one currently controlling my 240V, 3000W electric space heater. It's configured with one leg of the 240V connection (at 120V) running through the relay, which also powers the Shelly 1. This add-on is connected to a standard DS18B20 temperature probe. Using Shelly's virtual thermostat feature with this add-on, I can precisely control my shop's temperature from anywhere with an internet connection via the Shelly app. I also have another one of these units controlling an exhaust fan in a grow room, connected to a DHT20 temperature and humidity sensor. Both add-ons have been working flawlessly. You can use these devices with a variety of sensors, including soil temperature/moisture sensors, and they can be powered by DC as well. This adds tremendous value to Shelly Plus devices! I highly recommend these add-ons for any home automation project. They are easy to configure and use. In the future, I plan to add a display unit and an OpenHab server to create custom widgets showing the temperature and other metrics all in a nice wall display.
B**X
Il complemento perfetto per chi vuole fare domotica sul serio!
Ho preso questo Plus Add-On per integrarlo con uno Shelly Plus 1PM che gestisce l'automazione della caldaia. Da ex elettricista, trovo geniale l'idea di poter aggiungere ingressi analogici e digitali senza dover portare altri alimentatori in giro per la scatola di derivazione. Si aggancia a incastro sopra lo Shelly Plus (quelli con il chip ESP32 per intenderci) e via, hai subito a disposizione i pin per collegare sonde di temperatura DS18B20 o sensori di umidità . Io l'ho usato per monitorare la temperatura di mandata dei tubi e devo dire che la precisione è ottima se si scelgono sonde di qualità . Cose tecniche da tenere a mente: Installazione: Si monta a pressione, ma occhio a centrare bene i pin. Se forzate come dei fabbri rischiate di piegare tutto e addio add-on. Versatilità : Oltre alle temperature, potete collegarci potenziometri o sensori di livello per i serbatoi (molto utile se avete un pozzo o una cisterna). Software: Da programmatore, apprezzo che Shelly lo veda subito. Potete creare scene basate sulla temperatura che fanno scattare il relè sotto in base a soglie precise, tutto in locale senza cloud. Il "difetto", se così vogliamo chiamarlo, è che aumenta lo spessore totale dello Shelly. Se già facevate fatica a chiudere la 503 con uno Shelly normale, con questo montato sopra diventa un’impresa eroica. Vi consiglio vivamente di usarlo solo se avete spazio o se lo montate su barra DIN nel quadro, altrimenti preparatevi a lanciare qualche bestemmia durante il montaggio. Il mio consiglio da tecnico: Un piccolo trucco: quando collegate i sensori (specialmente se sono quelli a filo lungo), assicuratevi che i collegamenti siano fatti a regola d’arte, magari con dei micro-connettori o saldature protette da termorestringente. lasciar i filini volanti dentro una scatola dove passa anche la 230V è una follia: se un filo del sensore tocca la fase, bruciate l’add-on, lo shelly e probabilmente pure quello che c'è collegato. Tenete i circuiti SELV (bassa tensione) ben separati dai cavi di potenza. In definitiva, se volete trasformare un semplice interruttore in una centralina di controllo climatica o di monitoraggio, questo è l'accessorio definitivo. Costa poco e apre un mondo di possibilità . Consigliatissimo per chi ha un po' di manualità e vuole un impianto che faccia davvero "cose intelligenti" invece di accendere solo una lampadina.
C**N
Shelly no defrauda
Perfecto para el proyecto
X**X
Quick and easy way to monitor temperatures
I added this to a Shelly 1 Plus and fitted it with 5 long DS18B20 temperature sensors to be able to check that cold water pipes were not getting cold enough to freeze. The Shelly app shows the data as nice graphs, but I also have them connected to Home Assistant using MQTT, which works really well. It was very easy to install the device by clipping it to the Shelly 1 Plus and wiring in the sensor leads (although the screw terminals are really tiny).
W**R
Sehr zufrieden!
Ich bin äußerst zufrieden mit dem Shelly Plus Add-On und der dazugehörigen Smart Home Schnittstelle Plus Relais. Die digitale Steuerung ermöglicht eine bequeme und effiziente Kontrolle über meine smarten Geräte und Systeme im Zuhause. Die Installation war einfach und unkompliziert, auch für jemanden wie mich, der nicht unbedingt ein Technikexperte ist. Die Anleitung war klar und gut verständlich. Die Kompatibilität mit verschiedenen Smart-Home-Plattformen macht das Shelly Plus Add-On äußerst vielseitig und flexibel. Die Zuverlässigkeit der Steuerung beeindruckt mich besonders. Die Reaktionszeit auf Befehle ist schnell, und ich habe bisher keine Ausfälle oder Verbindungsprobleme erlebt. Die Möglichkeit, Zeitpläne einzurichten und Geräte ferngesteuert zu überwachen, hat meinen Alltag spürbar erleichtert. Ein weiterer Pluspunkt ist die Energieeffizienz des Shelly Plus Add-Ons. Die intelligente Steuerung ermöglicht es, Energie zu sparen, indem Geräte nur dann aktiviert werden, wenn sie benötigt werden. Insgesamt bin ich sehr zufrieden mit meiner Entscheidung für das Shelly Plus Add-On und kann es jedem empfehlen, der sein Zuhause auf smarte Weise steuern möchte. Es hat meine Erwartungen übertroffen und erleichtert meinen Alltag erheblich.Ich bin äußerst zufrieden mit dem Shelly Plus Add-On und der dazugehörigen Smart Home Schnittstelle Plus Relais. Die digitale Steuerung ermöglicht eine bequeme und effiziente Kontrolle über meine smarten Geräte und Systeme im Zuhause. Die Installation war einfach und unkompliziert, auch für jemanden wie mich, der nicht unbedingt ein Technikexperte ist. Die Anleitung war klar und gut verständlich. Die Kompatibilität mit verschiedenen Smart-Home-Plattformen macht das Shelly Plus Add-On äußerst vielseitig und flexibel. Die Zuverlässigkeit der Steuerung beeindruckt mich besonders. Die Reaktionszeit auf Befehle ist schnell, und ich habe bisher keine Ausfälle oder Verbindungsprobleme erlebt. Die Möglichkeit, Zeitpläne einzurichten und Geräte ferngesteuert zu überwachen, hat meinen Alltag spürbar erleichtert. Ein weiterer Pluspunkt ist die Energieeffizienz des Shelly Plus Add-Ons. Die intelligente Steuerung ermöglicht es, Energie zu sparen, indem Geräte nur dann aktiviert werden, wenn sie benötigt werden. Insgesamt bin ich sehr zufrieden mit meiner Entscheidung für das Shelly Plus Add-On und kann es jedem empfehlen, der sein Zuhause auf smarte Weise steuern möchte. Es hat meine Erwartungen übertroffen und erleichtert meinen Alltag erheblich.
J**N
Mycket bra
Fungerar perfekt
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