






🏠 Elevate your smart home game — sensor power that keeps you ahead of the curve!
The Shelly Plus Add-On is a compact, versatile sensor module designed for Shelly Plus Gen3 and Gen4 devices. It supports up to five DS18B20 temperature sensors or one DHT22 humidity sensor, plus analog and digital inputs for a wide range of sensors like PIR, soil moisture, and photoresistors. Operating at 3.3V DC without requiring a hub, it enables precise environmental monitoring and advanced home automation with customizable schedules and real-time alerts, making it an essential upgrade for any smart home enthusiast.

| Asin | B0BRBMKB53 |
| Best Sellers Rank | 66,930 in DIY & Tools (See Top 100 in DIY & Tools) 7,131 in Electrical |
| Brand | Shelly |
| Current Rating | 10 Milliamps |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,628) 4.8 out of 5 stars |
| Eu Spare Part Availability Duration | 3 Years |
| Global Trade Identification Number | 03800235266427 |
| Included Components | 1x Shelly Plus Add-ON |
| Item Dimensions | 37 x 42 x 37 millimetres |
| Item Weight | 13 Grams |
| Manufacturer | Shelly Europe |
| Manufacturer Part Number | Plus Add-on |
| Material | Plastic |
| Maximum Supply Voltage | 3.3 Volts (DC) |
| Measurement Accuracy | ±0.5°C |
| Measuring Range | Abhängig von den Sensoren DS18B20 oder DHT22 |
| Model Number | 3800235266427 |
| Mounting Type | Flush Mount |
| Number Of Items | 1 |
| Output Type | Analogue, digital |
| Product Warranty | 2 Year Manufacturer Guarantee |
| Specific Uses For Product | Temperature and humidity sensing, home automation control, irrigation automation |
| Style Name | Pack of 1 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 125 Degrees Celsius |
User
Five probes down my hot water cylinder, works a treat
Brilliant little add-on. I've got it clipped onto a 12V Shelly 1 Gen3 on my hot water cylinder, with five DS18B20 probes spaced down the height of the tank. That gives me a proper temperature profile, so I can work out how many usable litres of hot water are left and push it into Home Assistant over MQTT. Tiny, cheap and rock solid since it went in. Great bit of kit if you like tinkering.
User
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).
User
Watch out for VPN's
Works well. Added the unit to a Shelly 1PM to get powered, first time using Shelly products had a slight problem getting the device to sync up with app, figured out it was a VPN problem and now it works. Added a 2 temp sensors on my hot water tank and works perfectly. Wished I knew about these devices earlier.
User
Great Add on to a Shelly one.
Fantastic add on to a Shelly one.Used it for monitoring the temperature on my boilers flow and return pipes. With an additional device in the pump cupboard I can see the heat loss on the pipes from the boiler to the pump and back to the boiler.I’ve not got a condensing boiler so the return temperature is not critical, but when I have to replace my old boiler I should be able to predict what flow temperature I can run and I can see the impact of inculcation on my pipe work.
User
It works, what more to say
Instructions in box very limited, look on the web for instructions.
User
Parfait
Fonctionne très bon
User
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
User
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.
User
Shelly no defrauda
Perfecto para el proyecto
User
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.
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