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🌟 Elevate your smart home game with precision sensing and effortless automation!
The Shelly Plus Add-On is a compact, energy-efficient sensor module designed to expand your Shelly Plus Gen3 or Gen4 device capabilities. It supports up to five DS18B20 temperature sensors or one DHT22 humidity sensor via 1-Wire, plus analog and digital inputs for versatile sensor integration. With easy installation, no hub required, and advanced scheduling features, it empowers professional-grade home automation and real-time environmental monitoring with robust security.

















| ASIN | B0BRBMKB53 |
| Best Sellers Rank | 48,617 in DIY & Tools ( See Top 100 in DIY & Tools ) 5,113 in Electrical |
| Brand | Shelly |
| Current Rating | 10 Milliamps |
| Current rating | 10 Milliamps |
| Customer Reviews | 4.8 out of 5 stars 1,576 Reviews |
| 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 |
| Item dimensions L x W x H | 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 | Pack of 1 |
| Style Name | Pack of 1 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 125 Degrees Celsius |
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).
A**8
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.
U**D
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.
A**R
It works, what more to say
Instructions in box very limited, look on the web for instructions.
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.
C**N
Shelly no defrauda
Perfecto para el proyecto
J**1
Produit shelly au top
C'est le deuxième module que j'achète, j'ai déjà toute une gamme de chez Shelly. Comme à chaque fois, très facile à mettre en place et en service. Mesure de trois température pour mes panneaux solaire qui est très précise (1/2 degré) et réelle, avec historique, déclenchement de scénario, de notifications (je reçois un mail dès que la température dépasse un seuil programmé), etc...
J**N
Mycket bra
Fungerar perfekt
V**7
Ottimo prodotto
Ottimo prodotto che offre varie funzionalità. Per me, semplice da installare, in quanto e’ il mio lavoro…
Trustpilot
1 week ago
2 weeks ago