

🌟 Upgrade your smart home IQ with precision sensing that keeps you ahead!
The Shelly Plus Add-On is a compact, energy-efficient sensor interface designed for Shelly Plus and Gen3 devices. It supports up to five DS18B20 temperature sensors or one DHT22 humidity sensor, plus analog and digital inputs for diverse sensor types. With ±0.5°C accuracy, easy installation, and no hub required, it empowers professional-grade home automation and environmental monitoring with customizable scheduling and scene creation.

















| ASIN | B0BRBMKB53 |
| Best Sellers Rank | 24,273 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,999 in Electrical |
| Brand | Shelly |
| Country Of Origin | Bulgaria |
| Current Rating | 10 Milliamps |
| Current rating | 10 Milliamps |
| Customer Reviews | 4.8 out of 5 stars 1,385 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 |
| 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 |
| 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 |
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.
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.
R**R
Stand Shelly High Quality
Coming to really enjoy using Shelly products, I have one of these add ones but several 2P and an army of 1Ps around the house and they are just rock solid. This add on upgrade was a case of just switching off the parent device, attaching this and the temperature sensors to it and switching back on before adding the sensors in the app. Easy peasy, took all of 10 minutes to read the instructions and implement. Immediately shows up in Home Assistant and readings coming in. Exactly as IOT devices should be, easy and reliable.
A**R
It works, what more to say
Instructions in box very limited, look on the web for instructions.
Trustpilot
3 weeks ago
1 month ago