---
product_id: 520655680
title: "Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required"
brand: "shelly"
price: "€ 47.82"
currency: EUR
in_stock: true
reviews_count: 10
category: "Shelly"
url: https://www.desertcart.sk/products/520655680-shelly-plus-add-on-add-on-for-shelly-plus-gen3
store_origin: SK
region: Slovakia
---

# 3.3V low power operation Analog & digital inputs 5x DS18B20 sensors or 1x DHT22 Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required

**Brand:** shelly
**Price:** € 47.82
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your smart home game with precision sensing—no hub, no limits!

## Quick Answers

- **What is this?** Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required by shelly
- **How much does it cost?** € 47.82 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/520655680-shelly-plus-add-on-add-on-for-shelly-plus-gen3)

## Best For

- shelly enthusiasts

## Why This Product

- Trusted shelly brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-Sensor Mastery:** Connect up to 5 temperature sensors or 1 humidity sensor for ultra-precise environmental insights.
- • **Seamless Smart Home Sync:** Easily integrates with Shelly ecosystem and popular platforms like Home Assistant via MQTT for real-time data & control.
- • **Plug & Play Power Efficiency:** Runs on just 3.3V DC from your Shelly Plus or Gen3 device—no extra hub or power hassle needed.
- • **Universal Sensor Compatibility:** Supports analog and digital inputs—perfect for motion, light, soil moisture & more automation triggers.
- • **Custom Automation at Your Fingertips:** Set personalized schedules, timers, and scenes per channel to automate your home exactly how you want it.

## Overview

The Shelly Plus Add-On is a compact, versatile 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 a wide range of sensors. Operating at 3.3V DC without requiring a hub, it enables precise temperature and humidity monitoring and advanced home automation with customizable schedules and seamless integration into smart home ecosystems.

## Description

From the manufacturer Sensor Integration Shelly Plus Add-on is compatible with most Arduino sensors! Use its digital or analog inputs to measure your desired parameters and create complex automation scenes based on the sensor data. Sensor Integration Shelly Plus Add-on is compatible with most Arduino sensors! Use its digital or analog inputs to measure your desired parameters and create complex automation scenes based on the sensor data. Improved Security Enhance your Shelly Plus with advanced security. Our add-on ensures robust protection, safeguarding your smart home devices from unauthorized access and threats. Secure your peace of mind today. Improved Security Enhance your Shelly Plus with advanced security. Our add-on ensures robust protection, safeguarding your smart home devices from unauthorized access and threats. Secure your peace of mind today. Easy Installation Install the Shelly Plus add-on effortlessly. Its user-friendly design ensures quick, hassle-free setup, so you can enhance your smart home system in no time. Get connected easily and swiftly. Easy Installation Install the Shelly Plus add-on effortlessly. Its user-friendly design ensures quick, hassle-free setup, so you can enhance your smart home system in no time. Get connected easily and swiftly. Digital and Analog Inputs The Shelly Plus add-on supports both digital and analog inputs, providing versatile connectivity for your smart home. Easily integrate various sensors and devices for enhanced functionality. Digital and Analog Inputs The Shelly Plus add-on supports both digital and analog inputs, providing versatile connectivity for your smart home. Easily integrate various sensors and devices for enhanced functionality. Compact Design The Shelly Plus add-on features a compact design, seamlessly integrating into your setup without taking up extra space. Enjoy powerful performance in a sleek, space-saving package. Compact Design The Shelly Plus add-on features a compact design, seamlessly integrating into your setup without taking up extra space. Enjoy powerful performance in a sleek, space-saving package. Energy Efficiency Boost your energy savings with the Shelly Plus add-on. Designed for optimal energy efficiency, it minimizes power consumption while maximizing performance. Save energy and reduce costs effortlessly. Energy Efficiency Boost your energy savings with the Shelly Plus add-on. Designed for optimal energy efficiency, it minimizes power consumption while maximizing performance. Save energy and reduce costs effortlessly. Motion-Controlled Lights Smart Irrigation Weather-Sensitive Awning Light Sensitive Control Always Informed Garage Door position Shelly Plus Add-On can be connected to a PIR sensor to light up rooms you occasionally use. Enter the room and the light will come on for as long as you need it. Automate your irrigation system with Shelly Plus Add-On and a soil moisture sensor. The Add-On will trigger Shelly Plus 1 to water your garden only when necessary, saving time and costs.​ Combine Shelly Plus Add-On with a wind sensor to trigger Shelly Plus 2PM to close awnings during strong winds. Use it with a rain sensor to trigger opening awnings and shelter guests from rain.​ Use an LDR (photoresistor) with Shelly Plus Add-On and trigger Shelly Plus 2PM to open blinds when it's too dark during the day or turn on lights at just the right time when luminosity is low.​ Measure precise aquarium and room temperature with Shelly Plus Add-On and DS18B20 sensors. Connect a liquid level sensor to ensure optimal water levels, maintaining a healthy environment for pets.​ Connect a reed-switch sensor to Shelly Plus Add-On to monitor your garage door's state. Always know if it's open or closed when you're away and take appropriate action.​ Technical Information Create Smart Scenes with Shelly Plus Add-On Shelly 1 Gen3 Shelly 1PM Gen3 Shelly 2PM Gen3 Garage door position Connect a reed-switch to Shelly Plus Add-on for real-time garage door status. Appliance Power Monitoring With Shelly Plus Add-on, monitor multiple appliances, identify high energy usage Adjust lighting by luminosity With an LDR, Shelly Plus Add-on opens blinds in daylight and triggers lights. Irrigation only when needed Using a soil moisture sensor, Shelly 1 Gen3 triggers efficient irrigation. Always informed With Plus Add-on and DS18B20 sensors, monitor aquarium and room temperatures. Weather-responsive awning Protect motorized awnings from strong wind with Shelly 2PM Gen3 and wind sensor.

Review: 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.
Review: 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).

## Features

- 𝗩𝗲𝗿𝘀𝗮𝘁𝗶𝗹𝗲 𝗦𝗲𝗻𝘀𝗼𝗿 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: Connects up to five DS18B20 temperature sensors or one DHT22 sensor via 1-Wire terminals, enabling precise temperature and humidity monitoring for various applications
- 𝗔𝗻𝗮𝗹𝗼𝗴 & 𝗗𝗶𝗴𝗶𝘁𝗮𝗹 𝗜𝗻𝗽𝘂𝘁𝘀: Features both analog and digital inputs, allowing integration with a wide range of sensors such as photoresistors, PIR motion detectors, soil moisture sensors, and more for comprehensive automation scenarios
- 𝗖𝗼𝗺𝗽𝗮𝗰𝘁 & 𝗘𝗮𝘀𝘆 𝗜𝗻𝘀𝘁𝗮𝗹𝗹𝗮𝘁𝗶𝗼𝗻: Operates on 3.3 V DC supplied by the connected Shelly Plus or Gen3 device and mounts easily alongside it inside standard electrical boxes
- 𝗦𝗰𝗵𝗲𝗱𝘂𝗹𝗶𝗻𝗴 & 𝗧𝗶𝗺𝗲𝗿𝘀: Set up timers and personalized schedules per channel or create scenes for full-home automation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BRBMKB53 |
| Best Sellers Rank | 74,938 in DIY & Tools ( See Top 100 in DIY & Tools ) 7,665 in Electrical |
| Brand | Shelly |
| Country Of Origin | Bulgaria |
| Current Rating | 10 Milliamps |
| Current rating | 10 Milliamps |
| Customer Reviews | 4.8 out of 5 stars 1,510 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 |
| 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 |

## Product Details

- **Brand:** Shelly
- **Item dimensions L x W x H:** 37 x 42 x 37 millimetres
- **Item weight:** 13 Grams
- **Material:** Plastic
- **Style:** Pack of 1

## Images

![Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required - Image 1](https://m.media-amazon.com/images/I/81WwVQX0FrL.jpg)
![Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required - Image 2](https://m.media-amazon.com/images/I/71RSqfiAzpL.jpg)
![Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required - Image 3](https://m.media-amazon.com/images/I/81dC8uk7XlL.jpg)
![Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required - Image 4](https://m.media-amazon.com/images/I/71nwrtMGXrL.jpg)
![Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required - Image 5](https://m.media-amazon.com/images/I/815Idnx942L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Add on to a Shelly one.
*by U***D on 5 August 2025*

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.

### ⭐⭐⭐⭐⭐ Quick and easy way to monitor temperatures
*by X***X on 4 January 2026*

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).

### ⭐⭐⭐⭐⭐ Watch out for VPN's
*by A***8 on 13 December 2025*

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.

## Frequently Bought Together

- Shelly Plus Add-On | Wi-Fi & Bluetooth Add-On for Shelly Plus Devices | Measure Temperature and Humidity | Home Automation | Works with Alexa & Google Home | iOS Android App |No Hub | Digital Sensor
- Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-05-27*