---
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: "$69"
currency: NZD
in_stock: true
reviews_count: 5
category: "Shelly"
url: https://www.desertcart.nz/products/520655680-shelly-plus-add-on-add-on-for-shelly-plus-gen3
store_origin: NZ
region: New Zealand
---

# Low 10mA power, no hub needed Analog & digital multi-sensor inputs ±0.5°C precision temp sensing 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:** $69
**Availability:** ✅ In Stock

## Summary

> 🌟 Upgrade your smart home IQ with precision sensing that keeps you ahead!

## 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?** $69 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/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

- • **Seamless Integration:** Clips easily to Shelly Plus or Gen3 devices, fitting standard electrical boxes.
- • **Energy-Efficient & Compact:** Operates at just 3.3V DC with minimal power draw, perfect for continuous monitoring.
- • **Smart Scheduling & Automation:** Create custom timers and scenes for effortless home or irrigation control.
- • **Universal Sensor Compatibility:** Supports analog & digital inputs for photoresistors, PIR, soil moisture & more.
- • **Precision Temperature & Humidity Monitoring:** Connect up to 5 DS18B20 or 1 DHT22 sensor for accurate environmental insights.

## Overview

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.

## Description

Free delivery and returns on all eligible orders. Shop 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.

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 | 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 |

## 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)

## Available Options

This product comes in different **Size** options.

## 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 New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-10*