# Built-in Temperature Sensor Shelly Plus Add-On — wired indoor/outdoor sensor, -20–40°C, 37×42×15 mm

**URL:** https://aio.lv/en/product--shelly-allshellyplusadd-on--7771284
**Data updated:** 2026-01-21 11:00 (EET)
**Category:** Smart Sensors
**Manufacturer:** Shelly
**Manufacturer code:** ALL\_SHELLY\_PLUS\_ADD-ON
**EAN:** 3800235266427
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 12.39 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--shelly-allshellyplusadd-on--7771284

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Shelly Plus Add-On built-in temperature sensor is a wired indoor/outdoor sensor with compact dimensions 37×42×15 mm. It measures temperature in the -20 to 40 °C range and operates at 0–2000 m altitude and 30–70% relative humidity. Made of plastic and weighing 105 g, it is designed for integration into smart-home or monitoring systems to provide accurate ambient temperature readings.

## Long description

The Shelly Plus Add-On is a compact, galvanically isolated sensor interface designed for use with Shelly Plus relays. Measuring 37 × 42 × 15 mm, it supports 1-Wire temperature sensors and a variety of analog and digital sensors for both indoor and outdoor monitoring. The Add-On enables precise measurement of temperature and humidity and expands relay capabilities to create complex automation scenes.
Advantages
Galvanic isolation ensures safe sensor connections to Shelly Plus relays. The module is compatible with most Arduino sensors and accepts analog, digital and 1-Wire inputs for flexible integration. Its small built-in form factor makes it suitable for concealed installation while providing reliable monitoring for temperature, humidity, luminosity, motion, liquid level, soil moisture and door position sensors.
Suitable for
Temperature and humidity monitoring with DS18B20 or similar 1-Wire sensors
Light-based automation using LDR/photoresistor
Garage door or window position detection with reed-switch sensors
Liquid level sensing for aquariums or tanks
Soil moisture-based irrigation control
Motion-activated lighting with PIR sensors
Key specifications
Manufacturer: Shelly
Model / MPN: ALL\_SHELLY\_PLUS\_ADD-ON
EAN: 3800235266427
Dimensions: 37 × 42 × 15 mm (W × D × H)
Interface: 1-Wire plus analog and digital inputs
Compatibility: Works with Shelly Plus relays and most Arduino-compatible sensors
How to use
Connect the Shelly Plus Add-On to a Shelly Plus relay following the relay’s wiring diagram. Attach 1-Wire sensors such as DS18B20 to the 1-Wire terminals for temperature measurement, or connect analog/digital sensors (LDR, PIR, reed-switch, soil moisture, liquid level, wind or rain sensors) to the corresponding inputs. Configure sensor types and triggers in the Shelly Plus relay firmware or companion app to create automation scenes that respond to measured values.
Usage recommendations
The Shelly Plus Add-On is intended for built-in installations; for outdoor mounting ensure sensors and any exposed connections have appropriate weather protection. Use galvanic isolation to reduce electrical interference and follow recommended wiring lengths for 1-Wire sensors to maintain measurement accuracy.

## Specifications

| Feature | Value |
|---|---|
| Operating altitude | 0 - 2000 |
| Material | Plastic |
| Sensor type | Temperature sensor |
| Purpose | Indoor/outdoor |

### Features

| Feature | Value |
|---|---|
| Type | Built-in |
| Connectivity technology | Wired |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.105 kg |
| Height | 15 mm |
| Width | 37 mm |
| Depth | 42 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 30 - 70 |
| Operating temperature (T-T) | -20 - 40 |

## FAQ

### How much does the Shelly Plus Add-On built-in temperature sensor cost, and is it available for purchase?

The price is 14.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1757 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 01.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Shelly products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Shelly service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: connectivity technology, type, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/7771284/64374233_large.webp