# SHELLY Home Accessories DS18B20 Temperature Sensor Accessory for Temperature Add-on

**URL:** https://aio.lv/en/product--shelly-20245--4808515
**Data updated:** 2025-09-05 01:43 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Shelly
**Manufacturer code:** 20245
**EAN:** 3800235266076
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--shelly-20245--4808515

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Power supply range: 3.0v to 5.5vOutput lead:red (VCC), yellow(DATA) , black(GND)length:Approx.100 cmNo other components, unique single bus interfaceWidely applications: thermostatic controls, industrial systems, consumer products, thermometers, any thermally sensitive system, etc.

## Long description

Measure and control with precision
Shelly Plus Add-on is a galvanically isolated sensor interface for all Shelly Plus relays. Use it to measure temperature and humidity using its 1-Wire terminals, or connect various analog and digital sensors for complex automation and higher efficiency.

Highly compatible
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.

Garage door position 
You can connect a reed-switch sensor to Shelly Plus Addon's digital sensor and follow the state of your garage door. This way, you will always know whether it is open or closed when you're away and take appropriate action.

Always informed 
Using Shelly Plus Add-on and two DS18B20 sensors, you can easily measure the precise temperature inside your aquarium, as well as the room temperature. Based on this data, you can maintain a comfortable and healthy environment for your pets. Additionally, you can connect a liquid level sensor to the Add-on, and always be sure that the water level is at its optimal level.

Control your lights based on luminousity
Together with an LDR (photoresistor), Shelly Plus Add-on can trigger Shelly Plus 2PM to open the blinds when the room is too dark and it's still daytime. Additionally, when luminosity is low, Shelly Plus Add-on can trigger Shelly Plus 1 to turn on the lights at just the right time.

An awning that follows the weather
Outdoor motorized awnings offer pleasant shade for your guests on sunny days. However, a strong, unexcepted wind can damage them beyond repair. By combining it with a wind sensor connected to the Shelly Plus AddOn, Shelly Plus 2PM can automatically close the outside awning to protect them from the wind. Additionally, Shelly Plus Add-on with a rain sensor can trigger Shelly Plus 2PM to open the awning just in time to protect your guests.

Irrigation only when needed
Having a beautiful garden is not an easy task and automating your irrigation system can save you time and optimize your costs. Together with a soil moisture sensor, Shelly Plus Add-on can trigger Shelly Plus 1 to turn on the irrigation only when necessary, always skipping the rainy days.

Motion-controlled lights
Shelly Plus Add-on can also be connected to a PIR sensor to light up rooms that you occasionally use around the house. This way, when you enter the room, the light will come on for as long as you need it to.

## Specifications

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 42 x 15 x 37 |
| Weight | 0.105 kg |
| Power consumption (typical) | 0.5 W |
| Operating relative humidity (H-H) | 30 - 70 |
| Operating temperature (T-T) | -20 - 40 |
| Product colour | Black, Green |
| Housing material | Plastic |
| DC voltage range | 3.3 |

## FAQ

### How much does the Shelly Plus Add-On + 1xDS18B20 electrical relay 183276 cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3772 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 02.07.2026 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

## Image

https://aio.lv/img/cache/product/4808515/61820073_large.webp