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Shelly PLUS sensor Add-On (for Shelly Plus series relays)

It’s an add-on accessory compatible with Shelly PLUS series relays, and enables you to add max 5 pieces of DS18B20 temperature sensors or other digital or analogue sensors to the Shelly Plus series relays.

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Factory SKU ID:
in stock (50+ pcs)

Shelly's PLUS sensor addon is compatible with Shelly PLUS series relays (Shelly PLUS 1, Shelly PLUS 1PM, Shelly PLUS 2PM) and PLUS i4 input module, and is making the smart devices capable of connecting to analogue and digital sensors.


  • It has an analog and a digital input
  • It can be used with up to five DS18B20 sensors or one DHT22 sensor.
  • DS18B20 - Temperature sensor (up to 5),
  • DHT22 sensor- if you want to monitor temperature and humidity


It measures 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:  When paired with a Shelly Plus 1, 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.

Control aquarium water heating: 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 a 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 a Shelly Plus 1 to turn on the lights at just the right time.

Follow the weather: Outdoor motorized awnings and shaders 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.

Product type:
sensor adapter for Shelly PLUS relays
Device power supply:
3, 3V DC (Shelly Plus relé biztosítja)
Operating temperature range:
-20℃ – 40℃
Operating humidity range:
30% - 70% RH
Max. power consumption:
less than 0.5 W (without sensors)
30 g/pcs
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Shelly PLUS sensor Add-On (for Shelly Plus series relays)
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