Shelly Plus Add-On


In stock

Shelly Plus Add-on is a galvanically isolated sensor interface designed for Shelly Plus devices. Use it to connect various sensors for temperature, humidity monitoring, and more.

Key Features:

  • Compatible with Shelly Plus devices
  • Supports up to five DS18B20 temperature sensors or one DHT22 sensor
  • Analog and digital input for versatile sensor connectivity
  • Galvanically isolated sensor interface for enhanced safety
  • Wide range of applications, including temperature, humidity, light control, and more
  • Compatible with most Arduino sensors
  • Easily integrate with existing smart home automation systems

This product is approved for use in Australia but must be installed by a licensed electrician.


In stock

$35.98 for 2 item(s)

The Shelly Plus Add-on is a highly compatible and versatile sensor interface that works seamlessly with Shelly Plus devices. With support for up to five DS18B20 sensors or one DHT22 sensor, the Add-on allows for precise temperature and humidity measurements. It also features an analog and digital input, making it perfect for a wide range of applications such as garage door position monitoring, water heating management, light control based on luminosity, and more. Enhance your smart home experience with the Shelly Plus Add-on and enjoy endless automation possibilities.

Shelly Plus Add-On Use Cases:

Garage door position monitoring:

Connect a reed-switch sensor to the digital input and track the state of your garage door, knowing whether it’s open or closed when you’re away.

Aquarium temperature and water level monitoring:

With two DS18B20 sensors, you can measure the temperature inside your aquarium and the room temperature. You can also connect a liquid level sensor to ensure optimal water levels.

Light control based on luminosity:

Using an LDR (photoresistor) and the Shelly Plus Add-on, control your lights based on the room’s brightness.

Weather-responsive awning control:

Combine the Shelly Plus Add-on with a wind sensor to automatically close outdoor awnings in strong winds, or with a rain sensor to open the awning just in time to protect your guests.

Smart irrigation:

Use a soil moisture sensor with the Shelly Plus Add-on to control your irrigation system based on actual soil moisture levels, saving time and optimizing costs.

Motion-controlled lights:

Connect a PIR sensor to the Shelly Plus Add-on to automate lighting in rooms that are occasionally used, turning lights on only when someone is in the room.

SKU: SH-SHELLYADDON Categories: , Tags: ,

Smart Home Solution

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Technical Specifications

Size (HxWxD): 37x42x15 ±0.5 mm / 1.46 x 1.65 x 0.59 ±0.02 in
Weigh: 105 g / 3.70 oz
Shell material: Plastic
Screw terminals max torque: 0.1 Nm / 0.89 lbIn
Conductor cross section: max. 1 mm² / 17 AWG
Conductor stripped length: 4.5 mm / 0.18 in
Color: Black
Ambient temperature: -20 °C to 40 °C / -5 °F to 105 °F
Humidity 30 % to 70 % RH
Max. altitude 2000 m / 6562 ft
Power supply voltage AC: N/A
Power supply voltage DC: 3.3 V (from Shelly plus device)
Power consumption: < 0.5 W (without sensors)
VCC max. current: 10 mA
VREF OUT max. current: 1 mA
VREF+R1 OUT resistor 10 k?
Shelly Plus Addon supporting devices: “Shelly Plus 1/1PM , Shelly Plus 2PM, Shelly Plus i4/i4DC”
Temperature reading: Depends on the DS18B20 or DHT22 sensors
Humidity reading: Depends on the DHT22 sensor
Digital input: -15 V to 0.5 V (True) / 2.5 V to 15 V (False)*
Analog input range: 0 to 100%
Analog input report threshold: 1%**
Voltmeter range: 0 to 10 V
Voltmeter report threshold: 0.1 V**
Analog input / Voltmeter accuracy Better that 5%
CoAP: No