Shelly Plus Add-On
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Shelly Plus Add-On

£15.99

3 in stock

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Overview

Shelly Plus Add-On is an expansion module for Shelly Plus devices that adds temperature, humidity, analog, and digital input capabilities. Powered directly from the connected Shelly Plus device, it supports up to five DS18B20 temperature sensors or one DHT22 temperature & humidity sensor, enabling advanced monitoring and automation scenarios. Designed for compact installations, Shelly Plus Add-On integrates seamlessly with Shelly Plus relays and input modules to extend sensing and control without additional power supplies.

Key features

  • Expansion add-on for Shelly Plus devices
  • Supports up to five DS18B20 temperature sensors
  • Supports one DHT22 temperature and humidity sensor
  • Provides one analog input and one digital input
  • Powered directly from the connected Shelly Plus device (3.3 V)
  • Enables advanced automation based on temperature, humidity, voltage, or analog values
  • Compact form factor for easy installation
  • Supports MQTT for integration with automation platforms

Product information

Use cases
  • Temperature Monitoring
  • Monitor temperature using up to five DS18B20 sensors for rooms, pipes, tanks, or equipment.
  • Temperature and Humidity Monitoring
  • Use a DHT22 sensor to track both temperature and humidity for climate-based automation.
  • Analog and Voltage Measurement
  • Read analog values or voltages to monitor sensors, probes, or external signals.
  • Advanced Automation Logic
  • Trigger automations in Home Assistant or other platforms based on sensor data via MQTT.
Technical specifications
Physical
Size (HxWxD)
37 × 42 × 15 mm (±0.5 mm)
Weight
105 g
Shell material
Plastic
Colour
Black
Environmental
Ambient temperature
-20°C to +40°C
Humidity
30% to 70% RH
Max altitude
2000 m
Electrical
Power supply voltage AC
N/A
Power supply voltage DC
3.3 V (from Shelly Plus device)
Power consumption
< 0.5 W (without sensors)
Output Circuit Ratings
VCC max current
10 mA
VREF OUT max current
1 mA
VREF + R1 OUT resistor
10 kΩ
Shelly Plus Device Firmware Capabilities
Supported devices
Shelly Plus 1, Shelly Plus 1PM, Shelly Plus 2PM, Shelly Plus i4, Shelly Plus i4DC
Temperature reading
Via DS18B20 or DHT22 sensors
Humidity reading
Via 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 than 5%
MQTT
Yes
CoAP
No
What’s included
  • Shelly Plus Add-On module

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