Description
The Shelly Plus Add-on is a smart expansion module designed to add advanced monitoring and automation features to Shelly devices from the Plus, Gen3 and Gen4 series.
It allows the connection of a wide range of analogue and digital sensors, transforming a simple relay or controller into a complete monitoring system for temperature, humidity, light, motion or liquid level.
Thanks to its galvanic isolation and extensive compatibility, the Shelly Plus Add-on is ideal for complex smart home projects, industrial automation or agricultural applications.
Key features
- Expansion module for Shelly Plus / Gen3 / Gen4 devices
- Support for analogue and digital sensors
-
1-Wire interface for temperature sensors
- Galvanic isolation for safety
- Compatible with up to 5 DS18B20 sensors
- Support for DHT22 (temperature + humidity)
- Full integration into the Shelly ecosystem
- Ideal for advanced automation
Features and benefits
? Extends the functionality of Shelly devices – add additional sensors and turn relays into smart monitoring systems.
? Comprehensive environmental monitoring
You can measure:
- temperature
- humidity
- light
- liquid level
- motion
- noise
? Ideal for complex automation
Perfect for advanced scenarios:
- greenhouse control
- HVAC automation
- irrigation control
- industrial monitoring
? Extensive compatibility – Works with most modern Shelly devices.
Compatible sensors
- DS18B20 (up to 5 sensors)
- DHT22 (temperature + humidity)
- NTC resistors
- Photoresistors
- PIR sensors
- Soil moisture sensors
- Liquid level sensors
- Ultrasonic sensors
- 0–10V analogue sensors
Applications
- Greenhouse and agricultural automation
- Temperature and humidity monitoring
- HVAC system control
- Liquid level monitoring
- Advanced smart home
- Industrial applications
| General information |
| Model |
Shelly Plus Add-on |
| Product type |
Sensor extension module |
| Compatibility |
Shelly Plus / Gen3 / Gen4 |
| Dimensions |
| Dimensions |
37 x 42 x 15 mm |
| Weight |
105 g |
| Interfaces |
| Analogue input |
1 |
| Digital input |
1 |
| 1-Wire interface |
Yes |
| Outputs |
| VREF OUT |
Yes |
| VREF + R1 OUT |
Yes |
| VCC sensor supply |
Yes |
| Power supply |
| Supply voltage |
3.3V (from the Shelly device) |
| Power consumption |
< 0.5W |
| Capabilities |
| DS18B20 sensors |
up to 5 |
| DHT22 |
1 |
| Analogue input |
0 – 10V |
| Device compatibility |
| Compatible series |
Shelly Plus, Gen3, Gen4 |
| Operating conditions |
| Temperature |
-20°C to +40°C |
| Humidity |
30% - 70% RH |
