Short description
Transform your Shelly Pro device into a powerful sensor hub with the Shelly Pro Sensor Add-on. This galvanically isolated interface lets you connect multiple sensor types for real-time monitoring and advanced automation in any environment - residential, commercial, or industrial.
It provides two 1-Wire interfaces, two analog inputs (0-10V), two digital inputs (±15V), and a potential-free solid-state relay output, giving you maximum flexibility to build customized, intelligent solutions.
Compatible with most Arduino sensors, the Shelly Pro Sensor Add-on opens the door to limitless applications.
Main features
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Expands functionality of selected Shelly Pro devices with additional sensor connectivity.
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Galvanically isolated for safe and reliable operation.
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Supports multiple sensor types for advanced automation.
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2× DATA (1-wire data terminals) – connect up to five DS18B20 temperature sensors, one DHT22 for temperature and humidity, or other 1-Wire devices.
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2× Analog inputs (0-10V) – suitable for sensors such as CO₂, pressure, light, or other analog types.
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2× Digital inputs (±15V) – for motion detectors, leak sensors, switches, and more.
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1× Potential-free solid-state relay input – ideal for relays, alarms, or other external circuits.
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Compatible with most Arduino sensors for custom projects.
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Ideal for DIN rail installations in residential, commercial, and industrial environments.
Use cases
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Monitor and Control Critical Conditions
Install the Shelly Pro Add-on in your DIN-mounted setup to track temperature, humidity, open doors/windows, or other key data directly from the electrical panel. -
Optimize HVAC and Energy Use
Connect temperature, humidity, and other sensors to fine-tune heating, cooling, and ventilation for maximum comfort and efficiency. -
Automate Lighting with Motion Detection
Use a PIR sensor to turn lights on only when a room is occupied - ideal for hallways, storage areas, or office spaces. -
Protect Against Leaks and Weather
Integrate water leak, rain, or wind sensors to safeguard your property and automatically react to environmental changes. -
Smart Irrigation and Outdoor Control
Pair with a soil moisture sensor to water only when needed, or automate awnings and blinds for weather protection and comfort. -
Custom Projects and Specialized Monitoring
Leverage compatibility with Arduino sensors to build unique solutions for homes, aquariums, or industrial applications.
Main applications
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Residential
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MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)…
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Light commercial (small office buildings, small retail/restaurant/gas station, etc.)…
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Government/municipal
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University/college
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Farming
Integrations
Amazon Alexa supported capabilities
N/A
Google Smart Home supported traits
N/A
Samsung SmartThings supported capabilities
N/A
Device electrical interfaces
Inputs
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2x Analogue inputs (0-10 V)
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2x Digital inputs (±15 V)
Outputs
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1x Potential-free solid-state relay output
1-wire terminals
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2x DATA (independent)
Power / Reference
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2x GND
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1x VREF
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1x VREF + R1
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1x VCC
Add-on interface
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Shelly proprietary serial interface to connect to a Shelly Pro device
Supported Sensors
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Up to 5x DS18B20 temperature sensors per channel.
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DHT22 temperature and humidity sensors.
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NTC resistors with 10 kΩ nominal resistance and β=4000 K
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Photoresistors
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PIR sensors
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Soil moisture sensors
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Ultrasonic proximity sensors
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Capacitive liquid level sensors
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Sound detectors
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Other analog sensors with 0 to 10 V output voltage
Specifications
| Quantity | Value |
|---|---|
| Physical | |
| Size (HxWxD): | 94x19x69 / 3.70x0.75x2.71 |
| Weight: | 45 g / 1.59 oz |
| Mounting: | DIN Rail |
| Conductor cross section: | 0.2 to 0.5 mm² / 24 to 20 AWG |
| Conductor stripped length: | 5 to 8 mm / 0.20 to 0.31 in |
| Shell material: | Plastic |
| Shell color: | Black |
| Connectors color: | Black |
| Environmental | |
| Ambient working temperature: | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity: | 30% to 70% RH |
| Max. altitude: | 2000 m / 6562 ft |
| Electrical | |
| Power supply: | 12 V (from compatible Shelly device) |
| Power consumption: | < 0.5 W (without sensors) |
| 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% |
| Output circuits ratings | |
| VCC max. current: | 10 mA |
| VREF max. current: | 2 mA |
| VREF+R1 resistor | 10 kΩ |
| Max switching voltage: | 30 V |
| Max switching current: | 300 mA |
| Microcontroller unit | |
| CPU: | STM32G071GBU6 |
| Compatible devices: |
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| Others | |
| Temperature reading accuracy: | Depends on the DS18B20 or DHT22 sensors |
| Humidity reading accuracy: | Depends on the DHT22 sensor |
*Logic can be inverted in the digital input settings
** Can be configured in the analog input / voltmeter settings
Basic wiring diagrams
Compliance and certification
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Shelly Pro Sensor Add-on multilingual EU declaration of conformity 289 2026-04-28.pdf
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Shelly Pro Sensor Add-on UK PSTI ACT statement of compliance 289 2026-04-28.pdf
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Shelly Pro Sensor Add-on UKCA declaration of conformity 289 2026-04-28.pdf
API and components
All Shelly devices and services
Printed user guide
Cable Manager - 3D Print File
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Download here: Shelly_ProSensorAddon_Cablemanager.STL
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Discussion topic: https://community.shelly.cloud/topic/14408-pro-sensor-add-on-cable-manager-kabelmanager/
