Shelly Plus Add-On Sensor Interface

Shelly Plus Add-On – Versatile Sensor Interface for Advanced Smart Automation

The Shelly Plus Add-On Sensor Interface transforms your smart automation setup by connecting a wide variety of analog and digital Arduino-compatible sensors. Designed to work with Shelly Plus relays, this galvanically isolated module provides stable and accurate sensor readings, enabling the creation of powerful, condition-based automation scenes.

Whether monitoring garage door positions, water heater status, luminosity, weather conditions, or motion, the Shelly Plus Add-On supports diverse control scenarios. It even enables efficient irrigation scheduling and temperature tracking with supported sensors like DS18B20 and DHT22. Easily integrate with Alexa, Google Home, Android, and iOS platforms for voice-controlled smart home management.

Key Features

• Compatible with most Arduino sensors
• Galvanic isolation for stable sensor integration
• Supports both analog and digital inputs
• 1-Wire interface included for simple sensor connectivity
• Enables automation such as:
• Garage door status tracking
• Water heating monitoring
• Luminosity-based light control
• Weather-responsive awning control
• Sensor-based irrigation activation
• Motion-triggered lighting
• Works with Alexa, Google Home, Android, and iOS
• Pairs with Shelly Plus 1/1PM, 2PM, i4/i4DC relay devices

Technical Specifications

Physical Properties

• Dimensions (HxWxD): 37 × 42 × 15 ±0.5 mm / 1.46 × 1.65 × 0.59 ±0.02 in
• Weight: 105 g / 3.70 oz
• Material: Plastic
• Color: Black

Environmental Conditions

• Operating Temperature: –20 °C to 40 °C (–5 °F to 105 °F)
• Humidity Range: 30% to 70% RH
• Maximum Operating Altitude: 2000 m / 6562 ft

Electrical Specifications

• Power Supply: 3.3 V DC (from Shelly Plus device)
• Power Consumption: < 0.5 W (without sensors)
• VCC Max Current: 10 mA
• VREF OUT Max Current: 1 mA

Sensor & Input Capabilities

• Supported Devices: Shelly Plus 1/1PM, 2PM, i4/i4DC
• Temperature Sensor Support: DS18B20, DHT22
• Humidity Sensor Support: DHT22
• Digital Input Range:
• True: –15 V to 0.5 V
• False: 2.5 V to 15 V
• Analog Input Range: 0 to 100%
• Reporting Threshold: 1%
• Voltmeter Range: 0 to 10 V
• Reporting Threshold: 0.1 V
• Accuracy: Better than 5%