Shelly Plus Add-on
Device identification
Device name: Shelly Plus Add-on
Short description
Shelly Plus Add-on (the Device) is a galvanically isolated sensor interface to the Shelly Plus and Gen3 devices.
Main applications
Residential
MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)
Light commercial (small office buildings, small retail/restaurant/gas station, etc.)
Agricultural (greenhouses, hotbed, nurseries, ranches, etc. )
Government/municipal
University/college
Future integrations
Google
Amazon
Samsung SmartThings
Device electrical interfaces
Inputs
1 analog input: ANALOG IN
1 digital input: DIGITAL IN
Output
1 reference voltage output: VREF OUT
1 reference voltage through a pull-up resistor output: VREF + R1 OUT
2 ground terminals: GND*
1-Wire interface
3 sensor power supply outputs (connected to the same PCB track): VCC
3 sensor data terminals (connected to the same PCB track): DATA
3 ground terminals: GND*
Connected to the same PCB ground layer.
Add-on interface
Shelly proprietary serial interface to connect to a Shelly Plus device
Supported sensors
Up to 5 DS18B20
Single DHT22
NTC resistors with 10 kΩ nominal resistance and β=4000 K
Photoresistors
PIR sensors
Soil moisture sensors
Ultrasonic proximity sensors
Capacitive liquid level sensors