Shelly
Shelly Plus Add-On
Shelly Plus Add-On
Couldn't load pickup availability
- We use Australia Post Carbon Neutral Shipping: 2-5 Days $9.99, 1-3 Days $15 or StarTrack Premium $20
- Order before Midday and we Dispatch the same day
- Found a Cheaper Price we will Match it
Shelly Plus Add-on: Galvanically Isolated Sensor Interface
The Shelly Plus Add-on is a galvanically isolated sensor interface designed for seamless integration with Shelly Plus and Gen3 devices. It expands the functionality of Shelly controllers by adding analog, digital, and 1-Wire sensor support — ideal for applications that require precise environmental, proximity, or motion sensing.
Main Applications
- Residential
- MDU (Multi-Dwelling Units – apartments, condominiums, hotels, etc.)
- Light commercial (small offices, retail stores, restaurants, gas stations, etc.)
- Agricultural (greenhouses, nurseries, farms, ranches, etc.)
- Government/municipal buildings
- Universities and educational institutions
Future Integrations
- Amazon
- Samsung SmartThings
Device Electrical Interfaces
Inputs
- 1 analog input: ANALOG IN
- 1 digital input: DIGITAL IN
Outputs
- 1 reference voltage output: VREF OUT
- 1 reference voltage with pull-up resistor: VREF + R1 OUT
- 2 ground terminals: GND*
1-Wire Interface
- 3 sensor power outputs (shared PCB track): VCC
- 3 sensor data terminals (shared PCB track): DATA
- 3 ground terminals (shared PCB ground): GND*
Add-on Interface
- Shelly proprietary serial interface for connecting to compatible Shelly Plus devices
Supported Sensors
- Up to 5x DS18B20 temperature sensors
- Single DHT22 temperature and humidity sensor
- NTC resistors with 10 kΩ nominal resistance, β=4000 K
- Photoresistors
- PIR (motion) sensors
- Soil moisture sensors
- Ultrasonic proximity sensors
- Capacitive liquid level sensors
- Sound detectors
- Other analog sensors with 0–10 V output voltage
Specifications
| Size (HxWxD): | 37x42x15 ±0.5 mm / 1.46 x 1.65 x 0.59 ±0.02 in |
| Weight: | 105 g / 3.70 oz |
| Shell Material: | Plastic |
| Color: | Black |
| Max Torque (Screw Terminals): | 0.1 Nm / 0.89 lb·in |
| Max Conductor Size: | 1 mm² / 17 AWG |
| Conductor Stripped Length: | 4.5 mm / 0.18 in |
| Ambient Temperature: | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity: | 30% to 70% RH |
| Max Altitude: | 2000 m / 6562 ft |
| 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 |
| VREF + R1 OUT Resistor: | 10 kΩ |
Supported Shelly Devices
Shelly Plus Devices
- Shelly Plus 1 / 1PM / 1 UL / 1PM UL
- Shelly Plus 2PM / 2PM UL
- Shelly Plus i4 / i4DC
- Shelly Plus 0-10V Dimmer PM
- Shelly Plus RGBW PM
Shelly Gen3 Devices
- Shelly 1 Gen3 / 1PM Gen3 / 2PM Gen3
- Shelly Shutter / i4 Gen3
- Shelly DALI Dimmer Gen3
- Shelly Dimmer 0/1-10V PM Gen3
- Shelly EM Gen3
Shelly Gen4 Devices
- Shelly 1 Gen4 / 1PM Gen4 / 2PM Gen4
Measurement Capabilities
| Temperature Reading: | Depends on DS18B20 or DHT22 sensors |
| Humidity Reading: | Depends on 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** |
| Accuracy: | Better than ±5% |
* Logic can be inverted in digital input settings.
** Thresholds can be configured in analog input/voltmeter settings.
Legend
| VCC: | Sensor power supply terminals |
| DATA: | 1-Wire data terminals |
| GND: | Ground terminals |
| ANALOG IN: | Analog input |
| DIGITAL IN: | Digital input |
| VREF OUT: | Reference voltage output |
| VREF + R1 OUT: | Reference voltage through pull-up resistor (for passive devices) |
The Shelly Plus Add-on is a powerful expansion module that transforms your Shelly Plus or Gen3 devices into multi-sensor automation hubs, enabling smarter control, monitoring, and environmental awareness in residential, commercial, or agricultural applications.
Customer Reviews
This is a must have for anyone needing extra data or sensors. Super simple setup once you have read the documentation. I wish I had more data to collect.
I am still waiting to receive the items.
Hello Joseph, As you can see from this dispatch email and the tracking number this was shipped the same day. We are located in Australia you are in Ireland so understandably it will take a few day. I can see it landed in Ireland 6 days ago. Please follow up with your local post office using the tracking number provided. You can also contact us via email or live chat on the website rather than reviewing products. support@ozsmartthings.com.au
I used the Shelly Plus Add-On along with the Shelly Plus 1. In total four were used in a commercial project where a grocery store need to monitor and send email alerts for 7 fridges, freezers including a walk-in-fridge & freezer. The system works very very well. Would recommend highly for especially in this type of installation. I'm happy to give free advice to anyone with setup questions.
Shelly Plus Add-On