Shelly Plus Add-On — Isolated Sensor Module with DS18B20 Probe

Shelly Plus Add-On — Isolated Sensor Module with DS18B20 Probe

The Shelly Plus Add-On is a galvanically isolated sensor interface that connects directly to Shelly Plus, Gen3, and Gen4 relays. With the included DS18B20 probes, it accurately measures temperature and automates heating, air conditioning, or ventilation based on environmental data. No hub or subscriptions required.

Technical Specifications — Shelly Plus Add-On

• Power Supply: 3 V (from the Shelly relay it connects to)
• Consumption: < 0.5 W
• 1-Wire Sensors (DS18B20): Up to 5 probes simultaneously
• Analog Input: 0–10 V DC (source resistance < 10 kΩ)
• Digital Input: Yes
• Operating Temperature: −20°C to +40°C
• Certifications: CE, RoHS
• Compatible with: Shelly Plus 1, Plus 1PM, Plus 2PM, Plus UNI, Gen3, Gen4

Main Features

• Galvanic Isolation: Protects the relay and sensors from electrical interference.
• Up to 5 DS18B20 Probes: Measures temperature at multiple points simultaneously.
• 0-10V Analog Input: Compatible with most Arduino and market sensors.
• Temperature Control: Automatically activates or deactivates the relay based on the measured value.
• Native Integration: Direct configuration from the Shelly app and Home Assistant.

Compatible with

• Home Assistant (local, no cloud)
• Amazon Alexa
• Google Home
• Shelly App (HTTP REST API, MQTT)

Use Cases

• Heating control: activates the boiler when the temperature falls below the threshold.
• HVAC management: automates air conditioning based on ambient temperature.
• Temperature alarms: receives notifications if the temperature exceeds configurable limits.
• Monitoring in pools, greenhouses, wineries, and industrial environments.

Official Shelly distribution. Shipping from Spain. Official Shelly warranty.