Shelly i4 Gen 3

The Shelly i4 Gen 3 is a compact, Wi-Fi-powered smart input module with four independent channels. It lets you manually trigger pre-set scenes, activate synchronised actions, or create advanced trigger scenarios — all without switching the actual load.

Whether you’re integrating it into a smart home or commercial automation system, the i4 Gen 3 acts as a bridge between physical inputs and digital control.

Key Features:

• 4 input channels for switches, sensors, or contacts
• Scene activation without switching the load
• Wi-Fi connected – no hub required
• MQTT and HTTP/HTTPS support for advanced integrations
• Compact design – fits behind standard wall switches
• Improved processor and memory for faster performance
• Embedded web interface for local control and setup
• Remote access and monitoring via Shelly Cloud

Flexible Installation

Install the Shelly i4 Gen3 behind existing wall switches, inside electrical boxes, or in other tight spaces. It’s powered by AC and designed to retrofit easily into both residential and commercial environments.

Powerful Use Cases

• Manually trigger complex scenes (e.g. “Leaving Home” or “Close Shop”)
• Control other Shelly devices or MQTT/HTTP-controlled systems
• Use physical buttons or switches to interact with your automation setup
• Track input state changes in real time from anywhere

This product is ideal for users who need manual control of digital actions, without affecting power flow — perfect for scene control, multi-point automation triggers, or retrofit applications.