Shelly i4 Gen3
Shelly i4 Gen3 - Image 2
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Shelly i4 Gen3

£12.99

2 in stock

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Overview

Shelly i4 Gen3 is a Wi-Fi-operated 4-digital-input controller designed for triggering scenes, automations, and complex actions without switching a load. It allows standard wall switches or buttons to control Shelly devices, HTTP/MQTT endpoints, and automation platforms, making it ideal for advanced control logic behind existing switches.

Powered by the Gen3 Shelly ESP processor (ESP-Shelly-C38F) with 8 MB memory, Shelly i4 Gen3 delivers fast response times, improved reliability, and expanded integration support, while fitting neatly behind standard wall switches or control panels.

Key features

  • 4 digital inputs for scene and automation triggering
  • Supports up to 16 actions via multi-click (short, long, double, etc.)
  • Wi-Fi operated – no hub required
  • Gen3 ESP processor (ESP-Shelly-C38F) with 8 MB memory
  • Immediate execution of actions and notifications
  • Works with Shelly relays, sensors, scenes, and third-party systems
  • Supports scripting (mJS), webhooks, MQTT, WebSocket, HTTPS, UDP, TLS
  • Acts as a Wi-Fi range extender and Bluetooth gateway
  • Bluetooth for fast onboarding and device inclusion
  • Supports KNXnet/IP communication
  • Compatible with Shelly Smart Control app, Home Assistant, Alexa, and other platforms

Product information

Use cases
  • Smart Wall Switch Scene Controller
  • Use existing switches or push-buttons to trigger scenes, automations, or device groups without rewiring circuits.
  • Automation Trigger Interface
  • Send commands to HTTP, MQTT, or automation systems based on button presses and multi-click actions.
  • Multi-Control Panel
  • Create advanced wall-mounted control panels for lighting scenes, blinds, heating, or smart home routines.
Technical specifications
Power
Power Supply
110–240 V AC ±10%, 50/60 Hz
Device Power Consumption
< 1 W
Inputs & Control
Channels
4 digital inputs
Multi-Click Support
Up to 16 possible actions
Custom Scripts (mJS)
Yes
Device Temperature Protection
Yes
Connectivity
Wi-Fi Protocol
802.11 b/g/n (2.4 GHz)
Wi-Fi Radio Signal Power
1 mW
Wi-Fi Range
Up to 50 m outdoors, up to 30 m indoors
Bluetooth
Yes
Bluetooth Protocol
4.2
Bluetooth Range
Up to 30 m outdoors, up to 10 m indoors
Environmental
Operating Temperature
−20 °C to 40 °C
Physical
Dimensions
37 × 42 × 16 mm
What’s included
  • Shelly i4 Gen3
  • Quick start guide

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