Shelly Plus i4

Shelly Plus i4 – a smart 4-digital inputs controller with Wi-Fi and Bluetooth; allows manual activation of scenes or complex trigger scenarios, while functioning as a Wi-Fi extender and BLE gateway; fits behind wall switches.

Features

• Four digital inputs (SW1–SW4) via screw terminals
• Built-in Web UI for control and configuration
• ESP32 processor for ultra-fast response
• Connectivity: Wi-Fi 802.11 b/g/n and Bluetooth 4.2
• Works as Wi-Fi range extender and BLE gateway
• Multi-click support – up to 16 possible actions per button
• Schedules (up to 20), Webhooks (20 × 5 URLs each), scripting, and MQTT support
• Overheating protection
• Monochrome LED indicator for status (AP, Wi-Fi, cloud)

Primary Uses

• Scene activation or complex automation from button presses
• Control Shelly, HTTP, or MQTT-controlled devices via inputs
• Multi-click provides up to 16 distinct actions
• Compact installation behind existing buttons in tight spaces

Compatibility

• Works with Shelly ecosystem (Smart Control app, Cloud)
• No hub required
• Integrates with Alexa, Google Home, SmartThings through ecosystem
• Local control via Web UI, scripting, webhooks, and MQTT