Description
The Shelly i4 Gen3 is a compact smart input module that allows you to transform up to four physical switches or push buttons into powerful triggers for your smart home. Instead of directly switching power, you use the i4 Gen3 to scenes, automations, and actions within the Shelly ecosystem or other home automation platforms.
Thanks to the improved processor and additional memory compared to previous generations, the Shelly i4 Gen3 is faster, more stable and suitable for more complex automation scenarios.
From push button to smart scene
With the Shelly i4 Gen3 you decide what a button does:
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one click, double click or long press
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activate or deactivate scenes
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perform multiple actions simultaneously
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send triggers via HTTP, MQTT or webhooks
For example, one push button can control lighting, shutters, heating and music simultaneously.
Compact and easy to install
Thanks to its small size, the Shelly i4 Gen3 is easy to install:
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behind existing wall switches
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in standard flush-mounted boxes
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behind electrical sockets
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in other places with limited space
The module has a built-in web interface that allows you to configure and monitor everything locally, without any additional software.
Smart, local and cloud-based
The Shelly i4 Gen3 works:
In addition, it supports Bluetooth , which ensures fast provisioning and extra flexibility within your smart home.
Additional features for advanced installations
In addition to input functionality, the Shelly i4 Gen3 also functions as:
For advanced users, ShellyScript , virtual components, and extensive API integrations are available.
Key Features
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Smart 4-channel input module
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Activates scenes and automations
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No direct load switching (trigger function)
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Wi-Fi & Bluetooth support
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Improved processor and extra memory
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Local and cloud control
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Built-in web interface
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BLE Gateway for Shelly BLU
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Wi-Fi booster for Shelly IoT
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Support for:
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ShellyScript
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HTTP / HTTPS
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MQTT(s)
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Webhooks
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UDP
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Integration with Google Assistant, Alexa and SmartThings
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Virtual components
Technical specifications
| Characteristic |
Specification |
| Model |
Shelly i4 Gen3 |
| Number of inputs |
4 |
| Function |
Scene and trigger input |
| CPU |
ESP-Shelly-C38F |
| Power supply |
110–240 V AC, 50/60 Hz |
| Connectivity |
Wi-Fi 802.11 b/g/n, Bluetooth 4.2 (BLE) |
| Energy consumption |
< 1 W |
| Temperature sensor |
Yes |
| Assembly |
Built-in |
Applications
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Smart scenes and automation
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Central push buttons for multiple actions
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Home automation projects
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Professional smart home installations
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Integration with external systems via API or MQTT
