Shelly i4 Gen3
Device Identification
- Device name:
Shelly i4 Gen3 - Device model:
S3SN-0024X - Device SSID:
ShellyI4G3-XXXXXXXXXXXX - BLE Model ID:
0x1812
Short Description
The Shelly i4 Gen3 is a smart Wi-Fi switch input that allows you to manually activate or deactivate any created scene, run synchronized actions, or execute complex trigger scenarios. You can use it to control other connected Shelly switches, sensors, or HTTP and MQTT-controlled devices.
Small enough to fit behind every wall switch, the Shelly i4 Gen3 can show the status and control the action of four inputs. It features an improved processor and increased memory compared to its predecessor.
You can access and monitor the device remotely from any location with internet connectivity, provided it's connected to a Wi-Fi router and the Internet.
It can be retrofitted into standard electrical wall boxes, behind power sockets, light switches, or in other compact spaces.
The device includes an embedded Web Interface for setup and control.
Main Features
- Wi-Fi Connectivity: Connects to your home Wi-Fi network, enabling remote monitoring of humidity and temperature data via smartphone app or compatible devices.
- Integration with Alexa: Supports voice control and automation through Amazon Alexa.
- Local and Cloud Control: Functions independently on a local Wi-Fi network and can also be operated via cloud-based home automation services.
- Bluetooth Connectivity: Includes Bluetooth and BLE gateway support for setup and device inclusion.
- User-Friendly Interface: Equipped with a reset button for manual interactions.
- Improved Processor and Memory: Upgraded hardware for enhanced performance.
- Embedded Web Interface: Built-in web interface for monitoring, control, and configuration.
- Wireless Connectivity: Supports Wi-Fi (802.11 b/g/n) and Bluetooth 4.2 with specified indoor/outdoor range capabilities.
- BLE Gateway: Acts as a bridge between Shelly BLU devices and the broader Shelly ecosystem, forwarding Bluetooth signals to the cloud or local non-BLE devices.
- Wi-Fi Range Extender for IoT Devices: Extends Wi-Fi coverage by receiving, boosting, and retransmitting the signal over a wider area.
- Scripting: Shelly Script Language Features
- Wide Range of Integrations: Compatible with third-party home systems via documented HTTP API, MQTT(s), Web Hooks (HTTP/HTTPS), and UDP.
- Virtual Components: Virtual Dynamic Components Documentation
Use Cases
- Remote Appliance Control: Turn on/off electric appliances remotely using your mobile phone, tablet, PC, or home automation system.
- Internet-Connected Convenience: Access and control devices from anywhere with internet connectivity, as long as the Shelly i4 Gen3 is connected to a Wi-Fi router.
- Home Automation: Enables automatic control of power appliances for a more convenient and enjoyable experience.
Main Applications
- Residential
- MDU (Multi Dwelling Units – apartments, condominiums, hotels, etc.)
- Light Commercial (small offices, retail stores, restaurants, gas stations, etc.)
- Government/Municipal
- University/College
Integrations
Amazon Alexa Supported Capabilities
Yes – through a virtual device routine
Google Smart Home Supported Traits
No
Samsung SmartThings Supported Capabilities
No
Simplified Internal Schematics
N/A for this device.
Device Electrical Interfaces
Inputs
- 4 switch/button inputs on screw terminals: SW1, SW2, SW3, SW4
- 3 power supply inputs on screw terminals: 1 N and 2 L
Outputs
N/A
Add-on Interface
- Shelly proprietary serial interface
⚠ CAUTION! High voltage is present on the add-on interface when the device is powered.
Connectivity
- Wi-Fi
- Bluetooth
Safety Function
- Overheating protection
User Interface
Inputs
- One (Control) button
- Press and hold for 5 seconds: Enables Device Access Point and Bluetooth connection.
- Press and hold for 10 seconds: Performs factory reset.
Outputs
- LED (monocolor) indication:
- AP enabled, Wi-Fi disabled: 1 sec ON / 1 sec OFF
- Wi-Fi enabled but not connected: 1 sec ON / 3 sec OFF
- Connected to Wi-Fi network: Constantly ON
- Cloud enabled but not connected: 1 sec ON / 5 sec OFF
- Connected to Shelly Cloud: Constantly ON
- OTA (Over-the-Air Update): ½ sec ON / ½ sec OFF
- Button pressed and held for 5 seconds: ½ sec ON / ½ sec OFF
- Button pressed and held for 10 seconds: ¼ sec ON / ¼ sec OFF
Note: The list starts with the initial device status and lowest priority. Each subsequent state cancels the previous one.
Specifications
| Quantity | Value |
|---|---|
| Physical | |
| Size (H×W×D) | 37×42×16 mm / 1.46×1.65×0.63 in |
| Weight | 19 g / 0.67 oz |
| Screw terminals max torque | 0.4 Nm / 3.5 lbin |
| Conductor cross section | 0.5 to 4 mm² / 20 to 11 AWG (solid, stranded, and bootlace ferrules) |
| Conductor stripped length | 6 to 7 mm / 0.24 to 0.28 in |
| Mounting | Wall box |
| Shell material | Plastic |
| Shell color | Orange |
| Terminal Color | Black |
| Environmental | |
| Ambient working temperature | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity | 30 % to 70 % RH |
| Max. altitude | 2000 m / 6562 ft |
| Electrical | |
| Power supply | 110 - 240 V~ 50/60 Hz |
| Power consumption | < 1 W |
| Sensors, meters | |
| Internal temperature sensor | Yes |
| Radio | |
| Wi-Fi Protocol | 802.11 b/g/n |
| RF band | 2401 - 2483 MHz |
| Max. RF power | < 20 dBm |
| Range | Up to 30 m / 100 ft indoors, 50 m / 160 ft outdoors (Depends on local conditions) |
| Bluetooth | |
| Protocol | 4.2 with BLE |
| RF band | 2400 - 2483.5 MHz |
| Max. RF power | < 4 dBm |
| Range | Up to 10 m / 33 ft indoors, 30 m / 100 ft outdoors (Depends on local conditions) |
| Microcontroller unit | |
| CPU | ESP-Shelly-C38F |
| Flash | 8 MB |
| Firmware capabilities | |
| Webhooks (URL actions) | 20 with 5 URLs per hook |
| Scripting | Yes |
| MQTT | Yes |
Basic Wiring Diagrams
| 
| 
|
Legend
| Terminals | Description | Wires | Description |
|---|---|---|---|
| SW1, SW2, SW3, SW4 | Switch/button input terminals | L | Live wire (110–240 V~) |
| L | Live terminal (110–240 V~) | N | Neutral wire |
| N | Neutral terminal |
Shelly Smart Control
Shelly Web User Interface
Components and APIs
Compliance
- Shelly i4 Gen3 multilingual EU Declaration of Conformity (212)
- Shelly i4 Gen3 AU/NZ Certificate for Suitability
- Shelly i4 Gen3 UK PSTI ACT Statement of Compliance
Compliance Archive
- Shelly i4 Gen3 multilingual EU Declaration of Conformity (144)
- Shelly i4 Gen3 multilingual EU Declaration of Conformity (50)
Printed User Guide
Additional Language Versions
Installation Guides
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