Shelly 1 Gen4 UL-Certified 2-pack

Device identification

• Device name: Shelly 1 Gen4

• Device model: S4SW-001X16EU

• Device SSID: Shelly1G4-XXXXXXXXXXXX

• Device Bluetooth ID: 0x1028

Short description

Shelly 1 Gen4 is a small form factor smart switch with potential-free contacts, which allows remote control of electric appliances through a mobile phone, tablet, PC, or home automation system. It can work standalone in a local Wi-Fi network or it can also be operated through cloud home automation services.

Shelly 1 Gen4 can be accessed, controlled and monitored remotely from any place where the User has internet connectivity, as long as the device is connected to a Wi-Fi router and the Internet.

It can be retrofitted into standard electrical wall boxes, behind power sockets and light switches or other places with limited space.

Shelly 1 Gen4 has embedded Web Interface, which can be used to monitor and control the device, as well as adjust its settings.

The device has multi-protocol wireless MCU which provides Zigbee and Bluetooth connectivity, ensuring a secure connection.

This device is compatible with Matter.

Main features

• Wi-Fi Connectivity: The device can connect to your home Wi-Fi network, allowing you to remotely monitor humidity and temperature data through a smartphone app or other compatible devices.

• Integration with Smart Home Platforms: You can integrate the Shelly 1 Gen4 with popular smart home platforms, including Google, Alexa, and Samsung SmartThings. This enables voice control and automation capabilities through these platforms.

• Local and Cloud Control: Can function independently in a local Wi-Fi network and can also be operated through cloud home automation services.

• Bluetooth Connectivity: Bluetooth and BLE gateways are available for inclusion purposes, which may be useful during the setup process.

• Zigbee Connectivity: Zigbee is available for inclusion purposes, which may be useful during the setup process.

• User-Friendly Interface: The device provides a user-friendly interface with a reset button for manual interactions.

• Improved Processor: Upgraded with an improved processor and support for Zigbee connectivity.

• Embedded Web Interface: Features an embedded web interface for monitoring, control, and adjustment of settings.

• Wireless Connectivity: The device supports Wi-Fi (802.11 b/g/n/ax) and Bluetooth 5.0 protocols with specified indoor and outdoor range capabilities.

• Dry Contact: Allows switching on and off of lower voltage devices.

• BLE Gateway: Bridge between your Shelly BLU devices and the wider Shelly ecosystem. It receives Bluetooth signals and sends them to the cloud or locally to another non-Bluetooth device.

• Wi-Fi Range extender for IoT devices: A Wi-Fi extender is employed to expand the reach of your Wi-Fi network by receiving your current Wi-Fi signal, enhancing its strength, and then transmitting the enhanced signal over a wider area.

• Zigbee Range extender for IoT devices: A Zigbee extender is employed to expand the reach of your Zigbee network by receiving your Zigbee signal, enhancing its strength, and then transmitting the enhanced signal over a wider area.

• Scripting: https://shelly-api-docs.shelly.cloud/gen2/ComponentsAndServices/Script

• Wide range of integrations: The device can be integrated with 3rd party home systems, documented HTTP API, MQTT(s), Web Hooks over HTTP and HTTPS, UDP

• Schedules: Allows scheduling of complex operations to be executed in predefined time window. Users can specify time windows based on date, time of day, weekdays, hours, minutes and seconds.

• Virtual Components: https://shelly-api-docs.shelly.cloud/gen2/DynamicComponents/Virtual/

• KNX net/IP support: https://shelly-api-docs.shelly.cloud/gen2/Integrations/KNX/

Use cases

• Remote Appliance Control: Turn on or off electric appliances remotely using your mobile phone, tablet, PC, or home automation system.

• Internet-Connected Convenience: Access аnd control devices from anywhere with internet connectivity, as long as the Shelly 1 Gen4 is connected to a Wi-Fi router.

• Home Automation: Shelly 1 Gen4 enables automatic control of power appliances for more relaxing and enjoyable experience.

Home Automation Use Cases

Light Control

• Remote control of standard lights (LED, incandescent, halogen).

• Set timers or schedules for lights (e.g., porch lights on at sunset).

• Use with motion sensors (for example Shelly BLU Motion) for occupancy-based lighting.

Garage Door Automation

• Act as a smart trigger to open/close garage doors.

• Monitor door status with a sensor input i.e using Shelly Plus Add-on.

• Integrate with voice assistants for hands-free control.

Fan or Ventilation Control

• Automate bathroom or kitchen fans based on humidity sensors (like Shelly BLU H&T).

• Turn on ventilation during specific times of day or based on occupancy.

Heater or Towel Rail Switching

• Control electric towel warmers or heaters (Max. switching current: 16A).

• Schedule operation or link to temperature thresholds via sensors (like Shelly BLU H&T).

Commercial Applications

Lighting Automation in Small Offices or Shops

• Control light zones based on business hours.

• Use with motion detectors (for example Shelly BLU Motion) for energy savings.

Meeting Room Occupancy

• Enable or disable equipment like projectors depending on occupancy.

Security and Access Systems

• Remotely unlock gates or doors for deliveries.

• Monitor open/close state of access points.

Industrial/Utility Use Cases

Equipment Monitoring & Control

• Power cycling routers, modems, or network switches.

Pump or Motor Control

• Automate irrigation pumps in greenhouses or fields (Max. switching current: 16A).

• Remotely control or valves (i.e. Shelly Add-On Mechanical Manipulator).

Main applications

• Residential

• MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)

• Light commercial (small office buildings, small retail/restaurant/gas station, etc.)

• Government/municipal

• University/college

Integrations

Simplified internal schematics

Device electrical interfaces

Inputs

• 1 switch/button input on screw terminal

• 1 potential-free contacts relay input on screw terminal

• 2 power supply inputs on screw terminals: N and L

Outputs

• 1 potential-free contacts relay output on screw terminal

Connectivity

• Wi-Fi

• Bluetooth

• Zigbee

Safety function

• Overheating protection

Supported load types

• Resistive (incandescent bulbs, heating appliances)

• Capacitive (capacitor banks, electronic equipment, motor starting capacitors)

• Inductive with RC Snubber (LED light drivers, transformers, fans, refrigerators, air-conditioners, washing machines, tumble dryers)

User interface

Inputs

• One (Control) button

  • Press and hold for 5 seconds to enable Device access point and Bluetooth connection.

  • Press and hold for 10 seconds to factory reset the Device.

  • Press the button 5 times to switch the Device from Matter (default) to Zigbee profile. The Device enters inclusion mode for 3 minutes. Include the Device following the instructions of your Zigbee home automation system.

  • Press the button 3 times to restart the inclusion mode for another 3 minutes if you missed the previous 3-minute window.

Outputs

• LED (monocolor) indication

  • AP (Access Point) enabled and Wi-Fi disabled:
    1 second ON / 1 second OFF

  • Wi-Fi enabled, but not connected to a Wi-Fi network:
    1 second ON / 3 seconds OFF

  • Connected to a Wi-Fi network:
    Constantly ON

  • Cloud is enabled, but not connected:
    1 second ON /5 seconds OFF

  • Connected to Shelly Cloud:
    Constantly ON

  • OTA (Over the Air Update):
    ½ sec ON / ½ second OFF

  • Button pressed and held for 5 seconds:
    ½ second ON / ½ second OFF

  • Button pressed and held for 10 seconds:
    ¼ second ON / ¼ second OFF

The list above starts with the initial device status and the lowest priority. Every next state cancels the previous one.

Specifications

Basic wiring diagrams

Legend

Shelly Smart Control

• Adding the device to Shelly Smart Control

Shelly Web user interface

• Shelly 1 Gen4 Web user interface guide

Components and APIs

• This device

• All Shelly devices and services

Compliance

• Shelly 1 Gen4 multilingual EU declaration of conformity 267 2026-03-13.pdf

• Shelly 1 Gen4 UK PSTI ACT statement of compliance 267 2026-03-13.pdf

• Shelly 1 Gen4 UKCA declaration of conformity 267 2026-03-13.pdf

Printed user guide

• Shelly 1 Gen4 multilingual printed user and safety guide.pdf

• Ръководство за употреба и безопасност

Installation guides