A one-channel, dry contact smart switch for controlling lights and appliances. Enjoy faster performance and multiprotocol support (Wi-Fi, Zigbee, Matter, Bluetooth).

FEATURES

• New - Multiprotocol connectivity: Choose from Bluetooth, Wi-Fi or Zigbee.

• New - Matter certified.

• New - Works with Apple Homekit: Control connected devices using Apple Home app or Siri through Matter

• Dry contacts (potential-free)​ - option for contactor control. Allows switching on and off of lower voltage devices.

• Low and high voltage support

• Perfect to retrofit behind existing switches and sockets

• Supports schedules, scenes and local actions

• Supports scripting, HTTPS, MQTTS, Inbound and Outbound Web Sockets

• Supports virtual components

• Supports KNXnet / IP communication

• Internal temperature sensor for overheating protection

• No hub required! Easy control through the Shelly Smart Control app, most platforms and protocols, as well as voice assistants. Use it with Alexa, Sir, Home Assistant, Apple Homekit or your preferred automation platform

TYPICALLY USED FOR:

Lighting, Heating & Cooling, Applicances, Doorbell, Irrigation

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/Scripts/ShellyScriptLanguageFeatures/

• 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.

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

Amazon Alexa supported capabilities

• Turn On/Off

Google Smart Home supported traits

• Turn On/Off

Samsung SmartThings supported capabilities

• Turn On/Off

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.