Device identification
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Device name: Shelly 1 Gen4
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Device model: S4SW-001X16EU
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Device SSID: Shelly1G4-XXXXXXXXXXXX
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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
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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.
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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.
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Local and Cloud Control: Can function independently in a local Wi-Fi network and can also be operated through cloud home automation services.
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Bluetooth Connectivity: Bluetooth and BLE gateways are available for inclusion purposes, which may be useful during the setup process.
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Zigbee Connectivity: Zigbee is available for inclusion purposes, which may be useful during the setup process.
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User-Friendly Interface: The device provides a user-friendly interface with a reset button for manual interactions.
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Improved Processor: Upgraded with an improved processor and support for Zigbee connectivity.
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Embedded Web Interface: Features an embedded web interface for monitoring, control, and adjustment of settings.
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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.
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Dry Contact: Allows switching on and off of lower voltage devices.
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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.
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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.
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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.
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Scripting: https://shelly-api-docs.shelly.cloud/gen2/ComponentsAndServices/Script
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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
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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.
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Virtual Components: https://shelly-api-docs.shelly.cloud/gen2/DynamicComponents/Virtual/
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KNX net/IP support: https://shelly-api-docs.shelly.cloud/gen2/Integrations/KNX/
Use cases
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Remote Appliance Control: Turn on or off electric appliances remotely using your mobile phone, tablet, PC, or home automation system.
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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.
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Home Automation: Shelly 1 Gen4 enables automatic control of power appliances for more relaxing and enjoyable experience.
Home Automation Use Cases
Light Control
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Remote control of standard lights (LED, incandescent, halogen).
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Set timers or schedules for lights (e.g., porch lights on at sunset).
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Use with motion sensors (for example Shelly BLU Motion) for occupancy-based lighting.
Garage Door Automation
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Act as a smart trigger to open/close garage doors.
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Monitor door status with a sensor input i.e using Shelly Plus Add-on.
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Integrate with voice assistants for hands-free control.
Fan or Ventilation Control
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Automate bathroom or kitchen fans based on humidity sensors (like Shelly BLU H&T).
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Turn on ventilation during specific times of day or based on occupancy.
Heater or Towel Rail Switching
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Control electric towel warmers or heaters (Max. switching current: 16A).
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Schedule operation or link to temperature thresholds via sensors (like Shelly BLU H&T).
Commercial Applications
Lighting Automation in Small Offices or Shops
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Control light zones based on business hours.
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Use with motion detectors (for example Shelly BLU Motion) for energy savings.
Meeting Room Occupancy
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Enable or disable equipment like projectors depending on occupancy.
Security and Access Systems
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Remotely unlock gates or doors for deliveries.
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Monitor open/close state of access points.
Industrial/Utility Use Cases
Equipment Monitoring & Control
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Power cycling routers, modems, or network switches.
Pump or Motor Control
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Automate irrigation pumps in greenhouses or fields (Max. switching current: 16A).
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Remotely control or valves (i.e. Shelly Add-On Mechanical Manipulator).
Main applications
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Residential
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MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)
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Light commercial (small office buildings, small retail/restaurant/gas station, etc.)
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Government/municipal
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University/college
Integrations
Amazon Alexa supported capabilities
Google Smart Home supported traits
Samsung SmartThings supported capabilities
Simplified internal schematics
Device electrical interfaces
Inputs
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1 switch/button input on screw terminal
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1 potential-free contacts relay input on screw terminal
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2 power supply inputs on screw terminals: N and L
Outputs
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1 potential-free contacts relay output on screw terminal
Connectivity
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Wi-Fi
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Bluetooth
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Zigbee
Safety function
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Overheating protection
Supported load types
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Resistive (incandescent bulbs, heating appliances)
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Capacitive (capacitor banks, electronic equipment, motor starting capacitors)
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Inductive with RC Snubber (LED light drivers, transformers, fans, refrigerators, air-conditioners, washing machines, tumble dryers)
User interface
Inputs
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One (Control) button
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Press and hold for 5 seconds to enable Device access point and Bluetooth connection.
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Press and hold for 10 seconds to factory reset the Device.
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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.
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Press the button 3 times to restart the inclusion mode for another 3 minutes if you missed the previous 3-minute window.
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Outputs
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LED (monocolor) indication
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AP (Access Point) enabled and Wi-Fi disabled:
1 secondON/ 1 secondOFF -
Wi-Fi enabled, but not connected to a Wi-Fi network:
1 secondON/ 3 secondsOFF -
Connected to a Wi-Fi network:
ConstantlyON -
Cloud is enabled, but not connected:
1 secondON/5 secondsOFF -
Connected to Shelly Cloud:
ConstantlyON -
OTA (Over the Air Update):
½ secON/ ½ secondOFF -
Button pressed and held for 5 seconds:
½ secondON/ ½ secondOFF -
Button pressed and held for 10 seconds:
¼ secondON/ ¼ secondOFF
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The list above starts with the initial device status and the lowest priority. Every next state cancels the previous one.
Specifications
| Quantity | Value |
|---|---|
| Physical | |
| Size (HxWxD): | 37x42x16 mm / 1.46x1.65x0.63 inch |
| Weight: | 26 g / 0.92 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 console |
| Shell material: | Plastic |
| Shell color: | Blue |
| Terminals color: | Grey |
| 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: |
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| Power consumption: | < 1 W |
| Neutral not needed: | No |
| External protection: | Cable protection switch in accordance with EN60898-1 (tripping characteristic B or C, max. 16 A rated current, min. 6 kA interrupting rating, energy limiting class 3) |
| Output circuits ratings | |
| Max. switching voltage: |
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| Max. switching current: |
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| Sensors, meters | |
| Internal-temperature sensor: | Yes |
| Radio | |
| Wi-Fi | |
| Protocol: | 802.11 b/g/n/ax |
| RF band: | 2401 - 2483 МHz |
| Max. RF power: | < 20 dBm |
| Range: | Up to 50 m / 164 ft outdoors, up to 30 m / 98 ft indoors (depending on local conditions) |
| Bluetooth | |
| Protocol: | 5 (LE) |
| RF band: | 2402 - 2480 MHz |
| Max. RF power: | < 20 dBm |
| Range: | Up to 30 m / 98 ft outdoors, up to 10 m / 33 ft indoors (depending on local conditions) |
| Zigbee | |
| Protocol: | 3.0 |
| Zigbee repeater: | Yes |
| RF bands: | 2405 - 2480 MHz |
| Max. RF power: | < 20 dBm |
| Range: | Up to 300 m / 984 ft outdoors, up to 100 m / 328 ft indoors (depending on local conditions) |
| Microcontroller unit | |
| CPU: | ESP-Shelly-C68F |
| Flash: | 8MB |
| Firmware capabilities | |
| Schedules: | 20 |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Scripting: | Yes |
| MQTT: | Yes |
Basic wiring diagrams
Legend
| Terminals | | Wires | |
|---|---|---|---|
| I | Load circuit input terminal | L | Live wire (110-240 V~) |
| O | Load circuit output terminal | N | Neutral wire |
| SW | Switch (controlling O) input terminal | + | 12/24-48V ⎓ positive wire |
| +12V | 12 V⎓ positive terminal | GND | 12/24-48V⎓ ground wire |
| L | Live terminal (110-240 V~) | | |
| N | Neutral terminal |
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| + | 24-48 V⎓ positive terminal |
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| Ʇ | 12/24-48V⎓ ground terminal | | |
Shelly Smart Control
Shelly Web user interface
Components and APIs
Compliance
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Shelly 1 Gen4 multilingual EU declaration of conformity 267 2026-03-13.pdf
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Shelly 1 Gen4 UK PSTI ACT statement of compliance 267 2026-03-13.pdf
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Shelly 1 Gen4 UKCA declaration of conformity 267 2026-03-13.pdf
Printed user guide
Installation guides
