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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) 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.
- 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.
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
Yes
Google Smart Home supported traits
Yes
Samsung SmartThings supported capabilities
Yes
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 5 consecutive times to switch the Device from Matter firmware (default) to Zigbee.
- Press 3 consecutive times to put the Device in Zigbee inclusion mode. The Device stays in this mode for 2 minutes and you can find it in the Home Automation platform through the Zigbee Hub.
Outputs
- LED (monocolor) indication
- 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 presses and held for 10 seconds:
¼ secondON
/ ¼ secondOFF
- AP (Access Point) enabled and Wi-Fi disabled:
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 / 1.46×1.65×0.63 inch |
Weight: | 26 g / 0.92 oz |
Screw terminals max torque: | 0.4 Nm / 3.5 lbin |
Conductor cross section: | 0.2 to 2.5 mm² / 24 to 14 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 (Mouse Grey RAL7005, R(106) G(110) B(106), HEX #6A6E6A, LRV 15.19.) |
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: |
|
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: |
|
Max. switching current: |
|
Sensors, meters | |
Internal-temperature sensor: | Yes |
Radio | |
Wi-Fi | |
Protocol: | 802.11 b/g/n |
RF band: | 2412 – 2472 МHz |
Max. RF power: | < 20 dBm |
Range: | Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions) |
Bluetooth | |
Protocol: | 4.2 |
RF band: | 2402 – 2480 MHz |
Max. RF power: | < 4 dBm |
Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions) |
Zigbee | |
Protocol: | 802.15.4 |
Zigbee repeater: | Yes |
RF bands: | 2400 to 2483.5 MHz |
Max. RF power: | < 20 dBm |
Range: | Up to 100 m / 328 ft indoors and 300 meters / 984 ft outdoors (Depends 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
![]()
110-240 V~ power supply |
![]()
24-48 V⎓ power supply |
![]()
12 V⎓ stabilized power supply |
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 | ||
+ | 24-48 V⎓ positive terminal | ||
Ʇ | 12/24-48V⎓ ground terminal |