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A compact smart switch featuring power monitoring, multi-protocol support, and fast performance. It is ideal for controlling lights and appliances, providing remote control and energy-saving functions.

Key Features
- New Feature - Multi-protocol connectivity: Choose between Bluetooth, Wi-Fi, or Zigbee.
- New Matter certification.
- New Feature - Wi-Fi, Zigbee range extender, and Bluetooth gateway.
- Power monitoring - Equipped with a precise power meter to understand energy consumption in real-time, with free data storage for analysis.
- Low and high voltage support.
- Perfect for retrofitting existing switches and sockets.
- Supports schedules, scenes, and local operation.
- Supports scripting, HTTPS, MQTTS, inbound and outbound Webhooks.
- Supports virtual components.
- Supports KNXnet/IP communication.
- Internal temperature sensor for overheating protection.
- No hub required! Easy control via the Shelly Smart Control app, most platforms and protocols, and voice assistants. Use it with Alexa, Siri, Home Assistant, Apple HomeKit, or your preferred automation platform.
Use Cases
- Appliance control: Use it to remotely control and automate the operation of various appliances, such as lights, fans, or other devices.
- Power monitoring: Monitor the power consumption of connected devices in real-time. This is useful for understanding energy usage patterns and improving energy efficiency.
- Home automation: Integrate the Shelly 1PM Gen4 into your home automation system to create custom scenes and schedules for your devices.
- Energy efficiency: Utilize the power measurement function to identify energy-hungry devices and make informed decisions to improve your home's overall energy efficiency.
- Remote monitoring: Keep a close eye on your devices even when you are not at home. The remote access feature allows you to monitor and control connected devices from anywhere with an internet connection.
Main Applications
- Residential
- MDU (Multi-Dwelling Units - apartments, condos, hotels, etc.)
- Light commercial (small office buildings, small retail/restaurants/gas stations, etc.)
- Government/Municipalities
- Universities/Colleges
Integrations
Amazon Alexa supported features
Yes
Google Home supported features
Yes
Samsung SmartThings supported features
Yes
Simplified internal schematics

Device electrical interfaces
Inputs
-
1 switch/button input on screw terminal: SW
-
5 power supply inputs on screw terminals: 2 N (+) and 3 L (Ʇ)
Outputs
-
1 relay output with power measurement on screw terminal: O
Add-on interface
-
Shelly proprietary serial interface

⚠CAUTION! High voltage on the add-on interface when the Device is powered!
Connectivity
-
Wi-Fi
-
Ethernet
-
Bluetooth
Safety function
-
Overheating protection
-
Overvoltage protection
-
Overcurrent protection
-
Overpower 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
-
The list above starts with the initial device status and the lowest priority. Every next state cancels the previous one.
Basic wiring diagrams
![]() 110-240 V~ power supply |
![]() 24-30 V⎓ power supply |
Legend
|
Terminals |
|
Wires |
|
|---|---|---|---|
|
I |
Load circuit input terminal |
L |
Live wire (110-240 V~) |
|
O |
Load circuit output terminal |
+ |
24-30V ⎓ positive wire |
|
SW |
Switch (controlling O) input terminal |
N |
Neutral wire |
|
L |
Live terminal (110-240 V~) |
GND |
24-30 V ⎓ ground wire |
|
N |
Neutral terminal |
|
|
|
+ |
24-30 V⎓ positive terminal |
|
|
|
Ʇ |
24-30V⎓ ground terminal |
|
|

Device identification
-
Device name: Shelly 1PM Gen4
-
Device model: S4SW-001P16EU
-
Device SSID: Shelly1PMG4-XXXXXXXXXXXX
-
Device Bluetooth ID: 0x1029



SHELLY APP
Shelly Smart Control is Free!
Download our free app to manage spaces, monitor energy, and track expenses. Upgrade to Premium for even more features!

Specifications
|
Quantity |
Value |
|---|---|
|
Physical |
|
|
Size (HxWxD): |
37x42x16 mm / 1.46x1.65x0.63 inch |
|
Weight: |
27 g / 0.95 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: |
Red |
|
Terminals color: |
Grey (Mouse 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: |
|
|
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 |
|
|
Voltmeter (AC): |
Yes |
|
Ammeter (AC): |
Yes |
|
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 |
|
Bluetooth |
|
|
Protocol: |
5.0 |
|
RF band: |
2402 - 2480 MHz |
|
Max. RF power: |
< 4 dBm |
|
Range: |
Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
|
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 |
|
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 |
Solutions

Lighting Control
Automate home lighting using the Shelly 1PM Gen4. Set schedules, control remotely, monitor energy usage, and ensure lights are on only when needed to improve convenience and reduce electricity costs.

Appliance Energy Monitoring
Use the power metering of the Shelly 1PM Gen4 to monitor the real-time power consumption of connected devices, such as water heaters, kitchen appliances, or washing machines. Identify high-energy-consuming appliances and adjust usage patterns to improve overall energy efficiency.

Smart Socket Control
Install the Shelly 1PM Gen4 behind any socket to easily automate and manage devices based on your schedule and usage. Remotely turn on a space heater to preheat a room or turn off devices at night. With power monitoring, you can track the energy consumption of each device, allowing you to identify energy-hungry units and reduce overall electricity usage.

