The Shelly Plug M Gen3 is a smart plug with built-in power monitoring designed for remote control, energy consumption tracking, and smart automation of electrical appliances. It can be used to automate lamps, fans, portable heaters, coffee machines, televisions, washing machines, and many other household devices without replacing the original appliance.

The device features both Wi-Fi and Bluetooth connectivity, allowing direct connection to the home network without the need for a dedicated hub. Thanks to Matter support, it can easily integrate with Apple Home, Google Home, Amazon Alexa, Samsung SmartThings, and Home Assistant systems.

The Shelly Plug M Gen3 includes built-in energy monitoring functionality capable of displaying real-time voltage, current, power consumption, and energy usage data. It is an excellent choice for energy optimization tasks and monitoring high-consumption devices, helping reduce unnecessary electricity costs.

The device supports schedules, automatic ON/OFF switching, local automations, webhooks, MQTT integration, and scripting functionality. Timers and automations can run locally even without internet access, ensuring reliable operation independently from cloud connectivity.

The Shelly Plug M Gen3 also functions as a BLE Gateway and Wi-Fi range extender. It enables integration of Shelly Bluetooth sensor data into the smart home system while improving Wi-Fi coverage for other Shelly devices through the built-in Wi-Fi extender feature.

The smart plug is ideal for automations such as automatic heater control based on temperature, washing machine or dishwasher cycle monitoring, reducing energy waste with automatic shutdowns, or presence simulation while traveling.

About the Shelly Brand

Shelly is one of the most recognized and innovative smart home brands in Europe, developed by the Bulgarian company Allterco Robotics. The manufacturer is particularly strong in the market of Wi-Fi and Bluetooth-based smart devices, whose main advantage is that they generally operate without a central hub, allowing quick and easy installation using only a working Wi-Fi network.

The Shelly product portfolio is extremely broad and includes relays, sensors, smart plugs, lighting solutions, and professional DIN rail mounted devices. The brand places strong emphasis on local control, meaning devices can continue operating without internet access, improving reliability and data security.

Shelly devices offer advanced integration capabilities with native support for REST API, MQTT, and Webhook communication, making them easy to integrate with systems such as Home Assistant, openHAB, Node-RED, and other DIY solutions. They are also compatible with popular cloud platforms including Google Home, Amazon Alexa, and Samsung SmartThings.

The manufacturer continuously develops its products, and the latest generations already include Bluetooth gateway, Wi-Fi range extender, and additional networking functions. Shelly products are especially popular among advanced users and installers while remaining simple enough for beginners.

Main Product Features

• Remote control: Switch connected devices ON or OFF remotely from a smartphone or automation.
• Power monitoring: Real-time monitoring of energy consumption, voltage, current, and power.
• Matter support: Easy integration into modern smart home ecosystems.
• Multicolor LED status indicator: Color-coded feedback (green, yellow, red) for power consumption and status.
• Wi-Fi range extender: Extends Wi-Fi coverage for other Shelly devices.
• BLE Gateway: Integrates Shelly Bluetooth sensors into the home network.
• Local automations: Timers and automations continue operating without internet access.
• Scripting support: Create custom automations and logic.
• Virtual components: Integrate non-Shelly devices into the Shelly ecosystem.
• Built-in web interface: Direct browser-based configuration (default IP: 192.168.33.1).

Smart Home Protocols and Platform Compatibility

• Supported protocols: Wi-Fi and Bluetooth.
• Matter compatibility: Supports Apple Home, Google Home, Amazon Alexa, SmartThings, and other Matter platforms.
• Bluetooth connectivity: Bluetooth 4.2 support for configuration and BLE Gateway functionality.
• Wi-Fi connectivity: Direct connection to 2.4 GHz Wi-Fi networks.
• Shelly Smart Control support: Full integration with the Shelly application.
• Home Assistant compatibility: Supports MQTT and local API integration.
• MQTT support: Integration with open automation systems.
• Webhook support: Supports HTTP-based automation events.
• Amazon Alexa compatibility: Voice control support.
• Google Home compatibility: Google Assistant integration.
• Samsung SmartThings compatibility: SmartThings integration support.

Smart Functions

• Remote ON/OFF control.
• Real-time energy monitoring.
• Voltage and current measurement.
• Automatic shutdown timer.
• Weekly schedules and automations.
• Local automation without internet connection.
• Washing machine or dishwasher cycle monitoring based on power consumption.
• Presence simulation with automated lighting.
• Heating control using external temperature sensors.
• Virtual component support.
• Wi-Fi network extension.
• BLE Gateway functionality.
• OTA firmware updates.
• Local web interface.

Electrical Features

• Power supply: 220–240 V AC, 50 Hz.
• Maximum switching voltage: 240 V AC.
• Maximum switching current: 13 A.
• Maximum load: 3000 W (resistive load).
• Power monitoring: Yes.
• Internal temperature sensor: Yes.
• Overheating protection: Yes.
• Overvoltage protection: Yes.
• Overcurrent protection: Yes.
• Overpower protection: Yes.
• Supported loads: Resistive, inductive, and capacitive loads.

Technical Specifications

• Model: S3PL-30110EU
• Dimensions: 46 × 46 × 85 mm
• Weight: 73 g
• Compatible sockets: CEE 7/1, CEE 7/3 (Type F / Schuko), CEE 7/5 (Type E)
• Compatible plugs: CEE 7/2, CEE 7/4, CEE 7/7, CEE 7/16, CEE 7/17
• Housing material: Plastic
• Available colors: White and black
• Operating temperature: Between -20 °C and +40 °C
• Operating humidity: 30–70% RH
• Maximum installation altitude: 2000 m
• Supply voltage: 220–240 V~, 50 Hz
• Self-consumption: < 1 W
• Rated impulse withstand voltage: 2500 V
• Switching cycles: 10,000
• Internal temperature sensor: Yes
• AC voltage measurement: Yes
• AC current measurement: Yes
• Energy consumption measurement: Yes
• Wi-Fi protocol: 802.11 b/g/n
• Wi-Fi frequency: 2412–2484 MHz
• Wi-Fi RF power: < 10 dBm
• Bluetooth protocol: 4.2
• Bluetooth frequency: 2402–2480 MHz
• Bluetooth range: Up to 10 m indoors and 30 m outdoors
• Microcontroller: ESP-Shelly-C38F
• Flash memory: 8 MB
• Webhook support: 20 webhooks with 5 URLs per webhook
• Scripting support: Yes
• MQTT support: Yes
• CoAP support: No