Shelly 1PM Gen4
Device Identification
- Device name: Shelly 1PM Gen4
- Device model: S4SW-001P16EU
- Device SSID: Shelly1PMG4-XXXXXXXXXXXX
- Device Bluetooth ID:
0x1029
Short Description
The Shelly 1PM Gen4 is a compact smart switch with built-in power measurement, enabling remote control of electrical appliances via mobile phone, tablet, PC, or home automation systems. It operates either standalone on a local Wi-Fi network or through cloud-based home automation services.
It can be accessed, controlled, and monitored remotely from anywhere with internet connectivity—provided the device is connected to a Wi-Fi router and the internet.
Designed for retrofitting into standard electrical wall boxes, behind power sockets, light switches, or other tight spaces, this device features an embedded web interface for configuration and monitoring.
Equipped with a multi-protocol wireless MCU, it supports Zigbee and Bluetooth connectivity for secure integration. The device is also Matter-compatible.
Main Features
- Wi-Fi Connectivity: Connects to your home Wi-Fi network (802.11 b/g/n/ax) for remote monitoring and control.
- Bluetooth Connectivity: Supports BLE gateway functionality for setup and device inclusion.
- Zigbee Connectivity: Enables integration with Zigbee ecosystems; acts as a repeater.
- Smart Home Integration: Compatible with Google Assistant, Amazon Alexa, and Samsung SmartThings for voice control and automation.
- Smart Switch with Power Measurement: Controls devices while measuring real-time energy consumption.
- Compact Design: Small form factor ideal for installation in confined spaces (e.g., wall boxes, behind outlets).
- Remote Control: Full remote access via smartphone, tablet, PC, or home automation platforms.
- Local & Cloud Control: Operates independently locally or via cloud services.
- Improved Processor: Enhanced performance with support for Zigbee and advanced scripting.
- Remote Access: Monitor and manage devices globally when connected to the internet.
- Embedded Web Interface: Built-in web UI for configuration, monitoring, and settings adjustment.
- Wireless Protocols: Wi-Fi (802.11 b/g/n/ax), Bluetooth 5.0.
- BLE Gateway: Bridges Shelly BLU devices to the broader Shelly ecosystem.
- Wi-Fi Range Extender: Boosts Wi-Fi signal coverage by receiving and retransmitting signals.
- Zigbee Range Extender: Expands Zigbee network reach by amplifying and relaying signals.
- Scripting Support: Custom automation using Shelly Script Language
- Wide Integrations: HTTP API, MQTT(s), Webhooks (HTTP/HTTPS), UDP.
- Scheduling: Define complex time-based operations (date, time, weekdays, hours, minutes, seconds).
- Virtual Components: Dynamic virtual devices via Shelly Virtual Components
- KNX net/IP Support: Integration with KNX systems via KNX Integration Guide
Use Cases
Appliance Control
- Remotely manage lights, fans, heaters, and other electrical devices.
Power Monitoring
- Track real-time power usage to understand energy consumption patterns and improve efficiency.
Home Automation
- Create custom scenes and schedules within your smart home system.
Energy Efficiency
- Identify high-energy-consuming devices and optimize usage.
Remote Monitoring
- Keep track of connected devices even when away from home.
Home Automation Use Cases
Lighting Control with Power Monitoring
- Remotely turn lights on/off and monitor their power draw.
- Detect failed bulbs by observing sudden drops in power usage.
- Identify rooms with excessive lighting energy use.
Appliance Monitoring and Automation
- Automate high-load devices (oven, dishwasher, washing machine).
- Trigger notifications upon completion (e.g., laundry cycle ends).
- Schedule operation during off-peak electricity hours.
Heater and Boiler Control
- Control electric water heaters or room heaters (max. switching current: 16A).
- Monitor heating energy costs.
- Automate based on temperature or time-of-day schedules.
Overload Protection
- Set maximum power thresholds.
- Automatically shut off if power draw exceeds safe limits.
Commercial & Retail Applications
Energy Optimization in Offices
- Track shared equipment (printers, coffee machines).
- Automatically power down after work hours.
Lighting Zones with Energy Analytics
- Group lighting by zones and analyze usage for cost savings.
Preventive Maintenance
- Detect abnormal power trends indicating potential faults in machinery or fixtures.
Industrial & Utility Applications
Motor or Pump Control with Monitoring
- Control irrigation or circulation pumps (max. 16A).
- Monitor motor performance via energy usage (under/over-performance detection).
Solar/Off-Grid Power Use Tracking
- Monitor loads powered by inverters or battery backups (max. 16A).
- Optimize load distribution based on solar generation or battery levels.
Main Applications
- Residential homes
- Multi-Dwelling Units (apartments, condos, hotels)
- Light commercial (small offices, retail stores, restaurants, gas stations)
- Government/municipal buildings
- Universities and colleges
Integrations
Amazon Alexa Supported Capabilities
Google Smart Home Supported Traits
Samsung SmartThings Supported Capabilities
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 present on add-on interface when device is powered.
Connectivity
- Wi-Fi
- Bluetooth
- Zigbee
- Matter
Safety Functions
- 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 drivers, transformers, fans, refrigerators, air conditioners, washing machines, tumble dryers
User Interface
Inputs
- One (Control) Button
- Press and hold for 5 seconds: Enable Device Access Point & Bluetooth.
- Press and hold for 10 seconds: Factory reset.
- Press 5 times: Switch from Matter (default) to Zigbee profile (enters inclusion mode for 3 minutes).
- Press 3 times: Restart inclusion mode for another 3 minutes if missed earlier window.
Outputs
- LED (Monocolor Indication)
- AP enabled, Wi-Fi disabled: 1s ON / 1s OFF
- Wi-Fi enabled but not connected: 1s ON / 3s OFF
- Connected to Wi-Fi network: Constantly ON
- Cloud enabled but not connected: 1s ON / 5s OFF
- Connected to Shelly Cloud: Constantly ON
- OTA update in progress: ½s ON / ½s OFF
- Button pressed and held for 5 sec: ½s ON / ½s OFF
- Button held for 10 sec: ¼s ON / ¼s OFF
Note: States are prioritized; later states override earlier ones.
Specifications
| Category | Value |
|---|---|
| Physical | |
| Size (H×W×D) | 37×42×16 mm / 1.46×1.65×0.63 in |
| Weight | 27 g / 0.95 oz |
| Screw Terminal Max Torque | 0.4 Nm / 3.5 lbin |
| Conductor Cross Section | 0.5 to 4 mm² / 20 to 11 AWG (solid, stranded, bootlace ferrules) |
| Conductor Stripped Length | 6–7 mm / 0.24–0.28 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 | 110–240 V~ OR 24–30 V⎓ |
| Power Consumption | < 1 W |
| Neutral Required | No |
| External Protection | Cable protection switch per EN60898-1 (B/C characteristic, max 16 A, min 6 kA interrupting rating, class 3 energy limiting) |
| Output Circuit Ratings | |
| Max Switching Voltage | 240 V~ OR 30 V⎓ |
| Max Switching Current | 16 A (240 V~) OR 10 A (30 V⎓) |
| Sensors & Meters | |
| Voltmeter (AC) | Yes |
| Ammeter (AC) | Yes |
| Internal Temperature Sensor | Yes |
| Radio | |
| Wi-Fi | |
| Protocol | 802.11 b/g/n/ax |
| RF Band | 2412 – 2472 MHz |
| Max RF Power | < 20 dBm |
| Range | Up to 30 m indoors / 50 m outdoors (Depends on local conditions) |
| Bluetooth | |
| Protocol | 5.0 |
| RF Band | 2402 – 2480 MHz |
| Max RF Power | < 4 dBm |
| Range | Up to 10 m indoors / 30 m outdoors (Depends on local conditions) |
| Zigbee | |
| Protocol | 802.15.4 |
| Zigbee Repeater | Yes |
| RF Bands | 2400 – 2483.5 MHz |
| Max RF Power | < 20 dBm |
| Range | Up to 100 m indoors / 300 m outdoors (Depends on local conditions) |
| Microcontroller Unit | |
| CPU | ESP-Shelly-C68F |
| Flash | 8 MB |
| Firmware Capabilities | |
| Schedules | 20 |
| Webhooks (URL Actions) | 20 hooks with up to 5 URLs each |
| Scripting | Yes |
| MQTT | Yes |
Basic Wiring Diagrams
| AC Wiring | DC Wiring |
|---|---|
 |  |
| 110–240 V~ Power Supply | 24–30 V⎓ Power Supply |
Legend
| Terminal | Function | Wire | Function |
|---|---|---|---|
| O | Load circuit output terminal | L | Live wire (110–240 V~) |
| SW | Switch (controls O) input terminal | + | 24–30 V⎓ positive wire |
| L | Live terminal (110–240 V~) | N | Neutral wire |
| N | Neutral terminal | — | — |
| + | 24–30 V⎓ positive terminal | — | — |
| Ʇ | 24–30 V⎓ ground terminal | — | — |
Shelly Smart Control
Shelly Web User Interface
Components and APIs
Compliance
- Shelly 1PM Gen4 Multilingual EU Declaration of Conformity (2025-07-25)
- Shelly 1PM Gen4 UK PSTI ACT Statement of Compliance
Compliance Archive
- [Shelly 1PM Gen4 Multilingual EU Declaration of Conformity (2025-03-10)](/wiki/spaces/KB/pages/974159873/Shelly+1PM+Gen4?preview=%2F974159873%2F1623261435%2FShelly+1PM+Gen4+multilingual+EU+declaration+of+conformity+76+2025-03-10.pdf)Printed User Guide
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Installation Guides
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