Shelly Plus 1PM
Device Identification
- Device name: Shelly Plus 1PM
- Device model: SNSW-001P16EU
- Device SSID: ShellyPlus1PM-XXXXXX
Short Description
The Shelly Plus 1PM is a compact smart switch with built-in power measurement, enabling remote control of electrical appliances via smartphone, tablet, PC, or home automation systems. It operates either standalone within a local Wi-Fi network or through cloud-based home automation services.
Users can access, control, and monitor the device remotely from any location with internet connectivity, provided the device is connected to a Wi-Fi router and the Internet.
Designed for retrofit installation, it fits into standard electrical wall boxes, behind power outlets, light switches, or other space-constrained locations.
The device includes an embedded web interface for monitoring, control, and configuration.
Main Applications
- Residential
- MDU (Multi Dwelling Units – apartments, condominiums, hotels, etc.)
- Light Commercial (small offices, retail stores, restaurants, gas stations, etc.)
- Government / Municipal
- University / College
Integrations
- Google Assistant
- Samsung SmartThings
- Amazon Alexa
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 is present on the add-on interface when the device is powered.
Connectivity
- Wi-Fi (802.11 b/g/n)
- Bluetooth 4.2
Safety Features
- Overheating protection
- Overvoltage protection
- Overcurrent protection
- Overpower protection
Supported Load Types
- Resistive (incandescent bulbs, heating devices)
- Capacitive (capacitor banks, electronic equipment, motor start capacitors)
- Inductive with RC snubber (LED drivers, transformers, fans, refrigerators, air conditioners)
User Interface
Inputs
- One (Reset) button
- Press and hold for 5 seconds to enable Device Access Point and Bluetooth connection.
- Press and hold for 10 seconds to perform a factory reset.
Outputs
- LED (monochrome indicator)
- AP enabled, Wi-Fi disabled: 1 sec ON / 1 sec OFF
- Wi-Fi enabled, not connected: 1 sec ON / 3 sec OFF
- Connected to Wi-Fi network: Constantly ON
- Cloud enabled, not connected: 1 sec ON / 5 sec OFF
- Connected to Shelly Cloud: Constantly ON
- OTA (Over-the-Air Update): 0.5 sec ON / 0.5 sec OFF
- Button pressed and held for 5 seconds: 0.5 sec ON / 0.5 sec OFF
- Button pressed and held for 10 seconds: 0.25 sec ON / 0.25 sec OFF
The LED states are prioritized in order listed. Each subsequent state overrides the previous one.
Specifications
| Category | Type | Value |
|---|---|---|
| Physical | Size (HxWxD) | 37 × 42 × 16 ±0.5 mm / 1.46 × 1.65 × 0.63 ±0.02 in |
| Weight | 27 g / 0.95 oz | |
| Mounting | Wall console | |
| Screw terminals max torque | 0.4 Nm / 3.5 lbf·in | |
| Conductor cross section | 0.5 to 1.5 mm² / 20 to 16 AWG | |
| Conductor stripped length | 5 to 6 mm / 0.20 to 0.24 in | |
| Shell material | Plastic | |
| Color | Red | |
| Environmental | Ambient 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 VAC / 24–30 VDC |
| Power consumption | < 1.2 W | |
| Max switching voltage (AC) | 240 V | |
| Max switching voltage (DC) | 30 V | |
| Max switching current (AC) | 16 A | |
| Max switching current (DC) | 10 A | |
| Internal temperature sensor | Yes | |
| Voltmeter (AC) | Yes | |
| Ammeter (AC) | Yes | |
| Radio | RF band | 2400 – 2495 MHz |
| Max RF power | <20 dBm | |
| Wi-Fi protocol | 802.11 b/g/n | |
| Wi-Fi range | Up to 30 m indoors / 50 m outdoors (varies by environment) | |
| Bluetooth protocol | 4.2 | |
| Bluetooth range | Up to 10 m indoors / 30 m outdoors (varies by environment) | |
| MCU | CPU | ESP32-U4WDH |
| Flash | 4 MB | |
| Firmware Capabilities | Schedules | 20 |
| Webhooks (URL actions) | 20 hooks, up to 5 URLs per hook | |
| Scripting | Yes | |
| MQTT | Yes | |
| CoAP | No |
Basic Wiring Diagrams
AC Wiring – Resistive Load
AC Wiring – Inductive Load with RC Snubber
DC Wiring – Resistive Load
DC Wiring – Inductive Load with RC Snubber
Legend
| Symbol | Description |
|---|---|
| O | Load circuit output terminal |
| + | 24–30 VDC positive wire/terminal |
| SW | Switch (controls O) input terminal |
| N | Neutral wire/terminal |
| L | Live (110–240 VAC) terminal |
| GND | 24–30 VDC ground wire |
| Ʇ | 24–30 VDC ground terminal |
Troubleshooting
Device Is Overheating
- Avoid using the L and N terminals as bridges. Doing so doubles the current flow, leading to overheating.
- Bridging is only safe for low-current applications where total current remains below 16 A.
- Ensure ambient temperature does not exceed 40 °C (105 °F).
- If installed in a confined space, poor ventilation may raise internal temperatures beyond safe limits. Provide adequate airflow around the device.
Web Interface Guide
Read the Shelly Plus 1PM Web Interface Guide
Components and APIs
Printed User Guide
Shelly Plus 1PM Multilingual User and Safety Guide.pdf
Compliance
- Shelly Plus 1PM Multilingual EU Declaration of Conformity
- Shelly Plus 1PM UK PSTI ACT Statement of Compliance
- Shelly Plus 1PM x2 UK PSTI ACT Statement of Compliance
- Shelly Plus 1PM AU/NZ Certificate for Suitability
Installation Guides
(No guides available at this time)