Shelly 1PM
Device Identification
- Device name: Shelly 1PM
- Device model: SHSW-PM
- Device SSID: shelly1pm-XXXXXX
Short Description
The Shelly 1PM is a compact smart switch with integrated power measurement, enabling remote control of electrical appliances via smartphone, tablet, PC, or home automation systems. It operates standalone within a local Wi-Fi network or can be managed through cloud-based home automation services.
With internet connectivity, users can access, control, and monitor the device from anywhere, provided it is connected to a Wi-Fi router and the internet.
Designed for retrofit installation, the Shelly 1PM fits into standard electrical wall boxes, behind power outlets, light switches, or other space-constrained locations.
It features an embedded web interface for device 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
- One switch/button input on screw terminal
- Three power supply inputs on screw terminals: N (+), L, L1
Outputs
- One relay output with power measurement on screw terminal
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
Safety Features
- Overheating 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
Physical Controls
- One (Reset) button
- Press and hold for 5 seconds to enable Device Access Point mode.
- Press and hold for 10 seconds to perform a factory reset.
LED Indicator (Red)
The LED status indicates device state, with priority given to the most recent event:
| Status | LED Behavior |
|---|---|
| AP enabled, Wi-Fi disabled | 1 second ON / ¼ second OFF |
| Wi-Fi enabled, not connected | 2 seconds ON / ¼ second OFF |
| Connected to Wi-Fi network | Constantly ON |
| Cloud enabled, not connected | 1 second ON / 5 seconds OFF |
| Connected to Shelly Cloud | Constantly ON |
| OTA (Over-the-Air Update) in progress | ½ second ON / ½ second OFF |
| Button pressed and held for 5 seconds | ¼ second ON / ¼ second OFF |
| Button pressed and held for 10 seconds | ⅛ second ON / ⅛ second OFF |
Note: The LED states are prioritized—later states override earlier ones.
Specifications
| Category | Specification |
|---|---|
| Physical | |
| Size (H×W×D) | 36 × 41 × 17 mm / 1.42 × 1.61 × 0.67 in |
| Weight | ~35 g |
| 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 / 24–60 VDC |
| Power consumption | < 1 W |
| Output Circuit Ratings | |
| Max switching voltage (AC) | 250 V |
| Max switching voltage (DC) | 60 V |
| Max switching current (AC) | 16 A |
| Max switching current (DC) | 10 A |
| Sensors & Meters | |
| Internal temperature sensor | Yes |
| Wattmeter (AC) | Yes |
| Radio | |
| RF band | 2401 – 2495 MHz |
| Max RF power | < 20 dBm |
| Wi-Fi protocol | 802.11 b/g/n |
| Wi-Fi range | Up to 30 m / 100 ft indoors, up to 50 m / 160 ft outdoors (Depends on local conditions) |
| MCU | |
| CPU | ESP8266 |
| Flash | 2 MB |
| Firmware Capabilities | |
| Schedules | 18 |
| Webhooks (URL actions) | 6 hooks, up to 5 URLs per hook |
| Scripting | No |
| MQTT | Yes |
| CoAP | Yes |
Basic Wiring Diagrams
Legend
| Symbol | Meaning |
|---|---|
| Terminals | |
| I | Load circuit input terminal |
| O | Load circuit output terminal |
| SW | Switch (controlling O) input terminal |
| L, L1 | Live (110–240 VAC) terminal |
| N | Neutral terminal |
| + | Positive wire |
| - | Negative wire |
| Wires | |
| L | Live (110–240 VAC) wire |
| N | Neutral wire |
Troubleshooting
(Content pending)
Web Interface Guide
Read the Shelly 1PM Web Interface Guide
Components and APIs
Printed User Guide
Printed User Guide – English, Deutsch, Italiano, Español, Português, Français
Compliance
Shelly 1PM Multilingual EU Declaration of Conformity
Installation Guides
(Installation guides not available yet)