Shelly Plus 1

Device Identification

• Device name: Shelly Plus 1
• Device model: SNSW-001X16EU
• Device SSID: ShellyPlus1-XXXXXX

Short Description

The Shelly Plus 1 is a compact smart switch with potential-free contacts, enabling remote control of electrical appliances via smartphone, tablet, PC, or home automation systems. It operates standalone on a local Wi-Fi network or integrates with 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 space-constrained environments, it can be retrofitted into standard electrical wall boxes, behind power outlets, light switches, or other tight spaces.

The device features 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
• 1 potential-free contacts relay input on screw terminal: I
• 3 power supply inputs on screw terminals: N (+), L (Ʇ), and 12V

Outputs

• 1 potential-free contacts relay output 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. Handle with care.

Connectivity

• Wi-Fi (802.11 b/g/n)
• Bluetooth 4.2

Safety Features

• Overheating 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 Control 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 (Red) Indication

• AP enabled, Wi-Fi disabled:
  1 second ON / 1 second OFF
  

• Wi-Fi enabled, not connected to a network:
  1 second ON / 3 seconds OFF
  

• Connected to Wi-Fi network:
  Constantly ON
  

• Cloud enabled, but not connected:
  1 second ON / 5 seconds OFF
  

• Connected to Shelly Cloud:
  Constantly ON
  

• OTA (Over-the-Air Update):
  ½ second ON / ½ second OFF
  

• Button pressed and held for 5 seconds:
  ½ second ON / ½ second OFF
  

• Button pressed and held for 10 seconds:
  ¼ second ON / ¼ second OFF
  

Note: The LED states are prioritized in order of appearance. 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	26 g / 0.92 oz
	Mounting	Wall console
	Screw terminals max torque	0.4 Nm / 3.5 lbin
	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	Blue
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 / 24–48 VDC / 12 VDC ±10%
	Power consumption	< 1.2 W
Output circuits ratings	Max switching voltage AC	240 V
	Max switching voltage DC	30 V
	Max switching current AC	16 A
	Max switching current DC	10 A
Sensors, meters	Internal temperature sensor	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 (depends on local conditions)
	Bluetooth protocol	4.2
	Bluetooth range	Up to 10 m indoors / 30 m outdoors (depends on local conditions)
MCU	CPU	ESP32-U4WDH
	Flash	4 MB
Firmware capabilities	Schedules	20
	Webhooks (URL actions)	20 with 5 URLs per hook
	Scripting	Yes
	MQTT	Yes
	CoAP	No

Basic Wiring Diagrams

110–240 VAC power supply
Resistive load

110–240 VAC power supply
Inductive load with RC snubber

24–48 VDC power supply
Resistive load

24–48 VDC power supply
Inductive load with RC snubber

12 VDC stabilized power supply
Resistive load

12 VDC stabilized power supply
Inductive load with RC snubber

Legend

Terminals

• I: Load circuit input terminal
• O: Load circuit output terminal
• L: Live (110–240 VAC) terminal
• N: Neutral terminal
• +: 24–48 VDC positive terminal
• +12V: 12 VDC positive terminal
• GND: 12 / 24–48 VDC ground terminal
• Ʇ: 12 / 24–48 VDC ground terminal

Wires

• L: Live (110–240 VAC) wire
• N: Neutral wire
• SW: Switch (controlling O) input terminal
• +: 12 / 24–48 VDC positive wire
• GND: 12 / 24–48 VDC ground wire

Troubleshooting

...

Web Interface Guide

Read the Shelly Plus 1 Web Interface Guide

Components and APIs

• This device
• All Shelly Devices and Services

Printed User Guide

Shelly Plus 1 Multilingual Printed User and Safety Guide.pdf

Compliance

• Shelly Plus 1 Multilingual EU Declaration of Conformity.pdf
• Shelly Plus 1 UK PSTI ACT Statement of Compliance.pdf
• Shelly Plus 1 x2 UK PSTI ACT Statement of Compliance.pdf
• Shelly Plus 1 AU NZ Certificate for Suitability.pdf

Installation Guides

• Using Shelly Plus 1 with Multiple Buttons to Control Lights