Shelly 1

Device Identification

• Device name: Shelly 1
• Device model: SHSW-1
• Device SSID: shelly1-XXXXXX

Short Description

The Shelly 1 is a compact smart switch featuring potential-free contacts, 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.

With internet connectivity, users can access, control, and monitor the device from anywhere, provided it remains connected to a Wi-Fi router and the Internet.

Designed for easy retrofitting, the Shelly 1 fits into standard electrical wall boxes, behind power outlets, light switches, or other tight spaces.

It includes 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

• 1 switch/button input on screw terminal
• 1 potential-free contacts relay input on screw terminal
• 2 power supply inputs on screw terminals: N (+) and L (-)

Outputs

• 1 potential-free contacts relay output 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. Exercise caution during installation or maintenance.

Connectivity

• Wi-Fi

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)

Specifications

Category	Type	Value
Physical	Size (HxWxD)	36 × 41 × 17 mm / 1.42 × 1.61 × 0.67 in
	Weight	—
	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	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 / 24–60 VDC / 12 VDC ±10%
	Power consumption	< 1 W
Output circuits 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
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

Terminals

• I: Load circuit input terminal
• O: Load circuit output terminal
• SW: Switch (controlling O) input terminal
• L: Live (110–240 VAC) terminal
• N: Neutral terminal
• +: DC positive terminal
• -: DC negative terminal

Wires

• L: Live (110–240 VAC) wire
• N: Neutral wire
• +: 12 / 24–60 VDC positive wire
• -: Negative wire

Troubleshooting

...

Web Interface Guide

Read the Shelly 1 Web Interface Guide

Components and APIs

• This device
• All Shelly devices and services

Printed User Guide

Printed User Guide – English, Deutsch, Italiano, Español, Português, Français

Compliance

Shelly 1 Multilingual EU Declaration of Conformity

Installation Guides

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