Shelly 1

Shelly 1 is a small form factor smart switch with potential-free contacts, which allows remote control of electric appliances through a mobile phone, tablet, PC, or home automation system. It can work standalone in a local Wi-Fi network or it can also be operated through cloud home automation services.

Shelly 1 can be accessed, controlled and monitored remotely from any place where the User has internet connectivity, as long as the device is connected to a Wi-Fi router and the Internet.

It can be retrofitted into standard electrical wall boxes, behind power sockets and light switches or other places with limited space.

Shelly 1 has an embedded Web Interface which can be used to monitor and control the device, as well as adjust its settings.

Simplified internal schematics

Shelly 1 - Simplified internal schematics

Supported load types

  • Resistive (incandescent bulbs, heating devices)
  • Capacitive (capacitor banks, electronic equipment, motor start capacitors)
  • Inductive with RC Snubber (LED light drivers, transformers, fans, refrigerators, air-conditioners)

Basic wiring diagrams

IMPORTANT – All 240V electrical work and installations in Australia must be performed by a licensed electrician. The wiring diagrams below are for informational purposes only.

AC power supply
DC power supply

Wiring legend

Terminals Description
I Load circuit input terminal
0 Load circuit output terminal
SW Switch (controlling O) input terminal
12V 12 VDC positive terminal
L Live (110-240 V) terminal
N Neutral terminal
+ DC positive terminal
DC negative terminal


(1) Disconnect the power from the Shelly by turning off a breaker or other means.
(2) Restore power.
(3) Within the first minute, toggle a switch connected to the "SW" input on the Shelly 5 times on/off (10 total) or press and release momentary button 5 times.

Please make sure that you are running the latest firmware and try turning on the Shelly Cloud connection through the web interface.



Power supply AC: 110-230V ±10%, 50/60Hz
Power supply DC: 12V, 24 – 60V
Maximum load: Standard version – 16A / UL version – 15A
Device power consumption: < 1 W

Special functions

Dry contacts: Yes
Roller shutter mode: No
Device temperature protection: No
Overload protection: No
Power measurement: No
Working without a neutral wire: No


Control channels: 1 On/Off Relay Channel
Operational temperature: 0°C to + 40°C
Intelligent On/Off: Yes
Local and smart control: Yes
Sunrise/Sunset timer: Yes
Built-in weekly scheduler: Yes


Wi-Fi protocol: 802.11 b/g/n
Radio frequency: 2400 – 2500 MHz
Radio signal power: 1mW
Wireless range: up to 50 m outdoors and up to 30 m indoors (depending on the building materials)


Size: 41mm x 36mm x 17mm
Updated on May 28, 2023

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