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The smallest, smartest & the most powerful Wi-Fi switch for your automation solution.

The smallest, smartest & the most powerful Wi-Fi switch for your automation solution.

Shelly 1 OS is suitable for everyone

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    Use the power of Mongoose OS to make your own application
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    Make your Arduino project live and usable in your automation project
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    Share your experience with developers over the world.
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    Use our REST API to connect Shelly1OS with your existing home automation system.
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    Shelly 1 OS support wide range of AC and DC power supply: 110-265V, 50/60Hz AC, 12V DC, 24 – 48V DC
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    Complies with the following EU standards:
    R&TTE 1999/5/WE, LVD 2006/95/WE, EMC 2004/108/WE, RoHS2 2011/65/UE, RE Directive 2014/53/EU
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    Mobile App Control
    Turn devices on/off directly from your smartphone or tablet.

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    Wi-Fi Connected
    Just connect Shelly to your Wi-Fi network and begin the ultimate experience of controlling your home with your phone

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    Home assistant compatible
    Control your appliance with your voice. The Shelly 1 OS are Google home and Amazon Echo Compatible
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    Weekly Scheduling
    Create custom daily schedules for your devices.

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    Following the Sunlight
    Shelly can automatically turn on/off based on the sunrise and sunset hours.

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    Up To 3500W
    With Shelly Plug you can control wide range of devices and appliances.

Shelly 1 pin-out


Shelly1 comes with a programming/debug header which can be used to flash alternative firmware on the device. It has an ESP8266 inside, with a 2MB flash chip. A USB-to-UART adapter is needed as well as a reliable 3.3V with at least 350 mA drive capability. The following diagram shows the device pinout and power source voltage selection jumper:


Shelly for developers


 Open to the world

We make Shelly devices open to the world and the developers. Shellys are secured but at the same time give everyone the opportunity to use them easily in new and existing projects.



With the embedded web server and the common HTTP commands Shelly can be made compatible with Vera, Fibaro, SmartThings, HomeSeer, Savant, HomeKit, etc.
Visit our REST API for developers, to create your own cloud solution.



Shelly has HTTP/UDP support.
Visit our forum for more details.

Shelly 1 fits everywhere



Shelly 1 OS dimensions are 41 x 36 x 17 mm.
You can install Shelly 1 into the wall under the power socket or a standard light switch.


Shelly 1 can be installed on a DIN into your electricity box, right next to the breakers.

The most intelligent device you can have


Shelly 1 has an integrated WEB interface with an easy On/Off, device management and secure OTA update.

You can set Weekly Schedules for On/Off
without the need of any additional equipment

Shelly 1 knows your location and allows control over your lights
based on the Sunrise and Sunset all year

Shelly 1 gives you high security and provides device access control

Shelly Cloud – One App – Unlimited Functionality



Install your Shelly 1 relay into the wall
under the power socket or a standard light switch.


Download and install the free mobile app
from Google Play or Apple® App Store.


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