The smart door and window sensor with lux measurement and lightning fast response.

Shelly Door / Window 2


Shelly Door/Window sensor uses your home WiFi network, no additional controllers are required.

Stay safe

Shelly Door/Window is going to remind you about open windows when you’re about to leave for work, go to sleep, or when it may rain.

Highly compatible

Compatible with Android, iOS, Amazon Alexa and Google Assistant.

Door sensor

Shelly Door/Window detects and reports the opening and closing of doors and windows.

Temperature sensor

Be aware of temperature fluctuations and keep your home comfortable at any time.

Light sensor

The device has an integrated LUX sensor.

Wire free

Simply place the sensor on your door or window frame and you are all set.

Monitor remotely

Monitor you home, no matter where you are via the Shelly Cloud app and your phone.

Why Shelly Door/Window

The lightning fast smart, door and window sensor.
Shelly Door/Window is designed to detect and report the opening and closing of doors and windows. Its compact design allows it to be easily installed on any door or window, and because of its lightweight, the sensor is nearly invisible.

Make your home safer

Shelly Door/ Window sensors will help you make your apartment or house safer by reminding you if you have any windows left open when going out.

Lightning fast response!

Shelly Door/ Window sensor detects and reports the opening and closing of doors and windows. When a door is opened, the sensor will immediately send a notification to your device.

A warm welcome home

Shelly Door/ Window can give a warm welcome to anyone entering your home. When placed on the front door, the sensor can be set to turn the lights on when the door is opened.

How It Works?

Attach your sensor to any door and window frame. Download the Shelly Cloud application and add your ShellyDoor/ Window. Now you will always be notified when your door or window is open.

More than 2 years of battery life

The very low power CPU combined with 2x CR123A battery allows Shelly Door/Window’s battery to last for more than 2 years thus making the device the open-close sensor with the longest battery life.

Anti-burglar protection

With Shelly Door/Window, you are aware and receive an instant notification if a door/window gets opened when you are not at home. Now you will be able to know if burglars are breaking in and immediately take action by calling the authorities


One application countless possibilities

With the best cloud service in the world, user-friendly interface, scenes, bulk control, and much more, the Shelly Cloud application allows you to control your home from anywhere. Each Shelly can be integrated and works with all other Shelly devices in the Shelly app.


For Developers

Shelly Door/Window 2 is open to the world and developers, it 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.

Device pinout ›

Visit our REST API for developers ›