The best Wi-Fi door/window sensors for Home Assistant

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A digital illustration of a storm approaching an open window.

In the realm of smart homes, the choice of communication protocol—whether it be Zigbee, Z-Wave, or Wi-Fi—can significantly impact the efficiency and functionality of your setup. Despite the robust integration and popularity of Zigbee and Z-Wave within the Home Assistant ecosystem, Wi-Fi remains a prevalent choice for certain smart devices. This guide zeroes in on the top Wi-Fi door/window sensors compatible with Home Assistant, an area where Wi-Fi's use isn't dictated by necessity, such as the bandwidth demands of security cameras, but rather as a convenient option for those wishing to leverage their existing Wi-Fi network without the need for additional adapters.


The Limited Selection

Wi-Fi door/window sensors, simple in their operation, communicate open or closed states with minimal data transmission, bypassing the need for the bandwidth required by more data-intensive devices. However, their selection is notably limited compared to the abundance of Zigbee devices, as highlighted in our comparative analysis here. Personal preference leans towards utilizing an existing Zigbee network for its tailored suitability, although this guide acknowledges the unique advantages Wi-Fi sensors provide for those preferring or limited to Wi-Fi.

Wi-Fi Door/Window Sensors: A Hub-Free Solution

Wi-Fi door/window sensors stand out for their direct connectivity to your Wi-Fi network, eliminating the need for a dedicated hub. This straightforward approach does come with its caveats:

Shelly Door/Window 2: Unmatched Endurance and Functionality

Shelly emerges as the premier choice for Wi-Fi-enabled smart devices, including sensors. The Shelly Door/Window 2 sensor not only monitors the open or closed status but also integrates temperature and light sensing capabilities, offering a multifaceted device solution. While superior in functionality to Zigbee alternatives, its price point of approximately US$28 reflects the added value, excluding the cost of the required but not included CR123A batteries. Despite the higher upfront cost, its two-year battery life and compatibility with Home Assistant through the ShellyForHASS custom component make it a compelling option. This integration enables local device management without the need for a cloud connection, ensuring swift and secure operation.

SONOFF DW2-WI-FI: A Contender with Limitations

The SONOFF DW2-WI-FI sensor represents a potential alternative, boasting up to three months of battery life from two AAA batteries and a more forgiving placement tolerance between the magnet and sensor. However, its reliance on cloud connectivity for integration with Home Assistant through the SonoffLAN custom component introduces potential delays and necessitates constant internet access. Coupled with its limited availability, primarily through AliExpress, the SONOFF DW2-WI-FI falls short as a competitive option against the Shelly Door/Window 2.

In conclusion, while the market for Wi-Fi door/window sensors compatible with Home Assistant is notably smaller than for Zigbee or Z-Wave devices, the Shelly Door/Window 2 stands out as the best choice for those prioritizing Wi-Fi connectivity. Its robust feature set, reliable performance, and seamless integration with Home Assistant position it as the unrivalled option for enhancing your smart home's security and monitoring capabilities.

A portrait photo oif Liam Alexander Colman, the author, creator, and owner of Home Assistant Guide wearing a suit.

About Liam Alexander Colman

is an experienced Home Assistant user who has been utilizing the platform for a variety of projects over an extended period. His journey began with a Raspberry Pi, which quickly grew to three Raspberry Pis and eventually a full-fledged server. Liam's current operating system of choice is Unraid, with Home Assistant comfortably running in a Docker container.
With a deep understanding of the intricacies of Home Assistant, Liam has an impressive setup, consisting of various Zigbee devices, and seamless integrations with existing products such as his Android TV box. For those interested in learning more about Liam's experience with Home Assistant, he shares his insights on how he first started using the platform and his subsequent journey.

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