Mijia Door Window Sensor

The Mijia Door Window Sensor is designed to monitor whether a door, window or similar opening is open or closed. Its small two-part contact design can be used for entry alerts as well as everyday smart-home actions, such as turning on a light when a door opens.

The linked seller sources include both Mijia-branded and Aqara-branded legacy sensor listings, and the batch does not provide a trustworthy manufacturer model code for this canonical entry. Because those generations can use different radios and batteries, the storefront should not publish a protocol, model number or dimensions based on an assumed generation. The existing brand and product type are still useful.

The Mijia-specific source explicitly describes automatic control through the Mi Home app. A compatible gateway may be required depending on the hardware generation, and imported sensors can be region-specific.