Xiaomi Aqara Human Motion Sensor
Install on the Homey:
Because this sensor uses the Zigbee protocol, it can be directly linked to the Homey. So you do not need the Xiaomi Gateway. The developer Ted Boomsma has developed an APP that you can use.
The adding is done by logging in to the Homey and going to the device section. Then click on the plus sign (top right) and look for the Aqara sensor. You must then install an APP (if you do not already have it).