The open window detection feature doesn't work well for me. Are there any plans to add sensors to your system?
@croman Open Window Detection is just a software feature, hence very unreliable.
If you are looking into proper sensors I recommend Aqara products. Since these are Zigbee* you will need a hub and a sensor.
Aqara E1 hub
Aqara Door and Window Sensor
*thread will be supported at later stage.