Hi there, today I made a video to show how far you can place a sensor in the ZigBee network and still be in touch with the Xiaomi Gateway.

I am using this Xiaomi Gateway:

https://www.banggood.com/Original-Xiaomi-Upgrade-Smart-Home-WiFi-Remote-Control-Multi-functional-Gateway-p-1047282.html?rmmds=detail-top-buytogether-auto__3

And this door sensor:

https://www.banggood.com/Original-Xiaomi-Intelligent-Door-Window-Sensor-Control-Smart-Home-Suit-Kit-Accessory-p-1017541.html?rmmds=detail-top-buytogether-auto__2&cur_warehouse=CN

I have the gateway placed in the middle of my house so to say, right in the staircase.