Fail to add a sensor
Make sure that the Hub firmware is the latest version (Menu >>> Hubs >>> Hub Settings >>> Firmware Version >>> Click Check Update to check if the Hub firmware is the latest version).
Add a sensor without correct steps. Please re-add the device according to the instructions on the app.
The distance between the Hub and the sensor is too far. Please shorten the distance between the Hub and the sensor. Then try to add the sensor again.
There are too many sensors under this Hub. (The Hub can add up to 10 sensors at most)