Put this on the facebook user group but am adding this here in case there are other people with knowledge of this setup.
Now in ewelink scenes using zigbee devices you can actually trigger a scene based on the "lack of motion" from a motion sensor which is great. This means potentially you can turn off lights or other devices when a room is empty.
However it is not documented how long the "inactivity" or "lack of motion" is before
the scene is triggered.
Ideally you'd want to set this time yourself. So for instance you could turn of lights in a room after about 15 minutes of no activity. You don't want an instant trigger that turns lights off whenever you stop moving ! Like when you sit and rest etc !