Light motion sensor i "bedroom"

[Hausner]

Hi

I'm looking for ideas to place a motion detector to control the ceilinglight in a childrooom.

What I would like is a arduino with a relay controlled by a controller, in my case openhab, but, what I need is:

1. ability to be controlled by controller ON/OFF (got it covered)
2. ability to react on motion - how should this be done at nighttime, not turning on the light when the kid turns in bed? (NOT covered)
3. scheduled ON/OFF (got it covered)

Have you done anything similar, then I would appreciate some hints to get my project moving, as i'm stuck at #2