User variable to get Roller shutter level..

[javi77]

HI guys,hope this is the correct place to post..
i made an scene that roller shutter go down on specific time and lux level...the issue is
i need to know the level of the roller shutter before they go down...but i cant add them to the if block -(its seems that in the if block i cant user the roller shutter level-it can be user in do )...
any suggest how to ask for roller level in the it?
Thanks