We are planning to involve interactivity in our video installations with HD222 players so that when people enter the room the volume level increases, and if the room is empty volume goes back to the original level.
Since people who enter the room might sit on a couch and watch videos for an hour without moving a lot it would be important that the presence detection is very exact.
Can you recommend any brands or vendors of motion and presence detectors that work well with the GPIO port of the HD222 and could solve the problem?
I found http://www.intelli-sign.com/ and http://www.hms-electronics.com/ , but not sure how exact they work.
Any help would be appreciated!
