Trigger MESH if WeMo Light Switch is switched on

MESH makes the world around you come to life. With 7 physical MESH 'tags' and an easy-to-use companion iOS app (free), the MESH system gives you the power to enhance your DIY projects with fun interactivity.
SmartThings unlocks a new world of possibilities by letting you use your smartphone to control locks, lights, electronics, and the everyday things around you—wherever you are.