Lutron Director of Product Management Matt Swatsky told me in a briefing last week that HomeKit also allows you to define “Rooms” (all the controlled lights in a given room) and “Zones” (all the controlled lights in groups of Rooms). This enables the Caseta system to turn the lights in the living room on or off without impacting the lights in the rest of the house.
If you’d like to know the status of an individual light, you can ask Siri that as well. Or you can ask Siri to set any of your lights controlled by Caseta dimmers to a certain percentage of brightness. Finally, Caseta can also be integrated with smart thermostats from Honeywell and Nest, and Lutron has a Caseta channel on IFTTT.
Read more: http://www.techhive.com/article/2929733/lutrons-caseta-lighting-controls-are-now-mostly-compatible-with-apples-homekit.html