I am a sucker for home automation, here is my current setup:
1) Nest Thermostat (2nd gen) - in my dining room / kitchen area, controls all the temperatures.
2) 3x Nest Protects (2nd gen) - one on each floor (basement/main/upper), ties in with my thermostat to sense if I'm home /movement on floors in which the thermostat can't see us.
3) Belkin Wemo Light Switches & Smart Plugs - I've got three smart plugs ,two of which are insight plugs, that allow me to monitor energy usage on my home computer and entertainment centers, I've also got upwards of 11 Wemo light switches and dimmers installed throughout the house, which allow me to remotely activate/schedule lights when I'm away, or any other reason.
4) Philips Hue - All my exterior bulbs are RGB philips hue bulbs, as well as my main chandelier in the entry way. All outside facing lights are color tintable, which is great for holidays or directing people to find my place. I've also got some hue lightstrips in my home theater setup behind my tv, but they don't get used as often. Need to upgrade to a hue 2.0 bridge before I try to integrate that into any live viewing light setups.
5) Chamberlain Homelink enabled Garage doors - It will integrate with my eventual Tesla Model 3, and it also has an app to control and monitor the door state.
All the above are IFTTT compatible, so they will all speak to eachother.
Future purchases
Nest Cam Outdoor IQ (x2) for the front of the house.
Nest Cam Outdoor - for the backyard gate area.
Nest Hello Doorbell
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I'm still debating on which voice activation to run with, if I do amazon, google, or apple. I'm leaning towards apple since all my network appliances are airport extreme and expresses, it will probably integrate much better.
WOW. I want to get to that point one day. I have a smaller condo right now so there's really not much i can do aside from hue and a few wemo switches. How much of a pain in the ass was it setting up all of those things??