- 1950's: Electro-mechanical
http://blog.modernmechanix.com/2006/12/15/push-button-manor/
- 1970's: Mini-computers
http://www.cs.cmu.edu/~coke/
- 1980's:
Internet Refrigerator – a Sun IPX (?) with serial interface to an analog temperature chip (LM???).
TW523 & the CP290
- 1990's
http://en.wikipedia.org/wiki/Trojan_room_coffee_pot
CM11A
http://www.misterhouse.com/
- 21 Century:
Cm15A
Insteon, UPB,Z-Wave