I’ve used Tasker/AutoVera/AutoVoice in a similar way. It works very well. I’ve extended its functionality to my Moto 360 watch. Personally, I’m not a big fan of speaking my commands, but it does come in real handy when I’m driving. “Make sure the garage doors are closed”… or “show me the porch camera”.
It does take more work to set it up than a program like Imperihome, but with Tasker I’ve been able to marry several devices and services that usually don’t work together (zmodo cameras, vera lite, opensprinkler, raspberry pi, etc…).