Read the statement by Michael Teeuw here.
Pre-existing Google Home setup
I am looking into building a smart mirror within the next month and would like to have google home functionality integrated. I have been unable to find any information regarding a smart mirror using a pre-existing google home mini. I have only seen them using the google AIY voice kit. I am wondering if the same can be accomplished with my google home mini as has been done with the AIY kit.