This is a great idea, and we’ve been wanting to implement this for a while now! Unfortunately, there are no public API’s for Alexa, Google Assistant or Siri yet, so we don’t have a way to wake them. We’ll keep pushing!
An error occurred while saving the commentTidemann Norli commented
This works in the current version. The only problem is that when you are selecting wich google home mini to use you only see the product ID or something like that, instead of the name of the device. You can see what I mean by going to Tools > Chromecast. All of your google homes should be there.