Lutron FAQ (http://www.casetawireless.com/Pages/FAQs.aspx) says that "OK Google" commands are supported starting with Caseta app v3.1. I've got v4.0 and I can't seem to get the voice actions to work.
I also don't see lutron listed here:
Is the FAQ page wrong, has this functionality been removed? If not, are there any tricks to get it working?