As an alternative, you might want to check out VLC Thing. You set it up on something like a Raspberry pi with speakers plugged into it. It shows up in Hubitat as a speech device. I have one that announces when door and window sensors are open, when a water leak is detected, etc. Once it is setup, you can have it say anything. There is no need to load it up with mp3s since I believe it uses Amazon's voice services to pull down the audio file. It also caches the file locally so that it doesn't have to reach out to the Amazon cloud when there are statements that get repeated (i.e. "The front door is open"). I know I have it working and I think I used the port here:
Download the Hubitat app
