I installed google 'Assistant' in my new camper's wall tablet. I then raised the volume so I could hear it and now I can speak to my camper. Only when I raised the volume did I know it was listening. The wall tablet is a google tablet so gaining access to the controls is a swipe down, or use of the 'Settings' app.
I can ask it about the weather and set reminders and such. I can also turn lights on/off at my home... although there's little value since when we're camping we'd not need them on at our house.
Unfortunately, turning lights on/off in the camper is only possible if I use ac outlet lamps.
Before anything like this works, you must connect your tablet to the internet and that requires using 'Settings' app. Does JayVoice use the JayCommand app? If so, you may need to visit the Google Playstore and update it... along with any other apps installed.