This hub system a looks a bit complicated , why not do it by building WiFi into the zappi? If the Amazon echo can do it without even having a screen.....
Does WiFi go through external walls very well? Also would be dependent on distance between Zappi and router. The frequency of the hub to Zappi communication is 868MHz instead of 5GHz for WiFi. This would allow it to go through external walls and allow longer range.
