David can't see his Google Home device and his Chromecast on his wifi network. Leo says if you're on the same network, and can see both, you should be able to see them. But Google Home uses Bluetooth to signal its presence online, so you have to turn on Bluetooth in order to see it, along with WiFi. You don't have to join it, but you do have to turn it on. You also have to look for Load Media Router Component Extension. Here's a how to, from ScooterX.