brettcp
Wireless Carplay requires both Bluetooth and WiFi to work. It also requires GPS location data.
BT is used to connect/discover devices.
WiFi is the medium for audio/video transfer.
If you want to read more about it or watch the video from WWDC 2017 that talks about wireless Carplay and how to set up a device.
https://developer.apple.com/videos/play/wwdc2017/717/
It is interesting how the BT discovery and response messages are set up to trigger the WiFi access point and transfer the medium. Then again, I work with networks as a professional so my excitement might be bias.
