How does Apple CarPlay work?

Question

Questions I have that I could not find answers:1. Is the iPhone rendering in in-car displays? What is the refresh rate?2. Does the iPhone have direct access to the CAN bus?3. What role do the infotainment units play? Do they play any role when CarPlay is in use? Processing data/running an Apple-provided OS? If it runs an Apple provided OS does it download this from the phone or is it preloaded? Can the phone push updates?4. How does iOS control the instrument cluster?

sturza · Accepted Answer

1. no, probably same as the HMI capability 2. no 3. forwarding and giving access to necesaary capabilities 4. it does not

bilsbie · Answer

I never understood how the wireless works. It seems like a weird mix of Wi-Fi and Bluetooth?