Wireless display Experimental

If the head unit has no usable browser, Carlink or CarLife but can receive screen casting (DLNA or Miracast), try this route: the head unit shows CarPlay’s picture only and can’t be touched; you operate CarPlay on the relay phone.

Experimental feature

It needs Android app 0.2.5 or later; download the latest version. The Linux relay has no wireless display output.

Choose DLNA or Miracast

Choose Wireless display on the setup guide’s Car display page or in Settings → Output, then one of:

Kind	For	Keep in mind
DLNA	Head units with a screen-casting receiver app	The head unit plays what the relay sends, a few seconds behind.
Miracast	Head units that receive a phone’s screen casting	Less delay; uses Wi-Fi Direct.

DLNA: connect the receiver

1. The head unit joins the relay phone’s hotspot, or both join the same Wi-Fi; then open the receiver app on the head unit.
2. In Settings → Output → Wireless display, tap Receiver and choose the head unit from the list. If it isn’t there, check the network and the receiver app, then tap Search again.

The relay keeps sending the picture to that receiver and retries when the receiver stops playing.

Miracast: start screen casting

1. In Settings → Output → Wireless display, allow Display over other apps, so CarPlay stays on the head unit while the relay is in the background.
2. Tap Open screen casting and choose the head unit in Android’s casting list.

Miracast and Carlink both use Wi-Fi Direct; most phones can use only one at a time. Miracast can also replace CarPlay’s own Wi-Fi Direct group, so use This phone’s hotspot or USB for CarPlay; the app offers to switch.

Operate CarPlay on the relay phone

With wireless display only, the relay phone shows CarPlay and takes touch, with a back button. While connected, Home offers Show CarPlay.

Sound

With Settings → Sound → CarPlay audio over the car’s Bluetooth off, every CarPlay sound (music, alerts, Siri and calls) goes to the head unit with the cast; DLNA plays it a few seconds late, like its picture. Siri and calls use the relay phone’s microphone. With the option on, sound plays from the iPhone over its Bluetooth link to the car.

Picture

• DLNA uses the car screen measured by the browser and saved, or the chosen car model’s screen, otherwise 16:9, at the size set in Settings → CarPlay picture → Resolution.
• Miracast uses the size Android negotiated with the head unit. The head unit receives what Android’s screen casting sends; these settings change CarPlay’s shape inside it, not its clarity. If the head unit stretches the cast picture to its screen, turn on Fill the screen so CarPlay shows in the right proportions.