![]() Many drivers discovered that starting from scratch in the car typically restores Android Auto if an app bug does not cause the broken connection. Connection problems are pretty common in the Android Auto world, and more often than not, the generic workarounds (which include trying out new cables, reinstalling Android Auto, or clearing the data and the cache) don't produce any improvements. Sure enough, many users found out the hard way that this isn't always the case. The method might seem a little complicated at first, but it makes perfect sense, given the final purpose is providing a stable and reliable connection between the phone and the head unit. In the case of Android Auto wireless, the Bluetooth connection handles the voice calls, while the music and apps rely on Wi-Fi Direct. In summary, if your car supports only the wired mode, the cable connection is for music and apps, and Bluetooth is for calls. This is why the Wi-Fi option must be enabled on your phone when using wireless Android Auto. If your car supports the wireless version of Android Auto, the music and the rest of the data (such as for running apps) are sent to the head unit using Wi-Fi Direct. Most cars connect to phones via Bluetooth for phone calls and music playback, so Android Auto uses this option to handle the HFP. In theory, Google could drop the need for Bluetooth entirely, but Android Auto continues to use it as a signal to the head unit that the connection is active. By design, Bluetooth lacks the necessary bandwidth to render audio and video in the car, so Android Auto must turn to extra connection methods to work properly (hence the need for a cable or Wi-Fi in the case of a wireless connection). As such, the application can load correctly when the wireless mode is available.Īndroid Auto uses Bluetooth specifically for phone calls via the Hands-Free Protocol. Android Auto uses this method to tell the head unit that the connection between the phone and the receiver is running. This doesn't make much sense, right? Given a cable connection is already available, why is Android Auto asking for Bluetooth?įirst and foremost, you must understand how Bluetooth works. Unsurprisingly, people are very confused over the need to keep Bluetooth on all the time, especially when running Android Auto via a cable. If you disable Bluetooth, Android Auto can't launch, so you might see a message on the screen to enable this wireless connection option to load the app. Regardless of the Android Auto version available in the car, the application always requires Bluetooth to be enabled on the smartphone. ![]() Once everything is configured correctly, you can run Android Auto without a cable if the car supports the wireless mode. ![]() The wireless version originally requires a cable connection as well, as it needs to conduct the first configuration with a direct connection between the phone and the head unit. The wired version offers a plug-and-play experience, as you just connect the smartphone to the car using the integrated USB port, and Android Auto should launch the initial setup screen.
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