How to Repurpose an Old Android Tablet as a Car Dash Display

A new, simple method is gaining traction among tech-savvy drivers. It allows them to repurpose old Android tablets as full-featured car dashboard displays. This approach provides a cost-effective alternative to expensive factory-installed infotainment systems. The process leverages existing Android Auto technology.

According to reports from tech specialists, the setup requires minimal hardware. Users need an old Android tablet, a mounting solution, and a specific software application. The core functionality mirrors a smartphone’s Android Auto interface onto the larger tablet screen. This grants access to navigation, music, and communication apps while driving.

Headunit Reloaded: The Core Software Solution

The key to this transformation is an app called Headunit Reloaded Emulator (HUR). This software creates an Android Auto host environment on the tablet. It effectively tricks your phone into thinking the tablet is a car’s built-in head unit. The app is available for a small fee on the Google Play Store.

Using HUR requires connecting an Android phone to the tablet. The phone performs all the processing and runs the Android Auto apps. The tablet acts solely as the display and touch interface. This can be done through a wired USB connection or wirelessly via a Wi-Fi hotspot. Both methods have their advantages regarding stability and battery life.

Step-by-Step Wired Connection Guide

The wired method is often more reliable for a stable connection. First, mount the Android tablet securely in your vehicle using a suitable holder. Next, connect the tablet to your Android phone using an On-The-Go (OTG) USB cable. This special cable allows the tablet to host the connection.

On your phone, a notification will appear after connecting. Select “File Transfer” or “Android Auto” for the USB usage. Ensure the phone controls the connection, not the tablet. Then, open the HUR app on the tablet and grant it necessary permissions. The Android Auto interface from your phone should then appear on the tablet’s screen.

Setting Up a Wireless Connection

For a cable-free setup, the wireless method is preferable. This requires using your phone’s Wi-Fi hotspot functionality. Start by enabling the hotspot on your phone and connecting the tablet to it. This creates a local network for the two devices to communicate.

Next, enable developer mode within the Android Auto settings on your phone. This unlocks the “Start Head Unit Server” option. Once activated, open the HUR app on the tablet and select the “Wireless” connection mode. The app will search for and connect to your phone, displaying the interface without any cables.

Audio and Practical Considerations

A crucial point involves audio output. The tablet’s built-in speakers will likely be insufficient for road noise. For better sound, connect the tablet to your car’s stereo system. This can be done via Bluetooth or a physical auxiliary cable if your car has a 3.5mm input.

The resulting interface will be familiar to any Android Auto user. It typically shows a split screen with navigation and media controls. All apps compatible with Android Auto will be accessible. Drivers should always set up their destination and preferences before starting to drive to minimize distractions.

This innovative use of old technology demonstrates Android’s flexibility. The Android Auto tablet project offers a smart way to modernize older vehicles. It provides a feature-rich driving experience without a significant financial investment.

Dropping this nugget your way

What is the best tablet for this project?

Most modern Android tablets running Android 7.0 or later will work. The key factors are screen brightness for daylight visibility and processing power for a smooth experience. Older, mid-range devices often suffice.

Does this method work with iPhones?

No, this specific guide is for Android phones and tablets. The Headunit Reloaded app is designed to work with the Android Auto protocol, which is different from Apple’s CarPlay system used by iPhones.

Is it legal to use a tablet as a car display?

Laws vary by region. Generally, having a display is legal as long as it does not obstruct the driver’s view. The critical legal point is that the driver must not interact with the screen while the vehicle is in motion, similar to phone use laws.

Will this drain my phone’s battery quickly?

Yes, especially with the wireless method. For longer trips, it is highly recommended to have your phone plugged into a car charger to maintain battery life while it powers the Android Auto experience.

Are there any simpler alternatives?

Yes, apps like AutoZen provide a custom car dashboard interface that runs directly on the tablet without needing a phone connection. However, these do not use the official Android Auto system and may have limited app support.

Trusted Sources
Associated Press, Reuters