This is the most common method for PX3 units where you have manually downloaded the update file (usually named mcu_dapin.bin or dmcu.img ). How To: MCU Update for 7.1 vertical screen head units
Ensure your unit is indeed a Rockchip PX3. You can verify this by tapping the "Android Version" multiple times in settings; if an "N" appears, it's Android 7.1 (Nougat); a "K" indicates Android 4.4 (KitKat). rkpx3 mcu update
Comprehensive Guide to RKPX3 MCU Updates for Android Car Stereos This is the most common method for PX3
Adding support for new CAN bus protocols to ensure steering wheel controls and air conditioning displays work correctly. if an "N" appears
Before attempting an update, you must identify your current version and gather the right tools.