PCB circuit boards are widely used in automotive electronics, including power control systems, safety control systems, body electronics systems, and communications.
In the future, automotive electronics will move toward the trend of big functions, namely: mobile communications, multimedia leisure, safe driving assistance (including automatic driving), ride comfort, energy saving (including electric vehicles), protection and preservation, all of which pose challenges to the PCB industry. At the same time, it also provides good development opportunities. For example, autonomous driving will bring large-scale applications of millimeter-wave radar, so the demand for high-frequency PCB boards for radars will be significantly increased, and the value is significantly higher than traditional PCB boards; BMS in electric vehicles is one of the core components. PCB board is one of the basic components of BMS and will benefit from the development of electric vehicles.
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Steps
1. Baidu search for "sofa manager" into the sofa network, download the sofa butler package; or directly click the link (http://app.shafa.com/shafa.apk) to download the sofa butler package. 
Copy the downloaded apk installation package to the U disk.
2. Open the commander A55C application store search, search to find a small Y game, download and install a small Y game; 
3. Insert the USB flash drive into the USB port of the TV. After entering the small Y game, enter the installation management page. 
4. After entering the installation package management, the system will detect all APK files in the U disk, find the installation package for the sofa housekeeper, and click directly to install. 
If the installation fails, restart the device and try again by following the steps. Still have questions please add the following sofa butler official QQ group.
Commander A55C TV installs third-party application tutorial through U disk
Installation process 1 Download the sofa butler package to the U disk and plug it into the commander A55C TV → 2 Application store search to install "Little Y game" → 3 Install the package management Enter the U disk to install → 4 Installation is complete
If you still cannot read the USB flash drive, you are advised to format the USB flash drive in FAT32 format first (if there is any other content in the USB flash drive, export it and then format it) or try another USB flash drive.
Watch the on-demand video with the commander A43C TV, recommend using pudding video; watch live TV, HDP broadcast recommended; more interesting content, please use Tencent video TV version, TV; Fun smart TV and box, more exciting content In the sofa net.