4. Program update
4.1 Touch screen program update
Note: The U disk uses the USB2.0 interface and has a capacity smaller than 16GB.
The format of U disk is FAT32.
Insert the USB drive with updated files into the USB interface on the back of the touch
screen, wait for the screen to display the upgrading interface, wait for the program
upgrade to complete, and then unplug the USB drive.
4.2 Controller program update
Click on the "Home" → "System Settings" → "System Upgrade" button to enter
the controller update interface, as shown in the following figure
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