Solve The Problem
The touch screen will automatically send the debug to the printer every time it is turned on, so that every time the device is turned on, the printer will automatically print a series of system information. Through the unique function of the serial port of the printer that is closed by default, the data on the control terminal is automatically sent to the serial port and the For the printing problem, combined with the command of the printer to open the serial port, add this command in front of the data that needs to be printed each time, so as to avoid the BUG that exists in the serial port of the control terminal device itself.
