虚拟终端程序，可以将键盘输入传送到串口，再显示在屏幕,Virtual terminal program, keyboard input can be sent to the serial port, and then displayed on the screen

串口虚拟键盘，通过串口接收单片机数据，然后根据串口接收的数据来操作虚拟键盘-A serial port virtual keyboard, receive the single-chip microcomputer data via a serial port, and then according to the serial port the received data to operate the virtual keyboard