请使用串口调试助手（Baud 4800、数据位8、停止位1、效验位无）做为上位机来做收发试验 在调试助手字符串输入框中输入数字和字符，按发送按钮，然后观察接受窗口的变化。也可以用调试助手自动循环发送。 -Please use the serial port debugging assistant (Baud 4800, Data bits 8, stop bit 1, bit no efficacy) as the host computer to do send and receive test.* String in the input box debugging assistant numbers and characters, press the Send button, and then observe the window to accept the changes.* Debug Assistant can also be used to send automatic cycle.