您可能会想考虑使用一个非阻塞的日志系统，以防止您的终端用户等待您记录数据。

You may want to consider using a logging system that is non-blocking, so that your end user never waits for you to log data.

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如果串口硬件运行正常，终端显示器等待，然后接收。如果有问题，错误信息显示在屏幕上。

If the serial port hardware is functioning correctly, the terminal displays WAITING and then RECEIVING. If there is a problem, an error message appears on the screen. .

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一种从调制解调器(数传机)到数据终端设备(dte)的信号，用来表明它已就绪，等待操作。

A signal from a modem (data set) to a DTE indicating that it is ready to operate.

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