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Com port always interrupts automatically.
The communication port is set incorrectly.

The reason why the com port is always automatically interrupted is that the parameters of the communication port are set incorrectly. It is necessary to ensure that the communication parameters are consistent, and the communication rate, data length, parity and stop bit settings are consistent.

COM port generally refers to serial port. Serial interface is called serial port for short, also called serial communication interface or serial communication interface is an extended interface using serial communication mode.