Hexadecimal processing: import serial # Import module try : Get a list of available serial ports: import serial # Import module import _ports Ser.close() # Close serial port except Exception as e: Ser=serial.Serial(portx,bps,timeout= timex) # Open the serial port and get the serial object # time-out,None: Always wait for the operation, 0 to return the request result immediately, and the other values are waiting time-out.(In seconds) # Port, GNU / Linux Upper/ dev / ttyUSB0 Wait or Windows Upper COM3 etc. Simple serial port program implementation: import serial # Import module try : Two CH340 (TTL transfer serial module) are connected to PC serial port and interact with each other through Python: pyserial module encapsulates python's access to serial ports, providing a unified interface for the use of multiple platforms. Serial port is a very general equipment communication protocol on computer. This communication mode uses fewer data lines and can save communication cost in long distance communication, but its transmission speed is lower than that of parallel transmission. Serial communication is a kind of communication mode between peripherals and computers, which transmits data bit by bit through data signal lines, ground lines, control lines, etc.
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