Python 串口读写的实现方法

pip install pyserial-3.1.1-py2.py3-none-any.whl 

import serialfrom time import sleepdef recv(serial):  while True:    data = serial.read_all()    if data == '':      continue    else:      break    sleep(0.02)  return dataif __name__ == '__main__':  serial = serial.Serial('COM5', 9600, timeout=0.5) #/dev/ttyUSB0  if serial.isOpen() :    print("open success")  else :    print("open failed")  while True:    data =recv(serial)    if data != b'' :      print("receive : ",data)      serial.write(data) #数据写回