python与串口通讯python代码

# -*- coding:utf-8 -*- 
# -Author-= JamesBen
# Email: [email protected] 

import serial
import re

serialPort = "COM4"  # 串口
baudRate = 9600  # 波特率
ser = serial.Serial(serialPort, baudRate, timeout=0.1)
#print("参数设置：串口=%s ，波特率=%d" % (serialPort, baudRate))


while 1:
    str1 = ser.readline()
    if "Present Length is:" in str() :

        #long = str(re.findall(r"b'(.*?)'", str(str1), flags=0))
        print(str1)
        #print(str1)

ser.close()