通过串口读写数据

# coding:utf-8
import time,serial

ser = serial.Serial('COM3', 57600, timeout=10,parity=serial.PARITY_EVEN, rtscts=1)

i = 0
now = time.time()
print(ser.inWaiting())
# while ser.inWaiting() > 0:
while 1:
    s = ser.readline()
    i +=1
    # nows = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))
    nows = time.time()
    if nows > now + 60:
        break


#   data += ser.read(10)
# if data != '':
#   print (data)
    print(s)

print((i)/3)