import time
import ctypes
import serial
import sys
from binascii import hexlify

ser = serial.Serial(

    port='/dev/ttyS0',
    baudrate=9600,
    parity=serial.PARITY_NONE,
    stopbits=serial.STOPBITS_ONE,
    bytesize=serial.EIGHTBITS,
    timeout=1,
    dsrdtr=False
)
counter = 0

if (ser.isOpen() == False):
        ser.open()

#Flush before receiving or sending any data
ser.flushInput()
ser.flushOutput()

while 1:
    x = ser.read()
    print (hexlify(x))
    time.sleep(0.3)