Python seri port haberleşmesi

#!/usr/bin/python
#-*- coding:utf-8 -*-

###############################################################################
# Bu betik örnek için hazırlanmıştır amac seri porttan gelen verilerin okunması
# 22.03.2011
# Hüseyin Özdemir
# husonet
###############################################################################

import serial

SERIAL_PORT     = '/dev/ttyUSB0'
SERI_BAUDRATE   = 115200
SERI_BYTESIZE   = 8
SERI_PARITY     = 'N'
SERI_STOPBITS   = 1
SERI_TIMEOUT    = 0.2
SERI_BUFFER_SIZE= 1024

#------------------------------------------------------------------------------
# Bağlantı kur
def seriBaglan():
    bag             = serial.Serial()
    bag.port        = SERIAL_PORT
    bag.baudrate    = SERI_BAUDRATE
    bag.bytesize    = SERI_BYTESIZE
    bag.parity      = SERI_PARITY
    bag.stopbits    = SERI_STOPBITS
    bag.timeout     = SERI_TIMEOUT
    bag.open()
    return bag

if __name__ == "__main__":
    try:
        bag = seriBaglan()
        while 1:
            print bag.readline()
    except:
        pass
    finally:
        bag.close()

su -
usermod -aG dialout KULLANICI  # yada adduser KULLANICI dialout
chmod a+rw /dev/ttyUSB0