Get UPS APC status plugged on serial port

# http://scratch-tales.blogspot.ru/
#!/usr/local/bin/python2.7
import sys
import os
import time
import termios

#------------------------------VAR------------------
ups_port = '/dev/tty00'


#--------------Open and setting UPS port------------
ups_ghost = open(ups_port, 'r+', 0)

com_port_attr = termios.tcgetattr(ups_ghost)

#iflag
com_port_attr[0] = termios.IGNBRK
#oflag
com_port_attr[1] = 0x0
#cflag - ignore CTS/RTS | enable receiver | 2400 |   8n1  (n and 1 are 0x0)
com_port_attr[2] = termios.CLOCAL | termios.CREAD | termios.B2400 | termios.CS8
#lflag
com_port_attr[3] = 0x0
#ispeed
com_port_attr[4] = termios.B2400
#ospeed
com_port_attr[5] = termios.B2400
# Do the dastardly deed
termios.tcsetattr(ups_ghost, termios.TCSANOW, com_port_attr)

ups_ghost.write('Y')
ups_ghost.flush()
ret = ups_ghost.readline().strip()
print "UPS status: ", ret

ups_ghost.write('P')
ups_ghost.flush()
ret = ups_ghost.readline().strip()
print "UPS load: ", ret

ups_ghost.write('L')
ups_ghost.flush()
ret = ups_ghost.readline().strip()
print "Line voltage: ", ret

ups_ghost.write('O')
ups_ghost.flush()
ret = ups_ghost.readline().strip()
print "Output voltage: ", ret

ups_ghost.write('B')
ups_ghost.flush()
ret = ups_ghost.readline().strip()
print "Battery voltage: ", ret

ups_ghost.write('f')
ups_ghost.flush()
ret = ups_ghost.readline().strip()
print "Battery status: ", ret

ups_ghost.close()