#!/usr/bin/python
import sys
import os
import time
import getopt
import socket
import ConfigParser
import struct
import binascii
ipaddress = str(sys.argv[1])
from pymodbus.client.sync import ModbusTcpClient
client = ModbusTcpClient(ipaddress, port=502)



resp= client.read_input_registers(5082,2,unit=1)
value1 = resp.registers[0]
value2 = resp.registers[1]

all = format(value2, '04x') + format(value1, '04x')
final = int(struct.unpack('>i', all.decode('hex'))[0]*-1)

f = open('/var/www/html/openWB/ramdisk/wattbezug', 'w')
f.write(str(final))
f.close()