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#!/usr/bin/python

import argparse

import serial

import struct

import sys

def main():

parser = argparse.ArgumentParser()

parser.add_argument('device')

parser.add_argument('index')

parser.add_argument('state')

args = parser.parse_args()

if isinstance(args.state, str):

args.state = args.state.lower()

if args.state in [ 0, 'false', 'f', 'off' ]:

state = False

elif args.state in [ 1, 'true', 't', 'on' ]:

state = True

else:

raise RuntimeError('Cannot parse state %r' % args.state)

state = not state # XXX: I use NC. This should be configurable.

if args.index == 'all':

index_list = range(1, 9)

else:

index_list = [int(args.index) + 1]

relay = serial.Serial(args.device, 9600)

for index in index_list:

relay.write(struct.pack('BBB', 255, index, int(state)))

relay.close()

if __name__ == '__main__':

main()