Relay controller CLI for controlanything.com R8x

gistfile1.py

#! /usr/bin/env python

# https://s3.amazonaws.com/assets.controlanything.com/manuals/R4xR8xPro.PDF
# Example usage to turn on relay index 1 3 and 6:
#   ./relay.py --on 1 3 6

import serial
import time

class Relay(serial.Serial):

    def begin(self):
        self._exc(248) # all listen

    def turnOn(self, index):
        self._exc(index+8)

    def turnOff(self, index):
        self._exc(index)

    def turnAllOn(self):
        self._exc(30)

    def turnAllOff(self):
        self._exc(29)

    def toggle(self, index): # toggle seems buggy, let's not use
        relay._exc(46)
        relay.write(chr(index))

    def status(self, index):
        if index == None:
            self._exc(24)
        else:
            self._exc(index+16)
        return ord(self.read())

    def _exc(self, cmd):
        time.sleep(0.01)
        self.write(chr(254)) # enter command mode
        time.sleep(0.01)
        self.write(chr(cmd))
        self.flush()

if __name__ == '__main__':
    import argparse

    parser = argparse.ArgumentParser(description='Relay controller R8x')
    parser.add_argument('--port', type=str, help='serial port', default='/dev/ttyUSB0')
    parser.add_argument('--baud', type=int, help='baud rate', default=9600)
    parser.add_argument('--on', type=int, nargs="*", help='turn relay index(s) on')
    parser.add_argument('--off', type=int, nargs="*", help='turn relay index(s) off')
    parser.add_argument('--status', type=int, nargs="*", help='read status of relays')
    parser.add_argument('--raw', type=int, nargs="*", help='send raw commands')
    parser.add_argument('--read', help='read byte after commands')

    args = parser.parse_args()

    relay = Relay(args.port, args.baud, timeout=1)

    if type(args.on) == list:
        if len(args.on) == 0:
            relay.turnAllOn()
        else:
            for index in args.on:
                relay.turnOn(index)

    if type(args.off) == list:
        if len(args.off) == 0:
            relay.turnAllOff()
        else:
            for index in args.off:
                relay.turnOff(index)

    if type(args.status) == list:
        if len(args.status) == 0:
            print relay.status(None)
        else:
            for index in args.status:
                print relay.status(index)

    if type(args.raw) == list:
        for cmd in args.raw:
            relay._exc(cmd)
            time.sleep(.1)

    if args.read:
        try:
            print ord(relay.read())
        except TypeError:
            print 'Nothing to read'

    relay.close()