Control LG televisions from python

pylgtv.py

import serial
import re


class LGTV(object):
    """ Interface for serial control of LG Televisions """

    def __init__(self, port='/dev/ttyUSB0'):
        super(LGTV, self).__init__()
        self.port = port
        self.ser = serial.Serial(port, 9600)

    def _run_command(self, c1, c2, set_id, data):
        self.ser.write(bytes('%c%c %x %x\n' % (c1, c2, set_id, data), 'utf-8'))
        response = self.ser.read(10)
        exp = '%c\ %02x\ OK([\da-fA-F]{2})' % (c2, set_id)
        match = re.match(exp, response.decode())
        if match is None:
            raise Exception('Error running command')
        return match.group(1)

    def is_on(self):
        d = self._run_command('k', 'a', 1, 0xFF)
        print('Returned %s' % d)
        return int(d) == 1

    def power_on(self):
        self._run_command('k', 'a', 1, 1)

    def power_off(self):
        self._run_command('k', 'a', 1, 0)

    def view_tv(self):
        self._run_command('x', 'b', 1, 1 << 4)

    def view_dtv(self):
        self._run_command('x', 'b', 1, 0)

    def view_hdmi(self):
        self._run_command('x', 'b', 1, 0)