'Initialize the IGD sensor.'

def __init__(self, upnp, sensor_type, unit=''):

    self._upnp = upnp
    self.type = sensor_type
    self.unit = unit
    self.unit_factor = (UNITS[unit] if (unit is not None) else 1)
    self._name = 'IGD    {}'.format(SENSOR_TYPES[sensor_type][0])
    self._state = None
