'Initialize the sensor.'

def __init__(self, fstatus):

    self._name = 'fritz_netmonitor'
    self._fstatus = fstatus
    self._state = STATE_UNAVAILABLE
    self._is_linked = self._is_connected = self._wan_access_type = None
    self._external_ip = self._uptime = None
    self._bytes_sent = self._bytes_received = None
    self._max_byte_rate_up = self._max_byte_rate_down = None
