'Ensure the information from the DD-WRT router is up to date.
Return boolean if scanning successful.'

def _update_info(self):

    _LOGGER.info('Checking    ARP')
    url = 'http://{}/Status_Wireless.live.asp'.format(self.host)
    data = self.get_ddwrt_data(url)
    if (not data):
        return False
    self.last_results = []
    active_clients = data.get('active_wireless', None)
    if (not active_clients):
        return False
    clean_str = active_clients.strip().strip("'")
    elements = clean_str.split("','")
    self.last_results.extend((item for item in elements if _MAC_REGEX.match(item)))
    return True
