'Download and parse JSON from OHM.'

def refresh(self):

    data_url = ('http://%s:%d/data.json' % (self._config.get(CONF_HOST), self._config.get(CONF_PORT)))
    try:
        response = requests.get(data_url, timeout=30)
        self.data = response.json()
    except requests.exceptions.ConnectionError:
        _LOGGER.error('ConnectionError:    Is    OpenHardwareMonitor    running?')
