code: def get_latlon(self, use_cached=True):
          
          device_json = self.get_device_json(use_cached)
          lat = device_json.get("dpMapLat")
          lon = device_json.get("dpMapLong")
          return (float(lat) if lat else None,
                  float(lon) if lon else None, )
docs: Get a tuple with device latitude and longitude... these may be None