code: def mavlink_packet(self, m):
          
          mtype = m.get_type()
          if mtype == 'GPS_RAW':
              (self.lat, self.lon) = (m.lat, m.lon)
          elif mtype == 'GPS_RAW_INT':
              (self.lat, self.lon) = (m.lat / 1.0e7, m.lon / 1.0e7)
          elif mtype == "VFR_HUD":
              self.heading = m.heading
              self.alt = m.alt
              self.airspeed = m.airspeed
              self.groundspeed = m.groundspeed
docs: handle an incoming mavlink packet