WORK IN PROGRESS! RTCM message for injecting into the onboard GPS
                (used for DGPS)

                flags                     : LSB: 1 means message is fragmented (uint8_t)
                len                       : data length (uint8_t)
                data                      : RTCM message (may be fragmented) (uint8_t)

def gps_rtcm_data_send(self, flags, len, data, force_mavlink1=False):
                '''
                WORK IN PROGRESS! RTCM message for injecting into the onboard GPS
                (used for DGPS)

                flags                     : LSB: 1 means message is fragmented (uint8_t)
                len                       : data length (uint8_t)
                data                      : RTCM message (may be fragmented) (uint8_t)

                '''
                return self.send(self.gps_rtcm_data_encode(flags, len, data), force_mavlink1=force_mavlink1)