def tell_sender_to_stop(self, m):
        '''send a stop packet (if we haven't sent one in the last second)'''
        now = time.time()
        if now - self.time_last_stop_packet_sent < 1:
            return
        if self.log_settings.verbose:
            print("DFLogger: Sending stop packet")
        self.time_last_stop_packet_sent = now
        self.master.mav.remote_log_block_status_send(
            m.get_srcSystem(),
            m.get_srcComponent(),
            mavutil.mavlink.MAV_REMOTE_LOG_DATA_BLOCK_STOP,
            1)
send a stop packet (if we haven't sent one in the last second)