def tell_sender_to_start(self):
        '''send a start packet (if we haven't sent one in the last second)'''
        now = time.time()
        if now - self.time_last_start_packet_sent < 1:
            return
        self.time_last_start_packet_sent = now

        if self.log_settings.verbose:
            print("DFLogger: Sending start packet")

        target_sys = self.log_settings.df_target_system
        target_comp = self.log_settings.df_target_component
        self.master.mav.remote_log_block_status_send(
            target_sys,
            target_comp,
            mavutil.mavlink.MAV_REMOTE_LOG_DATA_BLOCK_START,
            1)
send a start packet (if we haven't sent one in the last second)