MissionPlanner.MAVLinkInterface.SendSerialControl C# (CSharp) Method

        public void SendSerialControl(SERIAL_CONTROL_DEV port, ushort timeoutms, byte[] data, uint baudrate = 0,
            bool close = false)
        {
            mavlink_serial_control_t ctl = new mavlink_serial_control_t();

            ctl.baudrate = baudrate; // no change
            ctl.device = (byte) port;
            ctl.timeout = timeoutms;
            ctl.data = new byte[70];
            ctl.count = 0;
            if (close)
            {
                ctl.flags = 0;
            }
            else
            {
                ctl.flags = (byte) SERIAL_CONTROL_FLAG.EXCLUSIVE; // | SERIAL_CONTROL_FLAG.MULTI);
            }

            if (data != null && data.Length != 0)
            {
                int packets = (data.Length/70) + 1;
                int len = data.Length;
                while (len > 0)
                {
                    if (packets == 1)
                        ctl.flags |= (byte) SERIAL_CONTROL_FLAG.RESPOND;

                    byte n = (byte) Math.Min(70, len);

                    ctl.count = n;
                    Array.Copy(data, data.Length - len, ctl.data, 0, n);

                    // dont flood the port
                    System.Threading.Thread.Sleep(10);

                    generatePacket((byte) MAVLINK_MSG_ID.SERIAL_CONTROL, ctl);

                    len -= n;
                    packets--;
                }
            }
            else
            {
                if (!close)
                    ctl.flags |= (byte) SERIAL_CONTROL_FLAG.RESPOND | (byte) SERIAL_CONTROL_FLAG.MULTI;

                generatePacket((byte) MAVLINK_MSG_ID.SERIAL_CONTROL, ctl);
            }
        }