private void ReceiveThread()
    {
        while (true)
        {
            runThread.WaitOne(Timeout.Infinite);
            while (true)
            {
                try
                {
                    string msg = serialPort.ReadLine();
                    this.Invoke(this.m_DelegateAddToList, new Object[] { msg });
                }
                catch
                {
                    runThread.Reset();
                    break;
                }
            }
        }
    }

private void AddToList(string msg)
    {

        string[] words = msg.Split(' ');
        foreach (string word in words)
        {

            txtid.Text = words[0];

            if (txtid.Text == "NH1" && words.Length == 3)
            {
                txtInput.Text = words[1];
                txtSR.Text = words[2];

            }

        }

        //draw grafick
            if (zedGraphControl1.GraphPane.CurveList.Count <= 0)
                return;
            LineItem curve1 = zedGraphControl1.GraphPane.CurveList[0] as LineItem;
            curve1.Line.Width = 1.25F;
            if (curve1 == null)
                return;
            // Get the PointPairList
            IPointListEdit list1 = curve1.Points as IPointListEdit;
            if (list1 == null)
                return;
            double d;
            double.TryParse(words[1], out d);
            list1.Add(timedt, d);
            zedGraphControl1.AxisChange();
            // Force a redraw
            zedGraphControl1.Invalidate();
            timedt++;
    }

if (serialPort.IsOpen == true)
            {
                //tutup koneksi ke database
                //cs.Close();
                runThread.Reset();

                cmdBaudRate.Enabled = true;
                cmdSerial.Enabled = true;
                serialPort.Close();

            }