private void btApply_Click(object sender, EventArgs e)
        {
            try
            {
                if(cbMode.SelectedIndex == 0)
                {
                        comPort.DisplayData("("+DateTime.Now+")Sensor chuyen sang che do thuc ngu!", tbShow);
                        comPort.WriteData(confixcmd);
                        MessageBox.Show("Sent successful!", "Infomations");
                }
                if(cbMode.SelectedIndex == 1)
                {
                    if (cbPeriod.SelectedIndex != -1)
                    {
                            comPort.DisplayData("(" + DateTime.Now + ")Dieu chinh thoi gian gui du lieu dinh ky!", tbShow);
                            comPort.WriteData(confixcmd);
                            MessageBox.Show("Sent successful!", "Infomations");
                        }
                        else
                        {
                            MessageBox.Show("Not enough imformation","Error");
                        }
                 }
                if (cbMode.SelectedIndex == 2)
                {
                    if (cbtimecontrol.SelectedIndex != -1)
                    {
                        Database myDatabase = new Database();
                        int value = cbtimecontrol.SelectedIndex + 1;
                        int a = myDatabase.setTimeActor(value);
                        if(a == 1)
                            MessageBox.Show("Save successful!", "Infomations");
                        comPort.Time_control = myDatabase.getTimeActor();
                    }
                    else
                    {
                        MessageBox.Show("Not enough imformation", "Error");
                    }
                }
                if (cbMode.SelectedIndex == 3)
                {
                    if (cbSmokeThresh.SelectedIndex != -1)
                    {
                        comPort.WriteData(confixcmd);
                        comPort.DisplayData("(" + DateTime.Now + ")Thiet lap nong do nguong khoi", tbShow);
                        MessageBox.Show("Sent successful", "Imformation");
                    }
                    else
                    {
                        MessageBox.Show("Not enough imformation", "Error");
                    }
                }
                if (cbMode.SelectedIndex == 4)
                {
                    if (cbalarm.SelectedIndex != -1)
                    {
                        Database myDatabase = new Database();
                        int value = (cbalarm.SelectedIndex + 1)*5;
                        int a = myDatabase.setTimeAlarm(value);
                        if (a == 1)
                            MessageBox.Show("Save successful!", "Infomations");
                        comPort.Time_alarm = myDatabase.getTimeAlarm();
                    }
                    else
                    {
                        MessageBox.Show("Not enough imformation", "Error");
                    }
                }

            }
            catch { }
        }