private void button_setT_Click(object sender, EventArgs e)
{
serialPort1.WriteLine(textBox_setTcustom.Text);
SetText(textBox_setTcustom.Text + "\r\n");
Thread.Sleep(100);
if (checkBox_autoTime.Checked == true) textBox_setT.Text = getDateString();
serialPort1.WriteLine(textBox_setT.Text);
SetText(textBox_setT.Text + "\r\n");
}