private void button_getAll_Click(object sender, EventArgs e)
{
serialPort1.WriteLine(textBox_getScustom.Text);
SetText(textBox_getScustom.Text + "\r\n");
Thread.Sleep(100);
serialPort1.WriteLine(textBox_getLcustom.Text);
SetText(textBox_getLcustom.Text + "\r\n");
while (serialPort1.BytesToRead > 0) Thread.Sleep(100);
serialPort1.WriteLine(textBox_getDcustom.Text);
SetText(textBox_getDcustom.Text + "\r\n");
}