SerialPort port = new SerialPort(); if (sp.IsOpen) { sp.Close(); } sp.PortName = "COM14"; sp.BaudRate = 9600; sp.Parity = Parity.None; sp.DataBits = 8; sp.StopBits = StopBits.One; sp.Handshake = Handshake.XOnXOff; sp.DtrEnable = true; sp.RtsEnable = true; sp.Open(); if (!sp.IsOpen) { MessageBox.Show("Serial port is not opened"); return; }
var
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