_serialPort = new SerialPort("COM2", 9600, Parity.None, 8); if (!_serialPort.IsOpen) { _serialPort.Open(); } _serialPort.DataReceived += new SerialDataReceivedEventHandler(_serialPort_DataReceived); txtQty.Text = _serialPort.ReadExisting(); if (_serialPort.IsOpen) { _serialPort.Close(); }
var
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