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C# code:
#region ´ò¿ª¶Ë¿Ú
private void OpenCOM()
{
try
{
this.sbWeightInfo = new StringBuilder();
//this.rtDatas.Text = "";
this.txtWT.Text = "0";
this.LDataSteam.Text = "100";
//this.serialPort1.ReadTimeout = 1000;

this.serialPort1.Open();
_continue = true;
this.backgroundWorker1.RunWorkerAsync();

}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
#endregion

#region backgroundWorker EVENT
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = ((BackgroundWorker)sender);
while (_continue)
{
try
{
string message = this.serialPort1.ReadLine();
/*
System.Threading.Thread.Sleep(300);
string message = (++count).ToString();
message


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