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PORetrieve multiple serial port in same time using background worker
 

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  1. PORetrieve multiple serial port in same time using background worker
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    <p>i want to ask about read data from serial port using background worker. Is it possible to retrieve data from one serial port or more using one worker? I can retrieve data when only use one serial port in worker. When i use two or more ports, i can't retrieve data anymore (without error message). Here is my code :</p> <pre><code> private void worker_DoWork(object sender, DoWorkEventArgs e) { String p = ""; String s = ""; Int32 b = 0; MethodInvoker get_selectedPort = new MethodInvoker(() =&gt; { p = comboBoxPressure.SelectedItem.ToString(); s = comboBoxStrain.SelectedItem.ToString(); b = Convert.ToInt32(comboBoxBaudrate.SelectedItem.ToString()); }); this.Invoke(get_selectedPort); SerialPort portPressure = new SerialPort(); // serial port 1 portPressure.PortName = p; portPressure.BaudRate = b; portPressure.Parity = Parity.None; portPressure.StopBits = StopBits.One; portPressure.DataBits = 8; portPressure.Handshake = Handshake.None; SerialPort portStrain = new SerialPort(); // serial port 2 portStrain.PortName = s; portStrain.BaudRate = b; portStrain.Parity = Parity.None; portStrain.StopBits = StopBits.One; portStrain.DataBits = 8; portStrain.Handshake = Handshake.None; try { portPressure.Open(); portStrain.Open(); } catch (Exception error) { MessageBox.Show("Error while trying open serial port!\r\n" + error.Message, "COM Port Error", MessageBoxButtons.OK, MessageBoxIcon.Error); worker.CancelAsync(); return; } while (!worker.CancellationPending) { System.Threading.Thread.Sleep(100); this.dataPressure = portPressure.ReadExisting(); this.dataStrain = portStrain.ReadExisting(); BeginInvoke((Action)(() =&gt; updateData())); } portPressure.Close(); portStrain.Close(); } } </code></pre>
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    1. PTQuestion
    1. USJohn Saunders
    1. USAhmad H.
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      1. PORetrieve multiple serial port in same time using background worker
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      1. VTUpMod
    2. VO
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      1. VTUpMod
    1. COWhy do you want to make things so complicated? Just make two threads, one for each port.
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      1. PORetrieve multiple serial port in same time using background worker
      1. USMartin James
    2. COPretty unclear. When you use Handshake.None then it is up to you to turn on the handshake lines. Set DtrEnable and RtsEnable to true.
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      1. PORetrieve multiple serial port in same time using background worker
      1. USHans Passant
    3. COThank you for your reply. I need retrieve data from these ports in same time, so i think they must be opened in same worker. I need these data in pair, because i will plot them in graph.
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      1. USAhmad H.
 

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