Timeout exception when reading from serial port

[mmdullah]

Dear all, I got Timeout exception when reading from serial port. how to overcome? code: // ports boudRate =115200, readtimeout=300 and writetimeout=300 private void btnRead_Click(object sender, EventArgs e) { OpenPort(); string str; try { Thread.Sleep(1000); str = _serialPort.ReadLine(); // exception occurs here } catch (Exception ex) { str = ex.Message; } txtReadText.Text += string.Format("{0}{1}", "", str); ClosePort(); }

[PIEBALDconsult]

Oh how lovely; we're so proud.

[mmdullah]

courtesy is a small thing but enough to make a big difference

[Alan N]

Hi, This is the expected behaviour. If _serialPort.ReadLine() is called and no data is available then the TimeoutException will be raised after 300ms. If you want ReadLine to block then don't set a timeout. Alan.