Hi Guys,

I'm trying to save data that i received from serial port into text file. So far, there is nothing in the file. What should i do?
Here is the code:

Code:
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick

        If SerialPort1.IsOpen Then
            Data_received &= SerialPort1.ReadExisting
            If Len(Data_received) > 0 Then
                ReceiveTextBox.Text = Data_received
                HistoryTextBox.Text = TimeOfDay.ToLongTimeString + " : " + Data_received + vbNewLine + HistoryTextBox.Text

                Dim writeFile As New System.IO.StreamWriter("Read.txt")
                writeFile.Write(SerialPort1.ReadExisting())
                writeFile.Close()
            End If
       End If

    End Sub