How to convert Hex to ASCII based on this code?

Question

The main question is here How to display weight from weighing scale into a textbox via serial port RS-232 or usb converter?

Now i am trying to get the value of hex and convert it to ascii and display.

Main code is this

public partial class MainForm : Form
{
    private SerialPort _serialPort; // formda kullanilacak degisken
    private const int BaudRate = 9600; // BaudRate Constant. default 9600 ile oynanabilir 
    public MainForm()
    {
        InitializeComponent();
    }

    private void MainForm_Load(object sender, EventArgs e)
    {
        this.MinimizeBox = false;
        string[] portNames = SerialPort.GetPortNames(); // bütün kullanilabilecek com portlari okur
        foreach (var portName in portNames)
        {
            comboBox1.Items.Add(portName); // Adds Ports to combobox
        }
        if (comboBox1.SelectedIndex != -1)
        {
            comboBox1.SelectedIndex = 0; // Selects first entry (convenience purposes)
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        // This block ensures that no exceptions happen
        if (_serialPort != null && _serialPort.IsOpen)
            _serialPort.Close();
        if (_serialPort != null)
            _serialPort.Dispose();
        // End of Block

        _serialPort = new SerialPort(comboBox1.Text, BaudRate, Parity.None, 8, StopBits.One);  //<-- Creates new SerialPort using the name selected in the combobox

        _serialPort.DataReceived += SerialPortOnDataReceived; //<-- this event happens everytime when new data is received by the ComPort
        _serialPort.Open(); //<-- make the comport listen
        textBox1.Text = string.Format("Listening on {0}...", comboBox1.Text);

    //here i am trying @Adam Casey 's code and serialReceived thing doesn't work.
         byte[] serialReceived;
         string reading = Encoding.UTF8.GetString(serialReceived);
         textBox2.Text = reading.Substring(13);
    }
    private delegate void Closure();
    private void SerialPortOnDataReceived(object sender, SerialDataReceivedEventArgs serialDataReceivedEventArgs)
    {
        if (InvokeRequired)     //<-- Makes sure the function is invoked to work properly in the UI-Thread
            BeginInvoke(new Closure(() => { SerialPortOnDataReceived(sender, serialDataReceivedEventArgs); }));     //<-- Function invokes itself
        else
        {
            while (_serialPort.BytesToRead > 0) //<-- repeats until the In-Buffer is empty
            {
                textBox1.Text += string.Format("{0:X2} ", _serialPort.ReadByte()); //<-- bytewise adds inbuffer to textbox
            }
        }
    }

Answer 1

I've experience on Com port and RS232 , if you elaborate your problem I can help .

If your problem is just converting a string based hex value to ASCII use following.

         //41 is ACII 'A'
        String hs = "41";
        var x = Convert.ToUInt32(hs, 16);
        StringBuilder sb= new StringBuilder();
        sb.Append(Convert.ToChar(x))
        String s = sb.ToString();

EDIT according to your comment

033 ID_00: 10.6 kg is gathered by following code

 String hs = "x30 30 33 33 20 49 44 5F 30 30 3A 20 20 20 31 30 2E 36 20 6B 67 20 0D 0A 0D 0A";
            System.Text.RegularExpressions.Match match = System.Text.RegularExpressions.Regex.Match(hs, "([A-Z-0-9]{2}) ");
            StringBuilder sb = new StringBuilder();
            System.Text.RegularExpressions.Match m = match.NextMatch();
            while(m.Success)
            {
                var x = Convert.ToUInt32(m.Value.Trim(),16);
                sb.Append(Convert.ToChar(x));
               m= m.NextMatch();
            }


            String s = sb.ToString();

If you have any initial char you may substring it first but this regex will mach par hex for you. Notice this and than you can code another regext to gather kg information , such as : (.+?) kg is a pattern to catch kg information from your ASCII representation.