Aggiungere i file di progetto.

OMControl.slnx

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+<Solution>
+  <Project Path="OMControl/OMControl.csproj" />
+</Solution>

OMControl/Form1.Designer.cs

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+namespace OMControl
+{
+    partial class Form1
+    {
+
+
+        /// <summary>
+        ///  Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        ///  Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        ///  Required method for Designer support - do not modify
+        ///  the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            listBoxPorts = new ListBox();
+            SuspendLayout();
+            // 
+            // listBoxPorts
+            // 
+            listBoxPorts.FormattingEnabled = true;
+            listBoxPorts.Location = new Point(196, 150);
+            listBoxPorts.Name = "listBoxPorts";
+            listBoxPorts.Size = new Size(150, 104);
+            listBoxPorts.TabIndex = 0;
+            // 
+            // Form1
+            // 
+            AutoScaleDimensions = new SizeF(8F, 20F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(listBoxPorts);
+            Name = "Form1";
+            Text = "Form1";
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private ListBox listBoxPorts;
+    }
+}

OMControl/Form1.cs

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+using System.IO.Ports;
+
+namespace OMControl
+{
+    public partial class Form1 : Form
+    {
+        private SerialPortWatcher _watcher;
+        public Form1()
+        {
+            InitializeComponent();
+            this.Load += Form1_Load;
+
+        }
+        
+
+        private void Form1_Load(object sender, EventArgs e)
+        {
+            listBoxPorts.Items.Clear();
+            foreach (var p in SerialPort.GetPortNames())
+                listBoxPorts.Items.Add(p);
+
+            // start watcher
+            _watcher = new SerialPortWatcher(1000);
+
+            _watcher.PortsAdded += ports => BeginInvoke(() =>
+            {
+                foreach (var p in ports)
+                    if (!listBoxPorts.Items.Contains(p))
+                        listBoxPorts.Items.Add(p);
+            });
+
+            _watcher.PortsRemoved += ports => BeginInvoke(() =>
+            {
+                foreach (var p in ports)
+                    listBoxPorts.Items.Remove(p);
+            });
+
+            _watcher.Start();
+        }
+        protected override void OnFormClosing(FormClosingEventArgs e)
+        {
+            _watcher?.Dispose();
+            base.OnFormClosing(e);
+        }
+    }
+}

OMControl/Form1.resx

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+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

OMControl/OMControl.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWindowsForms>true</UseWindowsForms>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="System.IO.Ports" Version="10.0.1" />
+  </ItemGroup>
+
+</Project>

OMControl/Program.cs

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+namespace OMControl
+{
+    internal static class Program
+    {
+        /// <summary>
+        ///  The main entry point for the application.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            // To customize application configuration such as set high DPI settings or default font,
+            // see https://aka.ms/applicationconfiguration.
+            ApplicationConfiguration.Initialize();
+            Application.Run(new Form1());
+        }
+    }
+}

OMControl/Serial/SerialDeviceProbe.cs

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+using System;
+using System.Collections.Generic;
+using System.IO.Ports;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+public sealed class SerialDeviceProbe
+{
+    public record ProbeResult(string Port, bool Success, string? DeviceId, byte[]? RawResponse, string? Error);
+
+    // Define known signatures here
+    // Example: response contains ASCII "DEV:XYZ" or starts with 0xAA 0x55 etc.
+    private readonly List<(string Name, Func<byte[], bool> Match)> _signatures = new();
+
+    public SerialDeviceProbe AddSignature(string name, Func<byte[], bool> match)
+    {
+        _signatures.Add((name, match));
+        return this;
+    }
+
+    public async Task<ProbeResult> ProbeAsync(
+        string portName,
+        int baudRate,
+        byte[] probeBytes,
+        int readTimeoutMs = 250,
+        int writeTimeoutMs = 250,
+        int settleDelayMs = 80,
+        int maxReadBytes = 256,
+        CancellationToken ct = default)
+    {
+        try
+        {
+            return await Task.Run(() =>
+            {
+                ct.ThrowIfCancellationRequested();
+
+                using var sp = new SerialPort(portName, baudRate)
+                {
+                    ReadTimeout = readTimeoutMs,
+                    WriteTimeout = writeTimeoutMs,
+                    Encoding = Encoding.ASCII,
+                    DtrEnable = true,   // often needed for Arduino-like boards
+                    RtsEnable = true
+                };
+
+                sp.Open();
+
+                // Some devices reboot on open (Arduino). Give them a moment.
+                Thread.Sleep(settleDelayMs);
+
+                sp.DiscardInBuffer();
+                sp.DiscardOutBuffer();
+
+                sp.Write(probeBytes, 0, probeBytes.Length);
+
+                // Read available bytes up to timeout
+                var buffer = new List<byte>(maxReadBytes);
+                var start = Environment.TickCount;
+
+                while (buffer.Count < maxReadBytes && Environment.TickCount - start < readTimeoutMs)
+                {
+                    ct.ThrowIfCancellationRequested();
+
+                    try
+                    {
+                        int b = sp.ReadByte(); // blocks until byte or timeout
+                        if (b >= 0) buffer.Add((byte)b);
+
+                        // Optional: break early if you know response length or terminator
+                        // e.g. if buffer ends with '\n'
+                        if (buffer.Count >= 2 && buffer[^1] == (byte)'\n') break;
+                    }
+                    catch (TimeoutException)
+                    {
+                        break;
+                    }
+                }
+
+                var resp = buffer.ToArray();
+                if (resp.Length == 0)
+                    return new ProbeResult(portName, false, null, resp, "No response");
+
+                // Identify by signature
+                foreach (var sig in _signatures)
+                {
+                    if (sig.Match(resp))
+                        return new ProbeResult(portName, true, sig.Name, resp, null);
+                }
+
+                // Unknown but responded
+                return new ProbeResult(portName, true, "Unknown", resp, null);
+
+            }, ct);
+        }
+        catch (Exception ex)
+        {
+            return new ProbeResult(portName, false, null, null, ex.Message);
+        }
+    }
+
+    public async Task<ProbeResult[]> ProbeAllAsync(
+        IEnumerable<string> ports,
+        int baudRate,
+        byte[] probeBytes,
+        CancellationToken ct = default)
+    {
+        var tasks = ports.Select(p => ProbeAsync(p, baudRate, probeBytes, ct: ct));
+        return await Task.WhenAll(tasks);
+    }
+}

OMControl/Serial/SerialManager.cs

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+using System;
+using System.IO.Ports;
+using System.Text;
+
+public class SerialManager : IDisposable
+{
+    private SerialPort _serialPort;
+
+    public event Action<string>? DataReceived;
+
+    public bool IsOpen => _serialPort?.IsOpen ?? false;
+
+    public SerialManager(string portName, int baudRate)
+    {
+        _serialPort = new SerialPort(portName, baudRate)
+        {
+            Encoding = Encoding.ASCII,
+            NewLine = "\n"
+        };
+
+        _serialPort.DataReceived += OnDataReceived;
+    }
+
+    public void Open()
+    {
+        if (!_serialPort.IsOpen)
+            _serialPort.Open();
+    }
+
+    public void Close()
+    {
+        if (_serialPort.IsOpen)
+            _serialPort.Close();
+    }
+
+    public void Send(string data)
+    {
+        if (_serialPort.IsOpen)
+            _serialPort.WriteLine(data);
+    }
+
+    private void OnDataReceived(object sender, SerialDataReceivedEventArgs e)
+    {
+        string data = _serialPort.ReadLine();
+        DataReceived?.Invoke(data);
+    }
+
+    public void Dispose()
+    {
+        Close();
+        _serialPort.Dispose();
+    }
+}

OMControl/Serial/SerialPortWatcher.cs

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+using System;
+using System.Collections.Generic;
+using System.IO.Ports;
+using System.Linq;
+using System.Timers;
+
+public sealed class SerialPortWatcher : IDisposable
+{
+    private readonly System.Timers.Timer _timer;
+    private HashSet<string> _last = new(StringComparer.OrdinalIgnoreCase);
+
+    public event Action<string[]>? PortsAdded;
+    public event Action<string[]>? PortsRemoved;
+
+    public SerialPortWatcher(double intervalMs = 1000)
+    {
+        _timer = new System.Timers.Timer(intervalMs);
+        _timer.Elapsed += (_, _) => Tick();
+        _timer.AutoReset = true;
+    }
+
+    public void Start()
+    {
+        _last = GetPorts();
+        _timer.Start();
+    }
+
+    public void Stop() => _timer.Stop();
+
+    private void Tick()
+    {
+        var current = GetPorts();
+
+        var added = current.Except(_last).ToArray();
+        var removed = _last.Except(current).ToArray();
+
+        if (added.Length > 0) PortsAdded?.Invoke(added);
+        if (removed.Length > 0) PortsRemoved?.Invoke(removed);
+
+        _last = current;
+    }
+
+    private static HashSet<string> GetPorts()
+        => new HashSet<string>(SerialPort.GetPortNames(), StringComparer.OrdinalIgnoreCase);
+
+    public void Dispose()
+    {
+        _timer.Stop();
+        _timer.Dispose();
+    }
+}
+