Added clock

ntpService.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Net;
+using System.Net.Sockets;
+
+public class NtpService
+{
+    private readonly string _ntpServer;
+    private TimeSpan _timeOffset = TimeSpan.Zero;
+    private DateTime _lastSync = DateTime.MinValue;
+
+    public NtpService(string ntpServer)
+    {
+        _ntpServer = ntpServer;
+    }
+
+    public DateTime GetCurrentTime()
+    {
+        // Sync with your NTP server every 1 hour
+        if ((DateTime.UtcNow - _lastSync).TotalHours > 1)
+        {
+            SyncWithNtp();
+        }
+
+        // Apply the offset so the clock advances smoothly between syncs
+        return DateTime.Now.Add(_timeOffset);
+    }
+
+    private void SyncWithNtp()
+    {
+        try
+        {
+            var ntpData = new byte[48];
+            ntpData[0] = 0x1B; // NTP request header (Client mode, Version 3)
+
+            var addresses = Dns.GetHostEntry(_ntpServer).AddressList;
+            var ipEndPoint = new IPEndPoint(addresses[0], 123);
+
+            using (var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp))
+            {
+                socket.ReceiveTimeout = 3000;
+                socket.Connect(ipEndPoint);
+                socket.Send(ntpData);
+                socket.Receive(ntpData);
+            }
+
+            // Parse the 64-bit timestamp from the NTP response
+            ulong intPart = (ulong)ntpData[40] << 24 | (ulong)ntpData[41] << 16 | (ulong)ntpData[42] << 8 | (ulong)ntpData[43];
+            ulong fractPart = (ulong)ntpData[44] << 24 | (ulong)ntpData[45] << 16 | (ulong)ntpData[46] << 8 | (ulong)ntpData[47];
+
+            var milliseconds = (intPart * 1000) + ((fractPart * 1000) / 0x100000000L);
+            var networkTime = new DateTime(1900, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddMilliseconds((long)milliseconds);
+
+            // Calculate the difference between Pi's local UTC and NTP UTC
+            _timeOffset = networkTime - DateTime.UtcNow;
+            _lastSync = DateTime.UtcNow;
+
+            Console.WriteLine($"NTP Sync to {_ntpServer} successful. Offset: {_timeOffset.TotalMilliseconds:F1}ms");
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"NTP Sync failed: {ex.Message}");
+        }
+    }
+}