Merge pull request #41 from doingnz/develop-checki-client-connected-udp

Check if the client still has connection before calling Send in a try/catch

Source/Meadow.Logging.LogProviders/Driver/UdpLogger.cs

@@ -11,10 +11,10 @@ namespace Meadow.Logging
     public class UdpLogger : ILogProvider, IDisposable
     {
         private bool _isDisposed;
-        private int _port;
-        private UdpClient _client;
-        private IPEndPoint _broadcast;
-        private char _delimiter;
+        private readonly int _port;
+        private readonly UdpClient _client;
+        private readonly IPEndPoint _broadcast;
+        private readonly char _delimiter;
 
         /// <summary>
         /// Creates a UdpLogger instance
@@ -33,8 +33,18 @@ public UdpLogger(int port = 5100, char delimiter = '\t')
         /// <inheritdoc/>
         public void Log(LogLevel level, string message, string? _)
         {
-            var payload = Encoding.UTF8.GetBytes($"{level}{_delimiter}{message}\n");
-            _client.Send(payload, payload.Length, _broadcast);
+            if (_client.Client.Connected)
+            {
+                var payload = Encoding.UTF8.GetBytes($"{level}{_delimiter}{message}\n");
+                try
+                {
+                    _client.Send(payload, payload.Length, _broadcast);
+                }
+                catch 
+                {
+                    // TODO: ignore exceptions ?
+                }
+            }
         }
 
         /// <summary>