Add Sharp7Plc.ToString()

Sharp7.Rx/Sharp7Connector.cs

@@ -40,6 +40,7 @@ internal class Sharp7Connector : IDisposable
     }
 
     public IObservable<ConnectionState> ConnectionState => connectionStateSubject.DistinctUntilChanged().AsObservable();
+    public ConnectionState CurrentConnectionState => connectionStateSubject.Value;
 
     public ILogger Logger { get; set; }
 

Sharp7.Rx/Sharp7Plc.cs

@@ -240,6 +240,8 @@ public class Sharp7Plc : IPlc
             .ToTask(token);
     }
 
+    public override string ToString() => $"S7 {s7Connector} ({s7Connector.CurrentConnectionState})";
+
     /// <summary>
     ///     Initialize PLC and trigger connection. This method will not wait for the connection to be established.
     ///     <para>