diff --git a/Zway/Devices/Instance.cs b/Zway/Devices/Instance.cs
index 72a75a6..f267740 100644
--- a/Zway/Devices/Instance.cs
+++ b/Zway/Devices/Instance.cs
@@ -10,7 +10,7 @@ using LitJson;
 namespace BlubbFish.IoT.Zway.Devices {
   public class Instance {
     private DateTime nextwakeup;
-    private Boolean polling;
+    private readonly Boolean polling;
 
     public delegate void UpdatedInstance(Object sender, DeviceUpdateEvent e);
     public event UpdatedInstance Update;
diff --git a/Zway/Interfaces/ACommandClass.cs b/Zway/Interfaces/ACommandClass.cs
index fcb3fe3..3ed8ea5 100644
--- a/Zway/Interfaces/ACommandClass.cs
+++ b/Zway/Interfaces/ACommandClass.cs
@@ -31,18 +31,21 @@ namespace BlubbFish.IoT.Zway.Interfaces {
       ZWavePlusInfo = 94,
       MultiChannel = 96,
       DoorLock = 98,
+      BarrierOperator = 102,
       ManufacturerSpecific = 114,
       PowerLevel = 115,
       InclusionController = 116,
       Protection = 117,
       NodeNaming = 119,
       FirmwareUpdate = 122,
+      Clock = 129,
       Association = 133,
       Version = 134,
       Proprietary = 136,
       TimeParameters = 139,
       MultiChannelAssociation = 142,
       MultiCmd = 143,
+      SimpleAVControl = 148,
       Security = 152
     }
 
diff --git a/Zway/Properties/AssemblyInfo.cs b/Zway/Properties/AssemblyInfo.cs
index 47877e2..fd97e1f 100644
--- a/Zway/Properties/AssemblyInfo.cs
+++ b/Zway/Properties/AssemblyInfo.cs
@@ -10,7 +10,7 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyConfiguration("")]
 [assembly: AssemblyCompany("")]
 [assembly: AssemblyProduct("Zway")]
-[assembly: AssemblyCopyright("Copyright ©  2017 - 03.05.2018")]
+[assembly: AssemblyCopyright("Copyright ©  2017 - 29.09.2018")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // Sie können alle Werte angeben oder Standardwerte für die Build- und Revisionsnummern verwenden,
 // indem Sie "*" wie unten gezeigt eingeben:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.4.4")]
-[assembly: AssemblyFileVersion("1.4.4")]
+[assembly: AssemblyVersion("1.5.0")]
+[assembly: AssemblyFileVersion("1.5.0")]
diff --git a/Zway/ZwayController.cs b/Zway/ZwayController.cs
index 96bf6d6..2bf26f9 100644
--- a/Zway/ZwayController.cs
+++ b/Zway/ZwayController.cs
@@ -104,9 +104,11 @@ namespace BlubbFish.IoT.Zway {
       CultureInfo.DefaultThreadCurrentUICulture = info;
       Thread.CurrentThread.CurrentCulture = info;
       Thread.CurrentThread.CurrentUICulture = info;
+      DateTime lastRequest = DateTime.Now.AddSeconds(-2);
       while (true) {
-        Int64 date = ((DateTimeOffset)DateTime.Now.AddSeconds(-2)).ToUnixTimeSeconds();
-        JsonData notifications = this.http.GetJson("ZWave.zway/Data/"+date);
+        Int64 date = ((DateTimeOffset)lastRequest).ToUnixTimeSeconds();
+        lastRequest = DateTime.Now;
+        JsonData notifications = this.http.GetJson("ZWave.zway/Data/" + date);         
         foreach (String item in notifications.Keys) {
           Match match = new Regex("^devices\\.([0-9]+)\\.instances\\.([0-9]+)\\.commandClasses\\.([0-9]+)(\\.data\\.([0-9]+)|\\.data\\.[a-z].*|\\.data)$", RegexOptions.IgnoreCase).Match(item);
           if(match.Success) {
diff --git a/Zway/bin/Release/Zway.dll b/Zway/bin/Release/Zway.dll
index 4050284..41321df 100644
Binary files a/Zway/bin/Release/Zway.dll and b/Zway/bin/Release/Zway.dll differ
diff --git a/Zway/lib/HttpClient.cs b/Zway/lib/HttpClient.cs
index 0f153b6..18e041a 100644
--- a/Zway/lib/HttpClient.cs
+++ b/Zway/lib/HttpClient.cs
@@ -8,7 +8,7 @@ namespace BlubbFish.IoT.Zway.lib {
   public class HttpConnection {
     private readonly String auth;
     private readonly String server;
-    private readonly Object getLock = new Object();
+    private static readonly Object getLock = new Object();
 
     internal HttpConnection(String server, String user, String pass) {
       this.auth = "Basic " + Convert.ToBase64String(Encoding.ASCII.GetBytes(user + ":" + pass));
@@ -17,11 +17,23 @@ namespace BlubbFish.IoT.Zway.lib {
     }
 
     private void Init() {
-      this.GetString("ZAutomation/api/v1/status");
+      this.GetVoid("ZAutomation/api/v1/status");
     }
 
     internal JsonData GetJson(String v) {
-      String text = this.GetString(v);
+      String text = null;
+      for (Int32 i = 0; i < 3; i++) {
+        try {
+          text = this.GetString(v);
+          break;
+        } catch (Exception e) {
+          Helper.WriteError(e.Message);
+          if(i==2) {
+            throw;
+          }
+          System.Threading.Thread.Sleep(30000);
+        }
+      }
       if(text == null) {
         return new JsonData();
       }
@@ -33,14 +45,25 @@ namespace BlubbFish.IoT.Zway.lib {
     }
 
     internal void GetVoid(String v) {
-      this.GetString(v, false);
+      for (Int32 i = 0; i < 3; i++) {
+        try {
+          this.GetString(v, false);
+          break;
+        } catch (Exception e) {
+          Helper.WriteError(e.Message);
+          if (i == 2) {
+            throw;
+          }
+          System.Threading.Thread.Sleep(30000);
+        }
+      }
     }
 
     private String GetString(String v, Boolean withoutput = true) {
       String ret = null;
-      lock (this.getLock) {
+      lock (getLock) {
         HttpWebRequest request = WebRequest.CreateHttp(this.server + v);
-        request.Timeout = 5000;
+        request.Timeout = 10000;
         request.Headers.Add(HttpRequestHeader.Authorization, this.auth);
         try {
           using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) {