diff --git a/Utils-IoT/Connector/AUserBackend.cs b/Utils-IoT/Connector/AUserBackend.cs
index 23b0714..8d2458c 100644
--- a/Utils-IoT/Connector/AUserBackend.cs
+++ b/Utils-IoT/Connector/AUserBackend.cs
@@ -5,6 +5,5 @@ namespace BlubbFish.Utils.IoT.Connector {
   public abstract class AUserBackend : ABackend {
     public AUserBackend(Dictionary<String, String> settings) : base(settings) {}
     public abstract void Send(String message);
-    public abstract void Send(String message, String[] buttons);
   }
 }
diff --git a/Utils-IoT/Events/GpsEvent.cs b/Utils-IoT/Events/GpsEvent.cs
new file mode 100644
index 0000000..33fed47
--- /dev/null
+++ b/Utils-IoT/Events/GpsEvent.cs
@@ -0,0 +1,58 @@
+using System;
+
+namespace BlubbFish.Utils.IoT.Events {
+  public class GpsEvent : BackendEvent {
+    #region mandatory field
+    public Double BatteryLevel {
+      get; set;
+    }
+    public Boolean CorrectInterface {
+      get; set;
+    }
+    public LoraDataGps Gps {
+      get; set;
+    }
+    public String Hash {
+      get; set;
+    }
+    public String Name {
+      get; set;
+    }
+    #endregion
+
+    #region optional field
+    public DateTime Receivedtime {
+      get; set;
+    }
+    public Double Rssi {
+      get; set;
+    }
+    public Double Snr {
+      get; set;
+    }
+    #endregion
+
+    public class LoraDataGps {
+      #region mandatory field
+      public Double Latitude {
+        get; set;
+      }
+      public Double Longitude {
+        get; set;
+      }
+      public Boolean Fix {
+        get; set;
+      }
+      public Double Height {
+        get; set;
+      }
+      #endregion
+
+      #region optional field
+      public Double Hdop {
+        get; set;
+      }
+      #endregion
+    }
+  }
+}
diff --git a/Utils-IoT/Events/UserEvent.cs b/Utils-IoT/Events/UserEvent.cs
index e4fefd3..ee851bd 100644
--- a/Utils-IoT/Events/UserEvent.cs
+++ b/Utils-IoT/Events/UserEvent.cs
@@ -3,6 +3,6 @@
 namespace BlubbFish.Utils.IoT.Events {
   public class UserEvent : BackendEvent {
     public UserEvent() : base() { }
-    public UserEvent(String message, Int64 UserId, DateTime date) : base(message, UserId, date, "User") { }
+    public UserEvent(String message, Tuple<Int64, String, Int64, String> UserId, DateTime date) : base(message, UserId, date, "User") { }
   }
 }