diff --git a/app/src/main/java/me/datenknoten/tueroeffner/CommandExecuter.java b/app/src/main/java/me/datenknoten/tueroeffner/CommandExecuter.java
new file mode 100644
index 0000000..1a85d7f
--- /dev/null
+++ b/app/src/main/java/me/datenknoten/tueroeffner/CommandExecuter.java
@@ -0,0 +1,63 @@
+/*******************************************************************************
+ * "THE VODKA-WARE LICENSE" (Revision 42):
+ * Tim <tim@datenknoten.me> wrote this file.  As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a vodka in return — Tim Schumacher
+ ******************************************************************************/
+
+package me.datenknoten.tueroeffner;
+
+import android.os.AsyncTask;
+import android.widget.EditText;
+
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.DefaultHttpClient;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+/**
+ * Created by tim on 27.01.2015.
+ */
+public class CommandExecuter extends AsyncTask<String, Integer, Boolean> {
+    private String key = "";
+
+    public CommandExecuter(String Key) {
+        this.key = Key;
+    }
+
+    @Override
+    protected Boolean doInBackground(String... params) {
+        int count = params.length;
+
+        try {
+            for (String param : params) {
+                executeCommand(param);
+                // Escape early if cancel() is called
+                if (isCancelled()) break;
+            }
+            return true;
+        } catch (Exception e) {
+            return false;
+
+        }
+
+    }
+
+    /**
+     * Sends a command to the door server.
+     *
+     * @param cmd
+     */
+    private Boolean executeCommand(String cmd) throws IOException, URISyntaxException {
+        HttpClient client = new DefaultHttpClient();
+        HttpGet request = new HttpGet();
+        URI uri = new URI("https://tuer.hackspace-jena.de/cgi-bin/kraut.space?secret="+key+"&cmd="+cmd);
+        request.setURI(uri);
+        HttpResponse response = client.execute(request);
+        return true;
+    }
+}
diff --git a/app/src/main/java/me/datenknoten/tueroeffner/MainActivity.java b/app/src/main/java/me/datenknoten/tueroeffner/MainActivity.java
index e08d834..e1b82e2 100644
--- a/app/src/main/java/me/datenknoten/tueroeffner/MainActivity.java
+++ b/app/src/main/java/me/datenknoten/tueroeffner/MainActivity.java
@@ -45,6 +45,7 @@ import java.net.URISyntaxException;
 import java.util.List;
 
 
+
 public class MainActivity extends ActionBarActivity {
 
     final static String networkSSID = "\"KrautSpace\"";
@@ -169,38 +170,50 @@ public class MainActivity extends ActionBarActivity {
         }
     }
 
-    public void buttonOpenOuterDoor(View v) {
-        executeCommand("outdoor_buzz");
-        Toast.makeText(v.getContext(), getString(R.string.buzzer_success), Toast.LENGTH_SHORT).show();
+    private String getDoorKey() {
+        EditText key_editor = (EditText) findViewById(R.id.txtPass);
+        return key_editor.getText().toString();
     }
 
-    private void executeCommand(String cmd) {
-        EditText key_editor = (EditText) findViewById(R.id.txtPass);
-
+    /**
+     * Executes outdoor buzz
+     *
+     * @param v
+     */
+    public void buttonOpenOuterDoor(View v) {
         try {
-            HttpClient client = new DefaultHttpClient();
-            HttpGet request = new HttpGet();
-            URI uri = new URI("https://tuer.hackspace-jena.de/cgi-bin/kraut.space?secret="+key_editor.getText()+"&cmd="+cmd);
-            request.setURI(uri);
-            HttpResponse response = client.execute(request);
-        } catch (URISyntaxException e) {
-            e.printStackTrace();
-        } catch (ClientProtocolException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (IOException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
+            new CommandExecuter(getDoorKey()).doInBackground("outdoor_buzz");
+            Toast.makeText(v.getContext(), getString(R.string.buzzer_success), Toast.LENGTH_SHORT).show();
+        } catch (Exception e) {
+            Toast.makeText(v.getContext(), "Konnte Befehl „Buzzer“ nicht ausführen.", Toast.LENGTH_SHORT).show();
         }
     }
 
+    /**
+     * Executes unlock indoor
+     *
+     * @param v
+     */
     public void buttonOpenInnerDoor(View v) {
-        executeCommand("indoor_unlock");
-        Toast.makeText(v.getContext(), getString(R.string.door_unlock), Toast.LENGTH_SHORT).show();
+        try {
+            new CommandExecuter(getDoorKey()).doInBackground("indoor_unlock");
+            Toast.makeText(v.getContext(), getString(R.string.door_unlock), Toast.LENGTH_SHORT).show();
+        } catch (Exception e) {
+            Toast.makeText(v.getContext(), "Konnte Befehl „Tür aufschließen“ nicht ausführen.", Toast.LENGTH_SHORT).show();
+        }
     }
 
-    public void buttonUnluckInnerDoor(View v) {
-        executeCommand("indoor_open");
-        Toast.makeText(v.getContext(), getString(R.string.door_open), Toast.LENGTH_SHORT).show();
+    /**
+     * Executes open indoor
+     *
+     * @param v
+     */
+    public void buttonUnlockInnerDoor(View v) {
+        try {
+            new CommandExecuter(getDoorKey()).doInBackground("indoor_open");
+            Toast.makeText(v.getContext(), getString(R.string.door_open), Toast.LENGTH_SHORT).show();
+        } catch (Exception e) {
+            Toast.makeText(v.getContext(), "Konnte Befehl „Tür öffnen“ nicht ausführen.", Toast.LENGTH_SHORT).show();
+        }
     }
 }