Index: main.cpp
===================================================================
diff -u -rf2db5c985e5c0ae7835a69eff43bfc537e6dd2fc -r922463c555493a51ea20744a95dd62976adaf0f9
--- main.cpp	(.../main.cpp)	(revision f2db5c985e5c0ae7835a69eff43bfc537e6dd2fc)
+++ main.cpp	(.../main.cpp)	(revision 922463c555493a51ea20744a95dd62976adaf0f9)
@@ -371,7 +371,6 @@
     LOG_DEBUG("UI Initializing");
     if ( startGui() ) {
         LOG_DEBUG("UI Initialized");
-        // _ApplicationController  .startPOST();
         app_exec = app.exec();
     }
 
Index: sources/ApplicationController.cpp
===================================================================
diff -u -rf2db5c985e5c0ae7835a69eff43bfc537e6dd2fc -r922463c555493a51ea20744a95dd62976adaf0f9
--- sources/ApplicationController.cpp	(.../ApplicationController.cpp)	(revision f2db5c985e5c0ae7835a69eff43bfc537e6dd2fc)
+++ sources/ApplicationController.cpp	(.../ApplicationController.cpp)	(revision 922463c555493a51ea20744a95dd62976adaf0f9)
@@ -18,7 +18,6 @@
 #include <QtConcurrent/QtConcurrent>
 
 // Project
-#include "MainTimer.h"
 #include "MessageDispatcher.h"
 #include "Logger.h"
 #include "DeviceController.h"
@@ -28,6 +27,7 @@
 #include "MSettings.h"
 #include "WifiInterface.h"
 #include "BluetoothInterface.h"
+#include "MessageAcknowModel.h"
 
 /*!
  * \brief   ApplicationController::ApplicationController
@@ -99,9 +99,6 @@
     connect(&_post  , SIGNAL(   didDone (bool               )),
             this    , SLOT  (onPOSTDone (bool               )));
 
-    connect(&_MainTimer        , SIGNAL(        didTimeout()),
-            this               ,   SLOT(onMainTimerTimeout()));
-
     // From GUI
     connect(&_GuiController , SIGNAL(didActionTransmit(GuiActionType, const QVariantList &)),
             this            ,   SLOT( onActionTransmit(GuiActionType, const QVariantList &)));
@@ -220,16 +217,6 @@
 }
 
 /*!
- * \brief   ApplicationController::onMainTimerTimeout
- * \details This slot is called by MainTimer::didTimeout each second
- *          to call required methods like keepAlive
- */
-void ApplicationController::onMainTimerTimeout()
-{
-    keepAlive();
-}
-
-/*!
  * \brief   ApplicationController::onUSBDriveMount
  * \details This is the slot which connects to the _DeviceController didUSBDriveMount signal
  *          and notifies the other classes (GuiController) by emitting its signal didUSBDriveMount
@@ -574,14 +561,17 @@
  */
 void ApplicationController::onstartPOST() {
     LOG_DEBUG("ApplicationPost Start");
-    emit didActionTransmit(GuiActionType::ID_KeepAlive, {});
+    _MessageAcknowModel.doStartCheckIn();
     _post.start();
 }
 
+/*!
+ * \brief   ApplicationController::onGuiReadyNotify
+ * \details The POST entry point
+ *           - calls the private slot onstartPOST
+ * \return  void
+ */
 void ApplicationController::onGuiReadyNotify()
 {
-    LOG_DEBUG("ApplicationPost Start");
-    emit didActionTransmit(GuiActionType::ID_KeepAlive, {});
-    _MainTimer.start();
-    _post.start();
+    onstartPOST();
 }
Index: sources/MainTimer.cpp
===================================================================
diff -u -rf2db5c985e5c0ae7835a69eff43bfc537e6dd2fc -r922463c555493a51ea20744a95dd62976adaf0f9
--- sources/MainTimer.cpp	(.../MainTimer.cpp)	(revision f2db5c985e5c0ae7835a69eff43bfc537e6dd2fc)
+++ sources/MainTimer.cpp	(.../MainTimer.cpp)	(revision 922463c555493a51ea20744a95dd62976adaf0f9)
@@ -115,8 +115,6 @@
  */
 void MainTimer::timerEvent(QTimerEvent *)
 {
-    if ( ! _running ) return;
-
 #ifndef DISABLE_ACKNOW_CHECKIN_MESSAGE_LOG
     emit didTimeout();
 #endif
Index: sources/MainTimer.h
===================================================================
diff -u -rf2db5c985e5c0ae7835a69eff43bfc537e6dd2fc -r922463c555493a51ea20744a95dd62976adaf0f9
--- sources/MainTimer.h	(.../MainTimer.h)	(revision f2db5c985e5c0ae7835a69eff43bfc537e6dd2fc)
+++ sources/MainTimer.h	(.../MainTimer.h)	(revision 922463c555493a51ea20744a95dd62976adaf0f9)
@@ -36,14 +36,9 @@
 
     static const int _interval = 1000; //ms
 
-    bool _running = false;
-
 public:
     bool init();
     void quit();
-    inline void start() {
-        _running = true;
-    }
 
 private:
     bool isDateChanged(bool vIncludeTime = false);
Index: sources/canbus/MessageAcknowModel.cpp
===================================================================
diff -u -r3e64d98e243484505a44d99b13826097cb6b01eb -r922463c555493a51ea20744a95dd62976adaf0f9
--- sources/canbus/MessageAcknowModel.cpp	(.../MessageAcknowModel.cpp)	(revision 3e64d98e243484505a44d99b13826097cb6b01eb)
+++ sources/canbus/MessageAcknowModel.cpp	(.../MessageAcknowModel.cpp)	(revision 922463c555493a51ea20744a95dd62976adaf0f9)
@@ -45,7 +45,7 @@
     // runs in MessageAcknowModel thread
     initConnections();
     LOG_DEBUG(tr("%1 Initialized").arg(metaObject()->className()));
-
+    startTimer(_interval);
     return true;
 }
 
@@ -73,6 +73,7 @@
 {
     // coco begin validated: Application termination is not correctly done in coco!!!
     // it has been tested and works perfectly fine in normal run.
+    qDeleteAll(_acknowList);
     quitThread(); // validated
 }
 // coco end
Index: sources/canbus/MessageAcknowModel.h
===================================================================
diff -u -rfc329c788fe9453983072bee937ccbc95b4ed6e4 -r922463c555493a51ea20744a95dd62976adaf0f9
--- sources/canbus/MessageAcknowModel.h	(.../MessageAcknowModel.h)	(revision fc329c788fe9453983072bee937ccbc95b4ed6e4)
+++ sources/canbus/MessageAcknowModel.h	(.../MessageAcknowModel.h)	(revision 922463c555493a51ea20744a95dd62976adaf0f9)
@@ -120,10 +120,28 @@
     QThread    *_thread     = nullptr;
     bool        _init       = false;
 
+    const int   _interval   = 1000; // in ms
+    bool        _checkin    = false;
+
+protected:
+    void timerEvent(QTimerEvent *) override {
+        if ( _checkin )
+            emit didCheckIn();
+    }
+
 public slots:
     bool init();
     bool init(QThread &vThread);
 
+    /*!
+     * \brief   doStartCheckIn
+     * \details emits the first check-in signal and sets the check-in flag to start the check-in
+     */
+    void doStartCheckIn() {
+        emit didCheckIn();
+        _checkin = true;
+    }
+
 private slots:
     void quit();
 
@@ -134,6 +152,11 @@
     void quitThread();
 
 signals:
+    /*!
+     * \brief   didCheckIn
+     * \details This signal is emitted on each interval (1s) to notify MessageDispatcher to send a Check-In
+     */
+    void didCheckIn();
 
     /*!
      * \brief   didFramesTransmit
Index: sources/canbus/MessageDispatcher.cpp
===================================================================
diff -u -rf2db5c985e5c0ae7835a69eff43bfc537e6dd2fc -r922463c555493a51ea20744a95dd62976adaf0f9
--- sources/canbus/MessageDispatcher.cpp	(.../MessageDispatcher.cpp)	(revision f2db5c985e5c0ae7835a69eff43bfc537e6dd2fc)
+++ sources/canbus/MessageDispatcher.cpp	(.../MessageDispatcher.cpp)	(revision 922463c555493a51ea20744a95dd62976adaf0f9)
@@ -104,6 +104,9 @@
     connect(&_MessageAcknowModel   , SIGNAL(didFailedTransmit(        Sequence                      )),
             this                   ,   SLOT( onFailedTransmit(        Sequence                      )));
 
+    connect(&_MessageAcknowModel   , SIGNAL(didCheckIn       (                                      )),
+            this                   ,   SLOT( onCheckIn       (                                      )));
+
     // Application Settings are ready
     connect(&_ApplicationController, SIGNAL(didSettingsDone  ()),
             this                   ,   SLOT( onSettingsDone  ()));
@@ -213,6 +216,15 @@
 // coco end
 
 /*!
+ * \brief   MessageDispatcher::onCheckIn
+ * \details Sending the Check-In message.
+ */
+void MessageDispatcher::onCheckIn()
+{
+    actionTransmit(GuiActionType::ID_KeepAlive, {});
+}
+
+/*!
  * \brief   MessageDispatcher::onActionTransmit
  * \details This slot will be called by ApplicationController::didActionTransmit
  *          upon UI message transmit request and calls MessageDispatcher::actionTransmit method.
Index: sources/canbus/MessageDispatcher.h
===================================================================
diff -u -rcbb246d6efa242f927f88ac5da518dedb2d63320 -r922463c555493a51ea20744a95dd62976adaf0f9
--- sources/canbus/MessageDispatcher.h	(.../MessageDispatcher.h)	(revision cbb246d6efa242f927f88ac5da518dedb2d63320)
+++ sources/canbus/MessageDispatcher.h	(.../MessageDispatcher.h)	(revision 922463c555493a51ea20744a95dd62976adaf0f9)
@@ -246,6 +246,7 @@
     //
     void onFramesTransmit (Can_Id   vCan_Id, Sequence vSequence, const FrameList   &vFrameList);
     void onFailedTransmit (                  Sequence vSequence);
+    void onCheckIn        ();
 
     // An Action has been requested to be transmitted.
     void onActionTransmit (GuiActionType vActionId, const QVariantList &vData);