Index: sources/canbus/messageacknowmodel.h
===================================================================
diff -u -r939d1bae9a394697d46ca913a2dc3442bf8ef82f -r1ec7b44e6d1d66460d2da943ff65f3c0c0755d8f
--- sources/canbus/messageacknowmodel.h	(.../messageacknowmodel.h)	(revision 939d1bae9a394697d46ca913a2dc3442bf8ef82f)
+++ sources/canbus/messageacknowmodel.h	(.../messageacknowmodel.h)	(revision 1ec7b44e6d1d66460d2da943ff65f3c0c0755d8f)
@@ -29,6 +29,7 @@
 /*!
  * \brief   The AcknowModel class
  * \details This is the private class of the MessageAcknowModel
+ *          which keeps list of the messages require Acknow.
  *          but since Qt doesn't support nested meta objects,
  *          it has been moved out with a meaningful namespace.
  */
@@ -38,7 +39,7 @@
 
     const int   _interval = 1000; // in ms
     int         _timerId  = 0;
-    quint8      _retry    = 9;
+    quint8      _retry    = 5;
 
     Can_Id      _can_Id   = Can_Id::eChlid_NONE;
     Sequence    _sequence = 0;
@@ -53,9 +54,7 @@
         _frameList  = vFrameList;
     }
 
-    void start() {
-        _timerId = startTimer(_interval);
-    }
+    void start();
 
 protected:
     /*!
@@ -77,11 +76,30 @@
     }
 
 signals:
+
+    /*!
+     * \brief   didFramesTransmit
+     * \details This signal is emitted when the requested Acknow has not been received during the _interval to retry to send message.
+     * \param   vCan_Id    - Denali message Can channel
+     * \param   vSequence  - Sequence number of the message which requires Acknow
+     * \param   vFrameList - List of the frames to be sent on retries.
+     */
     void didFramesTransmit(Can_Id vCan_Id, Sequence vSequence, const FrameList &vFrameList); // Retry
+
+    /*!
+     * \brief   didFailedTransmit
+     * \details This signal is emitted when the requested Acknow has not been received after all the _retry times of retries.
+     * \param   vSequence
+     */
     void didFailedTransmit(                Sequence vSequence                             ); // Retry failed
 };
 
 }
+
+/*!
+ * \brief The MessageAcknowModel class
+ * \details The wrapper class of the AcknowModel which does the thread handling.
+ */
 class MessageAcknowModel : public QObject
 {
     Q_OBJECT
@@ -110,7 +128,23 @@
     void quitThread();
 
 signals:
+
+    /*!
+     * \brief   didFramesTransmit
+     * \details This signal is the propagation signal to propagate the AcknowModel Message signal of the same name
+     *          when the requested Acknow has not been received during the _interval to retry to send message.
+     * \param   vCan_Id    - Denali message Can channel
+     * \param   vSequence  - Sequence number of the message which requires Acknow
+     * \param   vFrameList - List of the frames to be sent on retries.
+     */
     void didFramesTransmit(Can_Id vCan_Id, Sequence vSequence, const FrameList &vFrameList); // Retry
+
+    /*!
+     * \brief   didFailedTransmit
+     * \details This signal is the propagation signal to propagate the AcknowModel Message signal of the same name
+     *          when the requested Acknow has not been received after all the _retry times of retries.
+     * \param   vSequence
+     */
     void didFailedTransmit(                Sequence vSequence                             ); // Retry failed
 
 private slots: