Index: sources/canbus/messagehandler.cpp
===================================================================
diff -u -rf36dd9c29f633b54bf7f0232093ecaefa5452ca8 -r4c53c7c62df7562a6c0915f0c5af7ea0ed884ca3
--- sources/canbus/messagehandler.cpp	(.../messagehandler.cpp)	(revision f36dd9c29f633b54bf7f0232093ecaefa5452ca8)
+++ sources/canbus/messagehandler.cpp	(.../messagehandler.cpp)	(revision 4c53c7c62df7562a6c0915f0c5af7ea0ed884ca3)
@@ -53,8 +53,9 @@
 void MessageHandler::initConnections()
 {
     // From GUI
-    connect(_ApplicationController, SIGNAL(didActionTransmit(GuiActionType, GuiActionData)),
-            this                  ,   SLOT( onActionTransmit(GuiActionType, GuiActionData)));
+    connect(_ApplicationController, SIGNAL(didActionTransmit(GuiActionType, const QByteArray &)),
+            this                  ,   SLOT( onActionTransmit(GuiActionType, const QByteArray &)));
+
     // From HD/DG
     connect(_CanInterface         , SIGNAL(        didRead(QCanBusFrame)),
             this                  ,   SLOT(onFrameReceive (QCanBusFrame)));
@@ -68,12 +69,17 @@
     transmitFrame(eChlid_UI, GuiActions::Check_In);
 }
 
-void MessageHandler::transmitFrame(MessageHandler::Can_Id vCan_Id, GuiActionType vAction, GuiActionData vData)
+void MessageHandler::transmitFrame(MessageHandler::Can_Id vCan_Id, GuiActionType vAction, const QByteArray &vData)
 {
     QCanBusFrame mFrame;
     mFrame.setFrameId(vCan_Id);
-    mFrame.setPayload(buildMessage(vAction,vData));
-    emit didFrameTransmit(mFrame);
+    QList<QByteArray> mFrames = buildMessage(vAction,vData);
+    for (auto frame : mFrames) {
+        mFrame.setPayload(frame);
+        //TODO : If it's necessary we can have a dispatcher
+        // to schedule and send messages in another thread.
+        emit didFrameTransmit(mFrame);
+    }
 }
 
 bool MessageHandler::ignoreChannel(const QCanBusFrame &vFrame)
@@ -93,16 +99,27 @@
     return false;
 }
 
-QByteArray MessageHandler::buildMessage(GuiActionType vAction, GuiActionData vData)
+QList<QByteArray> MessageHandler::buildMessage(GuiActionType vAction, const QByteArray &vData)
 {
+    QList<QByteArray> mFrames;
     QByteArray   mPayload ;
-    addSyncByte (mPayload);
-    addActionId (mPayload, vAction );   // Message ID
-    addLegth    (mPayload, vAction );   // Payload Length
-    addData     (mPayload, vData   );   // Adding required Data
-    addCRC      (mPayload);             // CRC
-    addPadding  (mPayload);             // Padded to 8 byte frame
-    return       mPayload ;
+    addSyncByte (mPayload);                 // SyncByte
+    addActionId (mPayload, vAction);        // Message ID
+    addData     (mPayload, vAction, vData); // Regarding Payload Length, Adding required Data
+    addCRC      (mPayload);                 // CRC
+
+    quint16 len = mPayload.length();
+    if (len > eLenCanFrame) {
+        quint8 frameCount = len / eLenCanFrame;
+        for (quint8 i = 0; i <= frameCount; i++) {
+            mFrames += mPayload.mid(i*eLenCanFrame,eLenCanFrame);
+        }
+    } else {
+        mFrames += mPayload;
+    }
+
+    addPadding  (mFrames.last());             // Padded to 8 byte frame
+    return       mFrames;
 }
 
 void MessageHandler::addSyncByte(QByteArray &vPayload)
@@ -118,18 +135,21 @@
     }
 }
 
-void MessageHandler::addLegth(QByteArray &vPayload, GuiActionType vAction)
+void MessageHandler::addData(QByteArray &vPayload, GuiActionType vAction, const QByteArray &vData)
 {
-    vPayload.append(payloadLen[vAction]);
+    quint8 len = payloadLen[vAction];
+    // if len has been set to max(255)
+    // it means it has no limit and can be as long as 255 bytes
+    if (len == eLenMaxData) {
+        len = vData.length();
+        if (vData.length() > eLenMaxData) {
+            len = eLenMaxData ;
+        }
+    }
+    vPayload += len;
+    vPayload += vData.mid(0, len); // Adding required Data
 }
 
-void MessageHandler::addData(QByteArray &vPayload, GuiActionData vData)
-{
-    // if the payload is more than a remaining frame empty bytes
-    // then it requires to be chopped.
-    vPayload.append(vData); // Adding required Data
-}
-
 void MessageHandler::addPadding(QByteArray &vPayload)
 {
     vPayload = vPayload.leftJustified(eLenCanFrame, '\0');
@@ -252,8 +272,9 @@
  * \details Processes the requested action
  * \param vAction - User requested Action
  */
-void MessageHandler::onActionTransmit(GuiActionType vAction, GuiActionData vData)
+void MessageHandler::onActionTransmit(GuiActionType vAction, const QByteArray &vData)
 {
+    qDebug() << vData;
     transmitFrame(eChlid_UI, vAction, vData);
 }