Index: sources/canbus/messageglobals.h
===================================================================
diff -u -re58b907a69d4ca7daa77d69791593b886d1b80e8 -r8c69137f18382bdc55a5678e6ed44a7683fe4dea
--- sources/canbus/messageglobals.h	(.../messageglobals.h)	(revision e58b907a69d4ca7daa77d69791593b886d1b80e8)
+++ sources/canbus/messageglobals.h	(.../messageglobals.h)	(revision 8c69137f18382bdc55a5678e6ed44a7683fe4dea)
@@ -18,10 +18,19 @@
 
 // Project
 #include "guiglobals.h"
+#include "types.h"
 
 namespace Can {
 
 /*!
+ * \brief   Sequence
+ * \details the messages sequence type
+ */
+typedef qint16          Sequence;
+typedef Types::S16      Sequence_Bytes;
+#define SEQUENCE_MAX    INT16_MAX
+
+/*!
  * \brief   Payload Length
  * \details List of each ActionID required data (in byte) length in the message.
  *          So the data collector has to collect this amount of bytes as payload of a message.
@@ -50,11 +59,7 @@
  */
 enum Frame_Data : quint8 {
     eLenCanFrame        =   8, ///< The length of each can frame. Should be padded by 0x00 if is less.
-#ifdef DISABLE_SEQUENCE
-    eLenHeaderInfo      =   3, ///< The Header length witch is included in CRC after Sync byte
-#else
     eLenHeaderInfo      =   5, ///< The Header length witch is included in CRC after Sync byte (it's the sum of eLenSequence + eLenActionId + eLenLength)
-#endif
     eLenMaxHeaderData   =   3, ///< Maximum data byte can be in one frame as header data portion
     eLenMaxData         = 255, ///< Maximum data length in a Can Message since data length value kept in one byte
 
@@ -90,8 +95,8 @@
     eChlid_DG_HD    = 0x010, ///< DG => HD
 
     // UI is  listening
-    eChlid_HD       = 0x020, ///< HD => UI
-    eChlid_UI       = 0x100, ///< UI => HD [Out]
+    eChlid_HD_UI    = 0x020, ///< HD => UI
+    eChlid_UI_HD    = 0x100, ///< UI => HD [Out]
 
     // UI lessens occasionally
     eChlid_DG_UI    = eChlid_DG_Alarm, ///< No direct channel has been defined between DG&UI, May be required for logging
@@ -104,7 +109,7 @@
  */
 struct Message { // TODO : Should be converted to MessageModel class // no time left for now !!!
     Can_Id              can_id;
-    qint16              sequence    = 0; // seq 0 is invalid
+    Sequence            sequence    = 0; // seq 0 is invalid
     Gui::GuiActionType  actionId    = Gui::GuiActionType::Unknown;
     int                 length      = 0;
     QByteArray          head;