Index: firmware/App/Services/Messaging.h
===================================================================
diff -u -r395522dffef1348e176564925656012f529c1910 -r4a822b31b79b7e8a6bf60b45065be70c16172214
--- firmware/App/Services/Messaging.h	(.../Messaging.h)	(revision 395522dffef1348e176564925656012f529c1910)
+++ firmware/App/Services/Messaging.h	(.../Messaging.h)	(revision 4a822b31b79b7e8a6bf60b45065be70c16172214)
@@ -7,22 +7,22 @@
 *
 * @file    Messaging.h
 *
-* @author  (last)      Shyam Kumar Mathamala
-* @date    (last)      25-Aug-2025
+* @author  (last)      Dara Navaei
+* @date    (last)      13-Apr-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
 *
 ***************************************************************************/
-
-#ifndef __MESSAGING_H__
-#define __MESSAGING_H__
 
+#ifndef __MESSAGING_H__
+#define __MESSAGING_H__
+
 #include "TDCommon.h"
 #include "TDDefs.h"
 #include "MessageSupport.h"
 #include "MsgQueues.h"
-
+
 /**
  *  @defgroup Messaging Messaging
  *  @brief The system communication messages unit provides helper functions
@@ -35,7 +35,7 @@
 // ********** public definitions **********
 
 #define ACK_REQUIRED                    TRUE            ///< Macro for functions that want to know if an outgoing message requires acknowledgement from receiver.
-#define ACK_NOT_REQUIRED                FALSE           ///< Macro for functions that want to know if an outgoing message requires acknowledgement from receiver.
+#define ACK_NOT_REQUIRED                FALSE           ///< Macro for functions that want to know if an outgoing message requires acknowledgement from receiver.
 
 #pragma pack(push, 1)
 /// Payload record structure for ACK response.
@@ -58,47 +58,6 @@
     U32 rejectionReason;        ///< Rejection reason if not accepted.
 } UI_RESPONSE_PAYLOAD_T;
 
-/// Payload record structure for UF change response.
-typedef struct
-{
-    BOOL accepted;              ///< Accepted/Rejected
-    U32 rejectionReason;        ///< Rejection reason if not accepted.
-    F32 ufVolume;               ///< UF Volume in mL.
-    U32 durationInMinutes;      ///< new Treatment duration in minutes.
-    S32 timeDiff;               ///< Treatment duration difference.
-    F32 ufRate;                 ///< new UF rate in mL/min.
-    F32 rateDiff;               ///< difference between new and old UF rates.
-    F32 oldUFRate;              ///< Previous UF Rate in mL/min.
-} UF_SETTINGS_CHANGE_RESPONSE_PAYLOAD_T;
-
-/// Payload record structure for UF change confirmation response.
-typedef struct
-{
-    BOOL accepted;              ///< Accepted/Rejected
-    U32 rejectionReason;        ///< Rejection reason if not accepted.
-    F32 volume;                 ///< UF Volume in mL.
-    U32 duration;               ///< Treatment duration in minutes
-    F32 ufRate;                 ///< UF rate in mL.
-} UF_SETTINGS_CONFIRMATION_RESPONSE_PAYLOAD_T;
-
-/// Payload record structure for treatment duration change response.
-typedef struct
-{
-    BOOL accepted;              ///< Accepted/Rejected
-    U32 rejectionReason;        ///< Rejection reason if not accepted.
-    U32 duration;               ///< Treatment duration in minutes
-    F32 volume;                 ///< UF Volume in mL.
-} TREATMENT_TIME_CHANGE_RESPONSE_PAYLOAD_T;
-
-/// Payload record structure for blood / dialysate rate change response.
-typedef struct
-{
-    BOOL accepted;              ///< Accepted/Rejected
-    U32 rejectionReason;        ///< Rejection reason if not accepted.
-    U32 bloodRate;              ///< new blood flow rate
-    U32 dialRate;               ///< new dialysate flow rate
-} BLOOD_DIAL_RATE_CHANGE_RESPONSE_PAYLOAD_T;
-
 /// Payload record structure for treatment parameter broadcast messages.
 typedef struct
 {
@@ -110,6 +69,7 @@
     U32 maxDialRate;            ///< Maximum dialysate flow rate (in mL/min)
 } TREATMENT_PARAM_BROADCAST_PAYLOAD_T;
 
+/// Institutional record structure containing treatment parameter range limits.
 typedef struct
 {
     U32 minBloodFlowMLPM;                                   ///< Min blood flow in mL/min.
@@ -138,13 +98,13 @@
     F32 maxHeparinBolusVolumeML;                            ///< Max heparin bolus volume in mL.
     U32 enableChemicalDisinfect;                            ///< Enable/disable chemical disinfect.
 } HD_INSTITUTIONAL_LOCAL_RECORD_T;
-
-// ********** public function prototypes **********
 
-// Serialize message
+// ********** public function prototypes **********
+
+// Serialize message
 U32 serializeMessage( MESSAGE_T msg, COMM_BUFFER_T buffer, BOOL ackReq );
 
-// ACK MSG
+// ACK MSG
 BOOL sendACKMsg( MESSAGE_T *message );
 
 // Handle version request message
@@ -154,10 +114,12 @@
 
 BOOL isTestingActivated( void );
 void setTesterStatusToLoggedOut( void );
+void resetMicroControllerUnit( void );
 
 void handleIncomingMessage( MESSAGE_T *message );
 BOOL handleUICheckIn( MESSAGE_T *message );
 BOOL handleTesterLogInRequest( MESSAGE_T *message );
+BOOL handleUpdateAvailable( MESSAGE_T *message );
 
 BOOL testTDSoftwareResetRequest( MESSAGE_T *message );
 
@@ -171,4 +133,4 @@
 
 /**@}*/
 
-#endif
+#endif