Index: firmware/App/Services/Messaging.h
===================================================================
diff -u -r999e1a2f4e499155d934b3aaa93c0ae02161d3c7 -rb55b4aad2941b470c5652aad5538a1bbb28a76ed
--- firmware/App/Services/Messaging.h	(.../Messaging.h)	(revision 999e1a2f4e499155d934b3aaa93c0ae02161d3c7)
+++ firmware/App/Services/Messaging.h	(.../Messaging.h)	(revision b55b4aad2941b470c5652aad5538a1bbb28a76ed)
@@ -7,8 +7,8 @@
 *
 * @file    Messaging.h
 *
-* @author  (last)      Praneeth Bunne
-* @date    (last)      04-Jun-2026
+* @author  (last)      suresh
+* @date    (last)      05-Aug-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -49,6 +49,7 @@
 {
     U08 userRequest;            ///< request to confirm, cancel, or reject off button request
 } UI_OFF_BUTTON_RESPONSE_PAYLOAD_T;
+
 #pragma pack(pop)
 
 /// Payload record structure for UI response.
@@ -69,6 +70,19 @@
     U32 maxDialRate;            ///< Maximum dialysate flow rate (in mL/min)
 } TREATMENT_PARAM_BROADCAST_PAYLOAD_T;
 
+/// Payload record structure for Pre-Treatment states broadcast.
+typedef struct
+{
+    U32 mSubMode;                   ///< Current Pre-Treatment state.
+    U32 mInstallState;              ///< Current Tube Set Install state.
+    U32 mSelfTestDryState;          ///< Current Dry Self-Test state.
+    U32 mPrimeState;                ///< Current Prime state.
+    U32 mRecirculateState;          ///< Current Pre-Treatment Recirculate state.
+    U32 mConfirmRxState;            ///< Current Confirm Rx state.
+    U32 mHeparinState;              ///< Current Heparin Setup state.
+    U32 mPatientConnectionState;    ///< Current Patient Connection state.
+} PRE_TREATMENT_STATES_DATA_PAYLOAD_T;
+
 /// Institutional record structure containing treatment parameter range limits.
 typedef struct
 {
@@ -114,6 +128,7 @@
 
 // ACK MSG
 BOOL sendACKMsg( MESSAGE_T *message );
+BOOL sendAckResponseMsg( MSG_ID_T msgID, COMM_BUFFER_T buffer, BOOL ack );
 
 // Handle version request message
 BOOL handleVersionRequestMessage( MESSAGE_T *message );
@@ -128,13 +143,16 @@
 BOOL handleUICheckIn( MESSAGE_T *message );
 BOOL handleTesterLogInRequest( MESSAGE_T *message );
 BOOL handleUpdateAvailable( MESSAGE_T *message );
+BOOL handleUIVersionResponse( MESSAGE_T *message );
 
-BOOL testTDSoftwareResetRequest( MESSAGE_T *message );
-
 // Test send message helper functions
 BOOL sendEvent( TD_EVENT_ID_T event, EVENT_DATA_T dat1, EVENT_DATA_T dat2 );
-BOOL sendOffButtonMsgToUI( U08 prompt );
+BOOL sendUIVersionRequest( void );
+BOOL sendRequestForDDResendAlarms( void );
+BOOL sendPOSTTestResult( TD_POST_STATE_T test, BOOL passed );
+BOOL sendPOSTFinalResult( BOOL passed );
 
+BOOL testTDSoftwareResetRequest( MESSAGE_T *message );
 BOOL testSetTestConfiguration( MESSAGE_T *message );
 BOOL testGetTestConfiguration( MESSAGE_T *message );
 BOOL testResetAllTestConfigurations( MESSAGE_T *message );