Index: firmware/App/Services/SystemCommMessages.h
===================================================================
diff -u -r68b7f509295fb25aead139a4391913ca05989fdc -rb6416214042da75dfa311b726e401442b34315d7
--- firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 68b7f509295fb25aead139a4391913ca05989fdc)
+++ firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision b6416214042da75dfa311b726e401442b34315d7)
@@ -8,7 +8,7 @@
 * @file    SystemCommMessages.h
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      26-Feb-2023
+* @date    (last)      27-Mar-2023
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  05-Nov-2019
@@ -48,6 +48,13 @@
 #define ACK_REQUIRED                    TRUE        ///< Require an ACK.
 #define ACK_NOT_REQUIRED                FALSE       ///< Not require an ACK.
 
+/// UI response payload data structure
+typedef struct
+{
+    BOOL accepted;                                  ///< Accepted/Rejected
+    U32 rejectionReason;                            ///< Rejection reason if not accepted.
+} UI_RESPONSE_PAYLOAD_T;
+
 // ********** public function prototypes **********
 
 U32 serializeMessage( MESSAGE_T msg, COMM_BUFFER_T buffer, BOOL ackReq );
@@ -175,6 +182,12 @@
 // MSG_ID_HD_SEND_CHEM_FLUSH_SAMPLE_PASS_FAIL_TO_DG
 void handleReceiveChemFlushSampleResultsFromHD( MESSAGE_T *message );
 
+// MSG_ID_DG_SET_RO_MODE_ONLY
+void handleSetROOnlyMode( MESSAGE_T* message );
+
+// MSG_ID_DG_REQUEST_RO_MODE_ONLY_STATUS
+void requestROOnlyModeStatusFromUI( void );
+
 // *********** public test support message functions **********
 
 // MSG_TESTER_LOG_IN