Index: firmware/App/Services/SystemCommMessages.h
===================================================================
diff -u -r97a93f387f6797fc747895fc915323220db12573 -rcd5be724d5a3ba7457e761191d82f278654d7f5c
--- firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 97a93f387f6797fc747895fc915323220db12573)
+++ firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision cd5be724d5a3ba7457e761191d82f278654d7f5c)
@@ -1,14 +1,14 @@
 /**************************************************************************
 *
-* Copyright (c) 2019-2023 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2019-2024 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * @file    SystemCommMessages.h
 *
 * @author  (last)      Michael Garthwaite
-* @date    (last)      15-Aug-2023
+* @date    (last)      04-Oct-2023
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  05-Nov-2019
@@ -65,23 +65,27 @@
 #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.
 typedef struct
 {
     U08 acknowledgement;         ///< Acknowledgement Byte
 } ACK_RESPONSE_PAYLOAD_T;
 
+/// Payload record structure for off button response.
 typedef struct
 {
     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.
 typedef struct
 {
     BOOL accepted;              ///< Accepted/Rejected
     U32 rejectionReason;        ///< Rejection reason if not accepted.
 } UI_RESPONSE_PAYLOAD_T;
 
+/// Payload record structure for UF change response.
 typedef struct
 {
     BOOL accepted;              ///< Accepted/Rejected
@@ -94,6 +98,7 @@
     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
@@ -103,6 +108,7 @@
     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
@@ -111,6 +117,7 @@
     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
@@ -119,6 +126,7 @@
     U32 dialRate;               ///< new dialysate flow rate
 } BLOOD_DIAL_RATE_CHANGE_RESPONSE_PAYLOAD_T;
 
+/// Payload record structure for event messages.
 typedef struct
 {
     U32 event;                  ///< Event ID
@@ -128,6 +136,7 @@
     EVENT_DATAS_T data2;        ///< Data field 2
 } EVENT_PAYLOAD_T;
 
+/// Payload record structure for treatment parameter broadcast messages.
 typedef struct
 {
     U32 minTreatmentTime;       ///< Minimum treatment duration (in minutes)
@@ -222,18 +231,9 @@
 // MSG_ID_DG_TEMPERATURE_DATA:
 void handleDGTemperatureData( MESSAGE_T *message );
 
-// MSG_ID_RO_PUMP_DATA:
-void handleROPumpData( MESSAGE_T *message );
-
 // MSG_ID_DG_FLOW_SENSORS_DATA
 void handleDialysateFlowData( MESSAGE_T *message );
 
-// MSG_ID_DRAIN_PUMP_DATA:
-void handleDrainPumpData( MESSAGE_T *message );
-
-// MSG_ID_DG_PRESSURES_DATA:
-void handleDGPressuresData( MESSAGE_T *message );
-
 // MSG_ID_DG_RESERVOIR_DATA:
 void handleDGReservoirData( MESSAGE_T *message );
 
@@ -473,6 +473,9 @@
 // MSG_ID_DG_START_STOP_FLUSH
 BOOL sendDGStartFlushModeCommand( BOOL start );
 
+// MSG_ID_DG_PARK_CONCENTRATE_PUMPS
+BOOL sendDGParkConcentratePumpsCommand( void );
+
 // MSG_ID_DG_START_STOP_HEAT_DISINFECT
 BOOL sendDGStartHeatDisinfectModeCommand( BOOL start );
 
@@ -770,9 +773,6 @@
 // MSG_ID_SUPER_CLEAR_ALARMS_CMD
 void handleTestSuperClearAlarmsRequest( MESSAGE_T *message );
 
-// MSG_ID_HD_REQUEST_CALIBRATION_DATA
-void handleTestHDCalibrationDataRequest( MESSAGE_T *message );
-
 // MSG_ID_HD_SET_CALIBRATION_RECORD
 void handleSetHDCalibrationRecord( MESSAGE_T *message );
 
@@ -1013,6 +1013,9 @@
 // MSG_ID_HD_CAN_RECEIVE_ACK_MESSAGE_OVERRIDE
 void handleTestHDPendingACKOverrideRequest( MESSAGE_T* message );
 
+// MSG_ID_HD_RECIRULATION_PCT_OVERRIDE
+void handleTestHDRecirulationPctOverrideRequest( MESSAGE_T* message );
+
 /**@}*/
 
 #endif