Index: firmware/App/Controllers/DGInterface.h
===================================================================
diff -u -r8c00197ce69e80f1967aa3f2eb36beb3573f36f3 -re23087e0c17f6ea81d60641fdb52121a8dd5a099
--- firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision 8c00197ce69e80f1967aa3f2eb36beb3573f36f3)
+++ firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision e23087e0c17f6ea81d60641fdb52121a8dd5a099)
@@ -105,13 +105,20 @@
     BOOL tareLoadCells;
 } DRAIN_RESERVOIR_CMD_PAYLOAD_T;
 
+/// DG command response data record structure.
+typedef struct
+{
+    U32 commandID;          ///< The command DG is responding to
+    BOOL rejected;          ///< Flag indicates if the command has been rejected
+    U32 rejectCode;         ///< Reason code for rejecting the command
+} DG_CMD_RESPONSE_T;
+
 // ********** public function prototypes **********
 
 void initDGInterface( void );
 
 void execDGInterfaceMonitor( void );
 
-void initPreTreatmentReservoirMgmt( void );
 void initTreatmentReservoirMgmt( void );
 void dialysisResumed( void );
 void execTreatmentReservoirMgmt( void );
@@ -147,6 +154,9 @@
 void cmdStopDGTrimmerHeater( void );
 void cmdDGSampleWater( void );
 
+void handleDGCommandResponse( U08 *cmdRespPtr );
+void getDGCommandResponse( DG_CMD_RESPONSE_T *cmdRespPtr );
+
 BOOL testSetDialOutLoadCellWeightOverride( U32 sensor, F32 value );
 BOOL testResetDialOutLoadCellWeightOverride( U32 sensor );