Index: firmware/App/Controllers/DGInterface.h
===================================================================
diff -u -rd4a90fda6c1f463633a4e7d45424acd2d2a0bce8 -rc282822f36836a8127f447c8ac5b8a50e851be63
--- firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision d4a90fda6c1f463633a4e7d45424acd2d2a0bce8)
+++ firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision c282822f36836a8127f447c8ac5b8a50e851be63)
@@ -39,32 +39,14 @@
 #define FILL_RESERVOIR_TO_VOLUME_ML         1300    ///< Fill reservoir to this volume (in mL) during treatment.
 #endif
 
-/// Enumeration of load cell sensors.
-typedef enum Load_Cells
-{
-    LOAD_CELL_RESERVOIR_1_PRIMARY = 0,              ///< Primary load cell for reservoir 1.
-    LOAD_CELL_RESERVOIR_1_BACKUP,                   ///< Backup load cell for reservoir 1.
-    LOAD_CELL_RESERVOIR_2_PRIMARY,                  ///< Primary load cell for reservoir 2.
-    LOAD_CELL_RESERVOIR_2_BACKUP,                   ///< Backup load cell for reservoir 2.
-    NUM_OF_LOAD_CELLS                               ///< Number of load cell sensors.
-} LOAD_CELL_T;
-
-/// Enumeration of DG reservoirs.
-typedef enum DG_Reservoirs
-{
-    DG_RESERVOIR_1 = 0,                             ///< Reservoir #1.
-    DG_RESERVOIR_2,                                 ///< Reservoir #2.
-    NUM_OF_DG_RESERVOIRS                            ///< Number of reservoirs.
-} DG_RESERVOIR_ID_T;
-
 /// Enumeration of DG pressure sensors.
 typedef enum DG_PressureSensors
 {
-    DG_PRESSURE_SENSOR_RO_PUMP_INLET = 0,           ///< RO pump pressure sensor.
-    DG_PRESSURE_SENSOR_RO_PUMP_OUTLET,              ///< RO pump pressure sensor.
-    DG_PRESSURE_SENSOR_DRAIN_PUMP_INLET,            ///< drain pump inlet pressure.
-    DG_PRESSURE_SENSOR_DRAIN_PUMP_OUTLET,           ///< drain pump outlet pressure.
-    NUM_OF_DG_PRESSURE_SENSORS                      ///< Number of pressure sensors.
+    DG_PRESSURE_SENSOR_RO_PUMP_INLET = 0,          ///< RO pump pressure sensor.
+    DG_PRESSURE_SENSOR_RO_PUMP_OUTLET,             ///< RO pump pressure sensor.
+    DG_PRESSURE_SENSOR_DRAIN_PUMP_INLET,           ///< Drain pump inlet pressure.
+    DG_PRESSURE_SENSOR_DRAIN_PUMP_OUTLET,          ///< Drain pump outlet pressure.
+    NUM_OF_DG_PRESSURE_SENSORS                     ///< Number of pressure sensors.
 } DG_PRESSURE_SENSORS_T;
 
 /// Payload record structure for an RO pump data message.
@@ -123,6 +105,14 @@
     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 );
@@ -140,7 +130,7 @@
 U32 getDGROPumpPressureSetPt( void );
 F32 getDGROPumpFlowRateMlMin( void );
 U32 getDGDrainPumpRPMSetPt( void );
-F32 getLoadCellWeightInGrams( LOAD_CELL_T loadCellID );
+F32 getLoadCellWeightInGrams( LOAD_CELL_ID_T loadCellID );
 F32 getReservoirWeightSmallFilter( DG_RESERVOIR_ID_T resID );
 F32 getReservoirWeightLargeFilter( DG_RESERVOIR_ID_T resID );
 
@@ -163,6 +153,9 @@
 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 );