Index: firmware/App/Controllers/DGInterface.c
===================================================================
diff -u -r27f3db92495948d4c1192421c1b0c20338c4a034 -re8f30ca933a7c373c1a4a749ad84adb2f63b7722
--- firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 27f3db92495948d4c1192421c1b0c20338c4a034)
+++ firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision e8f30ca933a7c373c1a4a749ad84adb2f63b7722)
@@ -57,7 +57,8 @@
 
 // DG status
 static DG_OP_MODE_T dgCurrentOpMode = DG_MODE_INIT;             ///< Current DG operation mode.
-static U32 dgSubMode = 0;                                       ///< Current state (sub-mode) of current DG operation mode.
+static U32 dgSubMode = 0;                                       ///< Current state (sub-mode) of current DG operation mode.
+static BOOL dgStartCommandSent = FALSE;                         ///< Flag indicates command to start DG has been sent.
 static BOOL dgStarted = FALSE;                                  ///< Flag indicates whether we have commanded the DG to start or stop.
 static BOOL dgTrimmerHeaterOn = FALSE;                          ///< Flag indicates whether we have commanded the DG to start or stop the trimmer heater.
 static BOOL dgWaterSampled = FALSE;                             ///< Flag indicates whether we have commanded the DG to sample water.
@@ -734,7 +735,7 @@
  *************************************************************************/
 void cmdStartDG( void )
 {
-    dgStarted = TRUE;
+    dgStartCommandSent = TRUE;
     sendDGStartStopCommand( START_DG_CMD );
 }
 
@@ -839,8 +840,22 @@
 {
     dgCmdResp[ DG_CMD_START_FILL ].commandID = DG_CMD_NONE;
     dgReservoirFillVolumeTargetSet = fillToVolMl;
-    sendDGFillCommand( fillToVolMl );
+    sendDGFillCommand( DG_CMD_START, fillToVolMl );
 }
+
+/*********************************************************************//**
+ * @brief
+ * The cmdStopDGFill function sends a fill command with stop parameter message to the DG.
+ * @details Inputs: none
+ * @details Outputs: fill command with stop parameter sent to DG.
+ * @return none
+ *************************************************************************/
+void cmdStopDGFill( void )
+{
+    dgCmdResp[ DG_CMD_STOP_FILL ].commandID = DG_CMD_NONE;
+    dgReservoirFillVolumeTargetSet = 0;
+    sendDGFillCommand( DG_CMD_STOP, 0 );
+}
 
 /*********************************************************************//**
  * @brief