Index: firmware/App/Controllers/DGInterface.c
===================================================================
diff -u -rbd738c0705e8640d2c532ecece876aaa3496ee32 -ra19a676d1e67bb3e1aca9e9bba49727f9d5f8b38
--- firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision bd738c0705e8640d2c532ecece876aaa3496ee32)
+++ firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision a19a676d1e67bb3e1aca9e9bba49727f9d5f8b38)
@@ -26,11 +26,17 @@
 
 // ********** private definitions **********
 
+#define START_DG_CMD        TRUE
+#define STOP_DG_CMD         FALSE
 
 // ********** private data **********
 
-// DG mode
+// DG status
 static DG_OP_MODE_T dgCurrentOpMode = DG_MODE_INIT;
+static BOOL dgStarted = FALSE;
+static BOOL dgStartetSet = FALSE;
+static BOOL dgWaterSampled = FALSE;
+static BOOL dgWaterSampledSet = FALSE;
 
 // DG sensor data
 static F32 dgPressures[ NUM_OF_DG_PRESSURE_SENSORS ];
@@ -204,7 +210,7 @@
  * @param drainVol : Reservoir drain to volume reported by DG.
  * @return none
  *************************************************************************/
-void setDGReservoirsData( U32 resID, U32 fillVol, U32 drainVol )
+void setDGReservoirsData( DG_RESERVOIR_ID_T resID, U32 fillVol, U32 drainVol )
 {
     if ( resID < NUM_OF_DG_RESERVOIRS )
     {
@@ -275,11 +281,11 @@
  * @param trimmerHtrTemp : commanded target dialysate temperature for the trimmer heater.
  * @return none
  *************************************************************************/
-void cmdSetDGDialysateTargetTemps( U32 primaryHtrTemp, U32 trimmerHtrTemp )
+void cmdSetDGDialysateTargetTemps( F32 primaryHtrTemp, F32 trimmerHtrTemp )
 {
     dgPrimaryTempSet = primaryHtrTemp;
     dgTrimmerTempSet = trimmerHtrTemp;
-    // TODO - send command to DG
+    sendDialysateTempTargetsToDG( primaryHtrTemp, trimmerHtrTemp );
 }
 
 /*********************************************************************//**
@@ -293,7 +299,8 @@
  *************************************************************************/
 void cmdStartDG( void )
 {
-    // TODO - send command to DG
+    dgStarted = TRUE;
+    sendDGStartStopCommand( START_DG_CMD );
 }
 
 /*********************************************************************//**
@@ -307,7 +314,8 @@
  *************************************************************************/
 void cmdStopDG( void )
 {
-    // TODO - send command to DG
+    dgStarted = FALSE;
+    sendDGStartStopCommand( STOP_DG_CMD );
 }
 
 /*********************************************************************//**
@@ -325,7 +333,7 @@
     if ( resID < NUM_OF_DG_RESERVOIRS )
     {
         dgActiveReservoirSet = resID;
-        // TODO - send command to DG
+        sendDGSwitchReservoirCommand( resID );
     }
     else
     {
@@ -345,7 +353,7 @@
 void cmdStartDGFill( U32 fillToVolMl )
 {
     dgReservoirFillVolumeTargetSet = fillToVolMl;
-    // TODO - send command to DG
+    sendDGFillCommand( fillToVolMl );
 }
 
 /*********************************************************************//**
@@ -360,7 +368,21 @@
 void cmdStartDGDrain( U32 drainToVolMl )
 {
     dgReservoirDrainVolumeTargetSet = drainToVolMl;
-    // TODO - send command to DG
+    sendDGDrainCommand( drainToVolMl );
 }
 
+/*********************************************************************//**
+ * @brief
+ * The cmdDGSampleWater function sends a sample water command message to the DG.
+ * @details
+ * Inputs : none
+ * Outputs : sample water command sent to DG.
+ * @return none
+ *************************************************************************/
+void cmdDGSampleWater( void )
+{
+    dgWaterSampled = TRUE;
+    sendDGSampleWaterCommand();
+}
+
 /**@}*/