Index: firmware/App/Controllers/DGInterface.c
===================================================================
diff -u -reb5370021e7e60c18732382a512886da0f9b276d -r526e890e4e35fac0a622af538bf611ea15a30609
--- firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision eb5370021e7e60c18732382a512886da0f9b276d)
+++ firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 526e890e4e35fac0a622af538bf611ea15a30609)
@@ -8,7 +8,7 @@
 * @file    DGInterface.c
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      07-Apr-2023
+* @date    (last)      10-Aug-2023
 *
 * @author  (original)  Sean
 * @date    (original)  08-Apr-2020
@@ -96,8 +96,8 @@
 static BOOL dgOpModeDataFreshFlag = FALSE;                                  ///< Flag to signal the handleDGOpMode() to process fresh dg op mode data
 
 // Reservoir data
-static DG_RESERVOIR_ID_T dgActiveReservoir = DG_RESERVOIR_2;                ///< Latest active reservoir reported by the DG.
-static DG_RESERVOIR_ID_T dgActiveReservoirSet = DG_RESERVOIR_2;             ///< Active reservoir commanded.
+static DG_RESERVOIR_ID_T dgActiveReservoir;                                 ///< Latest active reservoir reported by the DG.
+static DG_RESERVOIR_ID_T dgActiveReservoirSet;                              ///< Active reservoir commanded.
 
 static U32 dgReservoirFillVolumeTarget = 0;                                 ///< Latest fill-to volume reported by the DG.
 static U32 dgReservoirFillVolumeTargetSet = 0;                              ///< Fill-to volume commanded.
@@ -129,12 +129,13 @@
 {
     U32 i, j;
 
+    // NOTE: the active reservoir is set to reservoir 1 since DG will send active reservoir 1 as active on power up
     dgStarted                       = FALSE;
     dgTrimmerHeaterOn               = FALSE;
     dgTrimmerTempSet                = 0.0F;
     dgTrimmerTempCheckTimerCtr      = 0;
-    dgActiveReservoirSet            = DG_RESERVOIR_2;
-    dgActiveReservoir               = DG_RESERVOIR_2;
+    dgActiveReservoirSet            = DG_RESERVOIR_1;
+    dgActiveReservoir               = DG_RESERVOIR_1;
     dgReservoirFillVolumeTargetSet  = 0;
     dgReservoirDrainVolumeTargetSet = 0;
     dgDialysateTemp                 = 0.0F;
@@ -246,6 +247,11 @@
 
         // Trigger alarm if not receiving new DG op mode message in timely manner
         checkDGDataFreshness( ALARM_ID_HD_DG_NEW_OPERATION_MODE_MESSAGE_NOT_RECEIVE, &dgOpModeDataFreshFlag );
+        if ( TRUE == isAlarmActive( ALARM_ID_HD_DG_NEW_OPERATION_MODE_MESSAGE_NOT_RECEIVE ) )
+        {
+            // we don't want to keep thinking DG is in a useful mode - set it to fault mode until DG is able to report its' true mode status
+            setDGOpMode( DG_MODE_FAUL, 0 );
+        }
 
         // Check to see if DG has restarted
         checkDGRestart();
@@ -1055,17 +1061,17 @@
 
 /*********************************************************************//**
  * @brief
- * The cmdStartDGChememicalFlushDisinfect function sends a start chemical disinfect
+ * The cmdStartDGChemicalFlushDisinfect function sends a start chemical disinfect
  * flush command message to the DG.
  * @details Inputs: none
  * @details Outputs: start chemical disinfect flush mode command sent to DG.
  * @return none
  *************************************************************************/
-void cmdStartDGChememicalFlushDisinfect( void )
+void cmdStartDGChemicalFlushDisinfect( void )
 {
     BOOL start = TRUE;
     dgCmdResp[ DG_CMD_START_CHEM_DISINFECT_FLUSH ].commandID = DG_CMD_NONE;
-    sendDGStartChemicalDisinfectFlushModeCommand( start );
+    sendDGStartStopChemicalDisinfectFlushModeCommand( start );
 }
 
 /*********************************************************************//**
@@ -1080,11 +1086,57 @@
 {
     BOOL start = FALSE;
     dgCmdResp[ DG_CMD_STOP_CHEM_DISINFECT_FLUSH ].commandID = DG_CMD_NONE;
-    sendDGStartChemicalDisinfectFlushModeCommand( start );
+    sendDGStartStopChemicalDisinfectFlushModeCommand( start );
 }
 
 /*********************************************************************//**
  * @brief
+ * The cmdStopDGActiveCool function sends a stop active cool command
+ * message to the DG.
+ * @details Inputs: none
+ * @details Outputs: stop active cool mode command sent to DG.
+ * @return none
+ *************************************************************************/
+void cmdStopDGActiveCool( void )
+{
+    dgCmdResp[ DG_CMD_STOP_ACTIVE_COOL ].commandID = DG_CMD_NONE;
+    sendDGStopActiveCoolModeCommand();
+}
+
+/*********************************************************************//**
+ * @brief
+ * The cmdStartDGROPermeateSampleMode function sends an RO permeate sample
+ * start command message to the DG.
+ * @details Inputs: none
+ * @details Outputs: start RO permeate sample mode command sent to DG.
+ * @return none
+ *************************************************************************/
+void cmdStartDGROPermeateSampleMode( void )
+{
+    BOOL start = TRUE;
+
+    dgCmdResp[ DG_CMD_START_RO_PERMEATE_SAMPLE ].commandID = DG_CMD_NONE;
+    sendDGStartStopDGROPermeateSampleModeCommand( start );
+}
+
+/*********************************************************************//**
+ * @brief
+ * The cmdStopDGROPermeateSampleMode function sends an RO permeate sample
+ * stop command message to the DG.
+ * @details Inputs: none
+ * @details Outputs: stop RO permeate sample mode command sent to DG.
+ * @return none
+ *************************************************************************/
+void cmdStopDGROPermeateSampleMode( void )
+{
+    BOOL start = FALSE;
+
+    dgCmdResp[ DG_CMD_STOP_RO_PERMEATE_SAMPLE ].commandID = DG_CMD_NONE;
+    sendDGStartStopDGROPermeateSampleModeCommand( start );
+}
+
+/*********************************************************************//**
+ * @brief
  * The cmdRequestDGConcentrateRatios function sends a request to DG to receive
  * the concentrate ratios.
  * @details Inputs: none
@@ -1223,8 +1275,8 @@
  * @brief
  * The checkDGRestart function checks to see if DG has restarted after started
  * by HD and triggers appropriate alarm.
- * @details Inputs: dgStarted
- * @details Outputs: triggers a fault alarm if DG restarted
+ * @details Inputs: dgStartCommandSent, dgStarted, dgCurrentOpMode
+ * @details Outputs: dgStartCommandSent, dgStarted, triggers a fault alarm if DG restarted
  * @return none
  *************************************************************************/
 static void checkDGRestart( void )
@@ -1241,6 +1293,7 @@
              ( DG_MODE_FILL != dgCurrentOpMode ) && ( DG_MODE_DRAI != dgCurrentOpMode ) )
         {
             activateAlarmNoData( ALARM_ID_HD_DG_RESTARTED_FAULT );
+            dgStarted = FALSE;  // do not want to re-trigger alarm after alarm is cleared
         }
     }
 }