Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -r46bf7baaa9d8095e0405b018fcd4bc594907797e -rd5f2ac4d84453feb1b782f35f9d69432977a95f6
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision 46bf7baaa9d8095e0405b018fcd4bc594907797e)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision d5f2ac4d84453feb1b782f35f9d69432977a95f6)
@@ -7,8 +7,8 @@
 *
 * @file    SystemComm.c
 *
-* @author  (last)      Dara Navaei
-* @date    (last)      12-Jul-2022
+* @author  (last)      Michael Garthwaite
+* @date    (last)      08-Aug-2022
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  05-Nov-2019
@@ -888,6 +888,10 @@
             handleDGScheduledRunsRequest( message );
             break;
 
+        case MSG_ID_HD_REQUEST_DG_SERVICE_MODE:
+            handleServiceModeRequest( message );
+            break;
+
         // NOTE: This case must be last
         case MSG_ID_DG_TESTER_LOGIN_REQUEST:
             handleTesterLogInRequest( message );
@@ -1196,6 +1200,14 @@
                 handleResendAllAlarmsCommand( message );
                 break;
 
+            case MSG_ID_DG_SET_OP_MODE_REQUEST:
+                handleTestSetOpModeRequest( message );
+                break;
+
+            case MSG_ID_DG_RESERVOIR_TARE_REQUEST:
+                handleTestTareReservoirRequest( message );
+                break;
+
             default:
                 // TODO - unrecognized message ID received - ignore
                 break;