Index: firmware/App/Modes/OperationModes.c
===================================================================
diff -u -rc13864f02c391265d9d369a6c2d606d9de0f91f2 -r862620800213fc9bbd9ec95079246c4323c79a4b
--- firmware/App/Modes/OperationModes.c	(.../OperationModes.c)	(revision c13864f02c391265d9d369a6c2d606d9de0f91f2)
+++ firmware/App/Modes/OperationModes.c	(.../OperationModes.c)	(revision 862620800213fc9bbd9ec95079246c4323c79a4b)
@@ -155,6 +155,7 @@
     if ( currentMode != newMode )
     {
         // handle transition to new mode
+
         lastMode = currentMode;
         transitionToNewOperationMode( newMode );
         currentMode = newMode;
@@ -329,6 +330,7 @@
 {
     SEND_EVENT_WITH_2_U32_DATA( DG_EVENT_OP_MODE_CHANGE, lastMode, newMode )
 
+    U32 priorSubMode = currentSubMode;
     // setup for new operating mode
     switch ( newMode )
     {
@@ -375,6 +377,11 @@
             SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, SW_FAULT_ID_OP_MODES_INVALID_MODE_TO_TRANSITION_TO, (U32)newMode )
             break;
     }
+    // Send sub-mode change event when appropriate
+    if ( priorSubMode != currentSubMode )
+    {
+        SEND_EVENT_WITH_2_U32_DATA( DG_EVENT_SUB_MODE_CHANGE, priorSubMode, currentSubMode )
+    }
 }
 
 /*********************************************************************//**