Index: firmware/App/Modes/OperationModes.c
===================================================================
diff -u -r992dce16d63424ddd30fe9ac2f819e9a53b21977 -r2468e56fbecd26da713bc78535bd727f4b105fe1
--- firmware/App/Modes/OperationModes.c	(.../OperationModes.c)	(revision 992dce16d63424ddd30fe9ac2f819e9a53b21977)
+++ firmware/App/Modes/OperationModes.c	(.../OperationModes.c)	(revision 2468e56fbecd26da713bc78535bd727f4b105fe1)
@@ -122,6 +122,7 @@
 void execOperationModes( void )
 {
     DG_OP_MODE_T newMode;
+    U32 priorSubMode = currentSubMode;
 
     // any new mode requests?
     newMode = arbitrateModeRequest();   // will return current mode if no pending requests
@@ -197,6 +198,13 @@
             break;
     }
 
+    // Send sub-mode change event when appropriate
+    if ( priorSubMode != currentSubMode )
+    {
+        SEND_EVENT_WITH_2_U32_DATA( DG_EVENT_SUB_MODE_CHANGE, priorSubMode, currentSubMode );
+    }
+    priorSubMode = currentSubMode;
+
     // publish op mode on interval
     broadcastOperationMode();
 }
@@ -296,6 +304,8 @@
  *************************************************************************/
 static void transitionToNewOperationMode( DG_OP_MODE_T newMode )
 {
+    SEND_EVENT_WITH_2_U32_DATA( DG_EVENT_OP_MODE_CHANGE, lastMode, newMode );
+
     // setup for new operating mode
     switch ( newMode )
     {