Index: firmware/App/Controllers/BalancingChamber.c
===================================================================
diff -u -ra631e128cd6be44aa232e23b58a229bfb8fe9043 -r788a0b1a638d815df1e83af80cba7be03af2020c
--- firmware/App/Controllers/BalancingChamber.c	(.../BalancingChamber.c)	(revision a631e128cd6be44aa232e23b58a229bfb8fe9043)
+++ firmware/App/Controllers/BalancingChamber.c	(.../BalancingChamber.c)	(revision 788a0b1a638d815df1e83af80cba7be03af2020c)
@@ -23,10 +23,11 @@
 #include "FpgaDD.h"
 #include "Heaters.h"
 #include "Level.h"
+#include "MessageSupport.h"
+#include "Messaging.h"
 #include "MixingControl.h"
 #include "ModeGenDialysate.h"
 #include "ModeStandby.h"
-#include "Messaging.h"
 #include "OperationModes.h"
 #include "Pressure.h"
 #include "TaskGeneral.h"
@@ -109,6 +110,8 @@
 
 //TODO: remove later once level sensor working
 static U32 bicarbChamberPeriodicFillCounter;  
+// Balancing chamber state change tracker
+static BAL_CHAMBER_EXEC_STATE_T prevBalChamberState;                                            ///< Balancing chamber Previous State tracking variable
 
 // ********** private function prototypes **********
 
@@ -185,6 +188,7 @@
     pendingTdDialysateFlowrate                  = 0.0F;
     isBalChamberSwitchingPeriodUpdatePending    = FALSE;
     bcSwitchingBasedOnClosedPeriodCounter       = 0;
+    prevBalChamberState                         = BAL_CHAMBER_STATE_IDLE;
     //TODO:remove once level sensor working
     bicarbChamberPeriodicFillCounter            = 0;
 }
@@ -357,8 +361,8 @@
 /*********************************************************************//**
  * @brief
  * The execBalancingChamberControl function executes the balancing chamber state machine.
- * @details \b Inputs: balChamberExecState
- * @details \b Outputs: balChamberExecState
+ * @details \b Inputs: balChamberExecState, prevBalChamberState
+ * @details \b Outputs: balChamberExecState prevBalChamberState
  * @details \b Alarm: ALARM_ID_DD_SOFTWARE_FAULT when wrong balancing chamber state invoked.
  * @return current state.
  *************************************************************************/
@@ -443,6 +447,17 @@
             break;
     }
 
+    if ( prevBalChamberState != balChamberExecState )
+    {
+        if ( ( BAL_CHAMBER_STATE_IDLE == balChamberExecState ) ||
+             ( BAL_CHAMBER_STATE1_FILL_START == balChamberExecState ) ||
+             ( BAL_CHAMBER_STATE2_FILL_START == balChamberExecState ) )
+        {
+            SEND_EVENT_WITH_2_U32_DATA( DD_EVENT_BC_STATE_CHANGE, prevBalChamberState, balChamberExecState );
+        }
+    }
+    prevBalChamberState = balChamberExecState;
+
     //Publish balancing chamber data
     publishBalChamberData();
 
@@ -1494,14 +1509,15 @@
  * @brief
  * The setBalChamberSwitchingOnlyStatus function sets the balancing chamber
  * switching only On/Off status.
- * @details \b Inputs: balanceChamberSwitchingOnly
+ * @details \b Inputs: balanceChamberSwitchingOnly, isBalChamberSwitchingActive
  * @details \b Outputs: none
  * @param OnOff to set the BC switch status
  * @return none
  *************************************************************************/
 void setBalChamberSwitchingOnlyStatus( BOOL OnOff )
 {
     balanceChamberSwitchingOnly = OnOff;
+    SEND_EVENT_WITH_2_U32_DATA( DD_EVENT_BC_SWITCH_ONLY_MODE_CHANGE, balanceChamberSwitchingOnly, isBalChamberSwitchingActive );
 }
 
 /*********************************************************************//**