Index: MessagePayloads.h
===================================================================
diff -u -rdb4dbd99bd5cbabe4e46fa590f9580ce3d4cb254 -rd01a89232711f7a014fa44fa12203595b9501e07
--- MessagePayloads.h	(.../MessagePayloads.h)	(revision db4dbd99bd5cbabe4e46fa590f9580ce3d4cb254)
+++ MessagePayloads.h	(.../MessagePayloads.h)	(revision d01a89232711f7a014fa44fa12203595b9501e07)
@@ -99,6 +99,19 @@
     F32 currentQd;                         ///< Current dialysate flow rate (ml/min)
 } GEN_DIALYSATE_MODE_DATA_T;
 
+/// balancing chamber data structure
+typedef struct
+{
+    U32 balChamberExecState;                                            ///< Balancing chamber execution state
+    U32 balChamberSWState;                                              ///< Balancing chamber switching state (state 1 or state 2)
+    F32 balChamberSWFreq;                                               ///< Balancing chamber switching frequency
+    BOOL isSpentFillComplete;                                           ///< Whether balancing chamber spent fill completed or not
+    U32 currentBalChamberSwitchingCounter;                              ///< Current balancing chamber switching counter
+    BOOL isPressureStabilizedDuringFill;                                ///< Whether pressure stabilized during fill or not
+    BOOL balChamberSWOnlyState;                                         ///< Balancing chamber switching only status ( On/Off)
+    BOOL isBalChamberSwitchingActive;                                   ///< Balancing chamber switching status
+} BAL_CHAMBER_DATA_T;
+
 /// Chamber H vent open request data
 typedef struct
 {