Index: dialin/common/hd_defs.py
===================================================================
diff -u -rb3ccd0073b7c5ba27457a4b7cdd3e60b3a8d3d68 -r4a14fb08755f069501169e63a652d8681135462c
--- dialin/common/hd_defs.py	(.../hd_defs.py)	(revision b3ccd0073b7c5ba27457a4b7cdd3e60b3a8d3d68)
+++ dialin/common/hd_defs.py	(.../hd_defs.py)	(revision 4a14fb08755f069501169e63a652d8681135462c)
@@ -120,4 +120,30 @@
     STANDBY_DG_FLUSH_IN_PROGRESS_STATE              = 3 # DG flush operation is in progress
     STANDBY_DG_HEAT_DISINFECT_IN_PROGRESS_STATE     = 4 # DG heat disinfection operation is in progress
     STANDBY_DG_CHEM_DISINFECT_IN_PROGRESS_STATE     = 5 # DG chemical disinfection operation is in progress
-    NUM_OF_STANDBY_STATES                           = 6 # Number of standby states (sub-modes)
\ No newline at end of file
+    NUM_OF_STANDBY_STATES                           = 6 # Number of standby states (sub-modes)
+
+class DG_Heat_States(DialinEnum): # although it is a dg state and the file is hd_defs since we don't have dg_defs I put it here.
+    DG_HEAT_DISINFECT_STATE_START                       =  0 # Heat disinfect, start mode state
+    DG_HEAT_DISINFECT_STATE_DRAIN_R1                    =  1 # Heat disinfect, drain R1 state
+    DG_HEAT_DISINFECT_STATE_DRAIN_R2                    =  2 # Heat disinfect, drain R2 state
+    DG_HEAT_DISINFECT_STATE_FLUSH_DRAIN                 =  3 # Heat disinfect, flush drain state
+    DG_HEAT_DISINFECT_STATE_FLUSH_CIRCULATION           =  4 # Heat disinfect, flush circulation state
+    DG_HEAT_DISINFECT_STATE_FLUSH_R1_AND_R2             =  5 # Heat disinfect, flush R1 and R2 state
+    DG_HEAT_DISINFECT_STATE_FLUSH_R2_AND_DRAIN_R1       =  6 # Heat disinfect, flush R2 and drain R1 state
+    DG_HEAT_DISINFECT_STATE_FLUSH_DRAIN_R2              =  7 # Heat disinfect, flush drain R2 state
+    DG_HEAT_DISINFECT_STATE_FLUSH_DRAIN_R1              =  8 # Heat disinfect, flush drain R1 state
+    DG_HEAT_DISINFECT_STATE_FILL_WITH_WATER             =  9 # Heat disinfect, fill with water state
+    DG_HEAT_DISINFECT_STATE_DISINFECT_R1_TO_R2          = 10 # Heat disinfect, disinfect R1 to R2 state
+    DG_HEAT_DISINFECT_STATE_FILL_R2_WITH_HOT_WATER      = 11 # Heat disinfect, fill R2 with hot water state
+    DG_HEAT_DISINFECT_STATE_DISINFECT_R2_TO_R1          = 12 # Heat disinfect, disinfect R2 to R1 state
+    DG_HEAT_DISINFECT_STATE_COOL_DOWN_HEATERS           = 13 # Heat disinfect, cool down heaters state
+    DG_HEAT_DISINFECT_STATE_COOL_DOWN_RO_FILTER         = 14 # Heat disinfect, cool down RO filter state
+    DG_HEAT_DISINFECT_STATE_MIX_DRAIN_R1                = 15 # Heat disinfect, mix drain R1 state
+    DG_HEAT_DISINFECT_STATE_MIX_DRAIN_R2                = 16 # Heat disinfect, mix drain R2 state
+    DG_HEAT_DISINFECT_STATE_RINSE_R1_TO_R2              = 17 # Heat disinfect, rinse R1 to R2 state
+    DG_HEAT_DISINFECT_STATE_RINSE_R2_TO_R1_AND_DRAIN_R1 = 18 # Heat disinfect, rinse R2 to R1 and drain R1 state
+    DG_HEAT_DISINFECT_STATE_RINSE_CIRCULATION           = 19 # Heat disinfect, rinse circulation state
+    DG_HEAT_DISINFECT_STATE_CANCEL_BASIC_PATH           = 20 # Heat disinfect, cancel mode basic path state
+    DG_HEAT_DISINFECT_STATE_CANCEL_WATER_PATH           = 21 # Heat disinfect, cancel mode water path state
+    DG_HEAT_DISINFECT_STATE_COMPLETE                    = 22 # Heat disinfect, complete state
+    NUM_OF_DG_HEAT_DISINFECT_STATES                     = 23 # Number of heat disinfect mode states
Index: dialin/common/msg_defs.py
===================================================================
diff -u -r3ecee312b820f6e96da728ac2d233539310e856a -r4a14fb08755f069501169e63a652d8681135462c
--- dialin/common/msg_defs.py	(.../msg_defs.py)	(revision 3ecee312b820f6e96da728ac2d233539310e856a)
+++ dialin/common/msg_defs.py	(.../msg_defs.py)	(revision 4a14fb08755f069501169e63a652d8681135462c)
@@ -125,6 +125,9 @@
     MSG_ID_UI_TREATMENT_LOG_DATA_REQUEST                = 0x75  # UI request treatment log data message
     MSG_ID_HD_TREATMENT_LOG_DATA_RESPONSE               = 0x76  # HD response to UI treatment log data request
 
+    MSG_ID_DG_DISINFECT_STATE                           = 0x7E  # DG disinfect states
+
+
     MSG_ID_CAN_ERROR_COUNT = 0x999                              # test code in support of EMC testing
 
 
Index: dialin/ui/hd_simulator.py
===================================================================
diff -u -r3ecee312b820f6e96da728ac2d233539310e856a -r4a14fb08755f069501169e63a652d8681135462c
--- dialin/ui/hd_simulator.py	(.../hd_simulator.py)	(revision 3ecee312b820f6e96da728ac2d233539310e856a)
+++ dialin/ui/hd_simulator.py	(.../hd_simulator.py)	(revision 4a14fb08755f069501169e63a652d8681135462c)
@@ -2079,3 +2079,22 @@
                                               payload=payload)
 
         self.can_interface.send(message, 0)
+
+    def cmd_send_dg_disinfection_state(self, subMode, flushMode, heatMode, chemicalMode):
+        """
+        Broadcasts the current DG disinfection mode
+        :param subMode (int): disinfect states
+        :param flushMode (int): flush states
+        :param heatMode (int): heat states
+        :param ChemicalMode (int): chemical states
+        :return:
+        """
+        payload = integer_to_bytearray(subMode)
+        payload += integer_to_bytearray(flushMode)
+        payload += integer_to_bytearray(heatMode)
+        payload += integer_to_bytearray(chemicalMode)
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dg_sync_broadcast_ch_id,
+                                              message_id=MsgIds.MSG_ID_DG_DISINFECT_STATE.value,
+                                              payload=payload)
+        self.can_interface.send(message, 0)