Index: dialin/common/msg_defs.py
===================================================================
diff -u -r58ebcc0edb2e2aae8166630eb5d5d984d9ad3817 -rd825321ce3b39a8119e6cabfcdc3b1408234dade
--- dialin/common/msg_defs.py	(.../msg_defs.py)	(revision 58ebcc0edb2e2aae8166630eb5d5d984d9ad3817)
+++ dialin/common/msg_defs.py	(.../msg_defs.py)	(revision d825321ce3b39a8119e6cabfcdc3b1408234dade)
@@ -8,7 +8,7 @@
 # @file msg_defs.py
 #
 # @author (last) Peter Lucia
-# @date (last) 07-Aug-2020
+# @date (last) 14-Oct-2020
 # @author (original) Peter Lucia
 # @date (original) 07-Aug-2020
 #
@@ -74,8 +74,9 @@
     MSG_ID_DG_HEAT_DISINFECT_DATA = 0x37                        # DG heat disinfection publish data
     MSG_ID_UI_START_TREATMENT = 0x38                            # UI user request to initiate a treatment
     MSG_ID_HD_START_TREATMENT_RESPONSE = 0x39                   # HD response to user request to initiate a treatment
-    MSG_ID_HD_VALVES_DATA = 0x3A                                # HD broadcast of valves data
-    MSG_ID_UI_USER_CONFIRM_TREATMENT_PARAMS = 0x3B              # UI user confirmation of treatment parameters
+    MSG_ID_UI_ALARM_ACKNOWLEDGE = 0x3F                          # UI Tells HD an alarm has been acknowledged
+    MSG_ID_HD_VALVES_DATA = 0x3B                                # HD broadcast of valves data
+    MSG_ID_UI_USER_CONFIRM_TREATMENT_PARAMS = 0x3A              # UI user confirmation of treatment parameters
     MSG_ID_UI_TREATMENT_END_REQUEST = 0x3C                      # UI user treatment end request
     MSG_ID_HD_TREATMENT_END_RESPONSE = 0x3D                     # HD response to user request to end treatment
     MSG_ID_HD_AIR_TRAP_DATA = 0x003E                            # HD broadcast of air trap data
@@ -173,9 +174,9 @@
     MSG_ID_HEAT_DISINFECT_RSRVR2_TO_RSRVR1_DURATION_MINS = 0xA01F    # Heat disinfection reservoir 2 to reservoir 1 duration in minutes
     MSG_ID_HEAT_DISINFECT_NO_OF_CYCLES_TO_RUN = 0xA020          # Heat disinfection number of cycles to run
     MSG_ID_HEAT_DISINFECT_PUBLISH_INTERVAL_OVERRIDE = 0xA021    # Heat disinfection data publish interval override request
+    MSG_ID_PRIMING_STATUS = 0x0037                              # The priming status
     MSG_ID_DG_SOFTWARE_RESET_REQUEST = 0xA022                   # DG reset request
     MSG_ID_HD_VALVES_SET_BLOOD_TRAP_VALVE = 0x8030              # HD valves set blood trap valve state
-
     MSG_ID_HD_DEBUG_EVENT = 0xFFF1                              # HD debug event text to be logged in event log
     MSG_ID_DG_DEBUG_EVENT = 0xFFF2                              # DG debug event text to be logged in event log
 
Index: dialin/hd/hemodialysis_device.py
===================================================================
diff -u -r58ebcc0edb2e2aae8166630eb5d5d984d9ad3817 -rd825321ce3b39a8119e6cabfcdc3b1408234dade
--- dialin/hd/hemodialysis_device.py	(.../hemodialysis_device.py)	(revision 58ebcc0edb2e2aae8166630eb5d5d984d9ad3817)
+++ dialin/hd/hemodialysis_device.py	(.../hemodialysis_device.py)	(revision d825321ce3b39a8119e6cabfcdc3b1408234dade)
@@ -38,8 +38,8 @@
 
 class HD(_AbstractSubSystem):
     """
-    Hemodialysis Device (HD) Dialin object API.  It provides the basic interface to communicate with
-    the HD firmware.
+    Hemodialysis Device (HD) Dialin object API.
+    It provides the basic interface to communicate with the HD firmware.
     """
 
     # broadcast message field positions