Index: dialin/hd/air_trap.py
===================================================================
diff -u -r924c42da99eaad59a4565fbd5dfedfa68f5dfe25 -rf994f3ff2163edac03c480e1112a7c4b3ade7b76
--- dialin/hd/air_trap.py	(.../air_trap.py)	(revision 924c42da99eaad59a4565fbd5dfedfa68f5dfe25)
+++ dialin/hd/air_trap.py	(.../air_trap.py)	(revision f994f3ff2163edac03c480e1112a7c4b3ade7b76)
@@ -55,7 +55,7 @@
 
         if self.can_interface is not None:
             channel_id = DenaliChannels.hd_sync_broadcast_ch_id
-            msg_id = MsgIds.MSG_ID_HD_AIR_TRAP_DATA
+            msg_id = MsgIds.MSG_ID_HD_AIR_TRAP_DATA.value
             self.can_interface.register_receiving_publication_function(channel_id, msg_id,
                                                                        self._handler_air_trap_sync)
 
@@ -127,7 +127,7 @@
         payload = rst + det + idx
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
-                                              message_id=MsgIds.MSG_ID_DG_AIR_TRAP_LEVEL_SENSOR_OVERRIDE,
+                                              message_id=MsgIds.MSG_ID_DG_AIR_TRAP_LEVEL_SENSOR_OVERRIDE.value,
                                               payload=payload)
 
         self.logger.debug("override air trap level sensor detection value for sensor " + str(sensor))
@@ -160,7 +160,7 @@
         payload = rst + mis
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
-                                              message_id=MsgIds.MSG_ID_DG_AIR_TRAP_DATA_BROADCAST_INTERVAL_OVERRIDE,
+                                              message_id=MsgIds.MSG_ID_DG_AIR_TRAP_DATA_BROADCAST_INTERVAL_OVERRIDE.value,
                                               payload=payload)
 
         self.logger.debug("override HD air trap data broadcast interval")
Index: dialin/hd/hemodialysis_device.py
===================================================================
diff -u -re172ddc204389ba1eb69e14de52bd3b924087031 -rf994f3ff2163edac03c480e1112a7c4b3ade7b76
--- dialin/hd/hemodialysis_device.py	(.../hemodialysis_device.py)	(revision e172ddc204389ba1eb69e14de52bd3b924087031)
+++ dialin/hd/hemodialysis_device.py	(.../hemodialysis_device.py)	(revision f994f3ff2163edac03c480e1112a7c4b3ade7b76)
@@ -89,7 +89,7 @@
         # register handler for HD operation mode broadcast messages
         if self.can_interface is not None:
             channel_id = DenaliChannels.hd_sync_broadcast_ch_id
-            msg_id = MsgIds.MSG_ID_HD_OP_MODE
+            msg_id = MsgIds.MSG_ID_HD_OP_MODE.value
             self.can_interface.register_receiving_publication_function(channel_id, msg_id,
                                                                        self._handler_hd_op_mode_sync)
 
@@ -145,7 +145,7 @@
         """
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
-                                              message_id=MsgIds.MSG_ID_TESTER_LOGIN_REQUEST,
+                                              message_id=MsgIds.MSG_ID_TESTER_LOGIN_REQUEST.value,
                                               payload=list(map(int, map(ord, self.HD_LOGIN_PASSWORD))))
 
         self.logger.debug("Logging in...")
@@ -186,7 +186,7 @@
         payload = rst + saf
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
-                                              message_id=MsgIds.MSG_ID_HD_SAFETY_SHUTDOWN_OVERRIDE,
+                                              message_id=MsgIds.MSG_ID_HD_SAFETY_SHUTDOWN_OVERRIDE.value,
                                               payload=payload)
 
         self.logger.debug("overriding HD safety shutdown")
@@ -217,7 +217,7 @@
         """
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
-                                              message_id=MsgIds.MSG_ID_HD_SOFTWARE_RESET_REQUEST)
+                                              message_id=MsgIds.MSG_ID_HD_SOFTWARE_RESET_REQUEST.value)
 
         self.logger.debug("requesting HD software reset")