Index: dialin/ui/hd_simulator.py
===================================================================
diff -u -rc32591086c6d9696c63f3d282818280651cca4be -r450bccc8031f2734114ab4de292825b748c973e4
--- dialin/ui/hd_simulator.py	(.../hd_simulator.py)	(revision c32591086c6d9696c63f3d282818280651cca4be)
+++ dialin/ui/hd_simulator.py	(.../hd_simulator.py)	(revision 450bccc8031f2734114ab4de292825b748c973e4)
@@ -174,7 +174,7 @@
         payload = bytearray(0x01)
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.hd_to_ui_ch_id,
-                                              message_id=MsgIds.MSG_ID_OFF_BUTTON_PRESS,
+                                              message_id=MsgIds.MSG_ID_OFF_BUTTON_PRESS.value,
                                               payload=payload)
 
         self.can_interface.send(message, 0)
@@ -204,7 +204,7 @@
         payload = integer_to_bytearray(1)
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.hd_to_ui_ch_id,
-                                              message_id=MsgIds.MSG_ID_OFF_BUTTON_PRESS,
+                                              message_id=MsgIds.MSG_ID_OFF_BUTTON_PRESS.value,
                                               payload=payload)
 
         self.can_interface.send(message, 0)