Index: leahi_dialin/common/msg_ids.py
===================================================================
diff -u -re80743a725881349b68efb425707c3525bc300dd -r0c448c80b7715bdafadb963a6e3139a2311911c3
--- leahi_dialin/common/msg_ids.py	(.../msg_ids.py)	(revision e80743a725881349b68efb425707c3525bc300dd)
+++ leahi_dialin/common/msg_ids.py	(.../msg_ids.py)	(revision 0c448c80b7715bdafadb963a6e3139a2311911c3)
@@ -187,7 +187,8 @@
     MSG_ID_UI_RECIRCULATE_REQUEST = 0xA6
     MSG_ID_TD_RECIRCULATE_RESPONSE = 0xA7
     MSG_ID_TD_RECIRCULATE_DATA = 0xA8
-
+    MSG_ID_DD_SUBSTITUTION_PUMP_DATA = 0xA9
+    
     MSG_ID_DD_PISTON_PUMP_CONTROL_DATA = 0xF0
 
     MSG_ID_TD_TESTER_LOGIN_REQUEST = 0x8000