Index: leahi_dialin/common/msg_ids.py
===================================================================
diff -u -rd2998e4771e53fd9fe97273de9a6f36d04fbb7b6 -r4d55f49b2e3282cc0d5730eb50b5df497c952069
--- leahi_dialin/common/msg_ids.py	(.../msg_ids.py)	(revision d2998e4771e53fd9fe97273de9a6f36d04fbb7b6)
+++ leahi_dialin/common/msg_ids.py	(.../msg_ids.py)	(revision 4d55f49b2e3282cc0d5730eb50b5df497c952069)
@@ -113,6 +113,7 @@
     MSG_ID_TD_TREATMENT_PAUSED_TIMER_DATA = 0x5B
     MSG_ID_DD_UF_DATA = 0x5C
     MSG_ID_FP_PERMEATE_TANK_DATA = 0x5D
+    MSG_ID_DD_SPENT_CHAMBER_FILL_DATA = 0x5E
     MSG_ID_DD_BLOOD_LEAK_DATA = 0x60
 
     MSG_ID_DD_PISTON_PUMP_CONTROL_DATA = 0xF0
@@ -240,15 +241,17 @@
     MSG_ID_DD_HEATERS_PWM_PERIOD_OVERRIDE_REQUEST = 0xA03C
     MSG_ID_DD_PRE_GEND_MODE_DATA_PUBLISH_OVERRIDE_REQUEST = 0xA03D
     MSG_ID_DD_POST_GEND_MODE_DATA_PUBLISH_OVERRIDE_REQUEST = 0xA03E
-    MSG_ID_DD_START_PRE_GEN_DIALYSATE_MODE_OVERRIDE_REQUEST = 0xA03F
-    MSG_ID_DD_STOP_PRE_GEN_DIALYSATE_MODE_OVERRIDE_REQUEST = 0xA040
-    MSG_ID_DD_STOP_GEN_DIALYSATE_MODE_OVERRIDE_REQUEST = 0xA041
+    MSG_ID_DD_AVAILABLE_TO_USE_3 = 0xA03F
+    MSG_ID_DD_SPENT_CHAMB_FILL_DATA_PUBLISH_OVERRIDE_REQUEST = 0xA040
+    MSG_ID_DD_AVAILABLE_TO_USE_4 = 0xA041
     MSG_ID_DD_SAFETY_SHUTDOWN_OVERRIDE_REQUEST = 0xA042
-    MSG_ID_DD_ALARM_STATE_OVERRIDE_REQUEST = 0xA043
 
     MSG_ID_DD_PISTON_PUMP_DATA_PUBLISH_OVERRIDE_REQUEST = 0xAF00
     MSG_ID_DD_PISTON_PUMP_START_STOP_OVERRIDE_REQUEST = 0xAF01
     MSG_ID_DD_PISTON_PUMP_FILL_AFTER_DISPENSE_OVERRIDE_REQUEST = 0xAF02
+    # Placeholder message
+    MSG_ID_DD_ALARM_STATE_OVERRIDE_REQUEST = 0xAF03
+    MSG_ID_DD_STOP_GEN_DIALYSATE_MODE_OVERRIDE_REQUEST = 0xAF04
 
     MSG_ID_FP_TESTER_LOGIN_REQUEST = 0xB000
     MSG_ID_FP_SOFTWARE_RESET_REQUEST = 0xB001