Index: firmware/App/Services/Reservoirs.h
===================================================================
diff -u -r304797ba69ef356e1e9436f81a624c01126d6cd1 -r5c967dc311b485769e50e5e4f122be21079b5ae9
--- firmware/App/Services/Reservoirs.h	(.../Reservoirs.h)	(revision 304797ba69ef356e1e9436f81a624c01126d6cd1)
+++ firmware/App/Services/Reservoirs.h	(.../Reservoirs.h)	(revision 5c967dc311b485769e50e5e4f122be21079b5ae9)
@@ -48,6 +48,14 @@
     U32 rejectCode;         ///< Reason code for rejecting the command
 } DG_CMD_RESPONSE_T;
 
+/// Reservoir data struct.
+typedef struct
+{
+    U32 activeReservoir;    ///< Active reservoir ID
+    U32 fillToVolumeMl;     ///< Volume target to fill to
+    U32 drainToVolumeMl;    ///< Volume target to drain to
+} RESERVOIR_DATA_T;
+
 #pragma pack(pop)
 
 // ********** public function prototypes **********