Index: firmware/App/Monitors/Level.h
===================================================================
diff -u -r8c5ca1982c53f4702c6f019ce9bcfedb9e513548 -r3ea4def3a3a69a00fb96b6089dbd097fa80041de
--- firmware/App/Monitors/Level.h	(.../Level.h)	(revision 8c5ca1982c53f4702c6f019ce9bcfedb9e513548)
+++ firmware/App/Monitors/Level.h	(.../Level.h)	(revision 3ea4def3a3a69a00fb96b6089dbd097fa80041de)
@@ -47,6 +47,7 @@
     LEVEL_STATE_LOW = 0,                 ///< Low level
     LEVEL_STATE_HIGH,                    ///< High level
     LEVEL_STATE_MEDIUM,                  ///< Medium level
+    LEVEL_STATE_ILLEGAL,                 ///< Illegal level
     NUM_OF_LEVELS_STATES                 ///< Number of level states
 } LEVEL_STATE_T;