Index: firmware/App/Controllers/BPModule.c
===================================================================
diff -u -r750cdff300aa45c5eb5c651cb1b9a09c859ba268 -r74dd4df044948a45ba71b71269ff5b703072d310
--- firmware/App/Controllers/BPModule.c	(.../BPModule.c)	(revision 750cdff300aa45c5eb5c651cb1b9a09c859ba268)
+++ firmware/App/Controllers/BPModule.c	(.../BPModule.c)	(revision 74dd4df044948a45ba71b71269ff5b703072d310)
@@ -39,6 +39,7 @@
     BP_MODULE_IDLE_STATE = 0,                                                              ///< Blood Pressure idle state.
     BP_MODULE_MEASURE_STATE,                                                               ///< Blood pressure measurement state
     BP_MODULE_CHECK_STATE,                                                                 ///< Blood pressure validation state
+    NUM_OF_BP_MODULE_STATES                                                                ///< Number of blood pressure states.
 } BP_MODULE_STATE_T;
 
 // ********** private data **********
Index: firmware/App/Drivers/BPDriver.c
===================================================================
diff -u -r750cdff300aa45c5eb5c651cb1b9a09c859ba268 -r74dd4df044948a45ba71b71269ff5b703072d310
--- firmware/App/Drivers/BPDriver.c	(.../BPDriver.c)	(revision 750cdff300aa45c5eb5c651cb1b9a09c859ba268)
+++ firmware/App/Drivers/BPDriver.c	(.../BPDriver.c)	(revision 74dd4df044948a45ba71b71269ff5b703072d310)
@@ -30,6 +30,16 @@
 #define BP_MODULE_ERROR_MASK             0x40                                       ///< Blood pressure module error mask.
 #define BP_RESP_CODE_BPDATA              0x07                                       ///< Blood pressure response code indicating BP data is available.
 
+/// Blood pressure driver states.
+typedef enum
+{
+    BP_DRIVER_IDLE_STATE = 0,                                                       ///< Idle state.
+    BP_DRIVER_MEASURE_STATE,                                                        ///< Measurement state.
+    BP_DRIVER_GET_DATA_STATE,                                                       ///< Get data state.
+    BP_DRIVER_ERROR_STATE,                                                          ///< Error state.
+    NUM_OF_BP_DRIVER_STATES                                                         ///< Number of driver states.
+} BP_DRIVER_STATE_T;
+
 // ********** private data **********
 
 static BP_DRIVER_STATE_T bpDriverState = BP_DRIVER_IDLE_STATE;                      ///< Current blood pressure driver state.