Index: firmware/App/Drivers/ConductivitySensors.h
===================================================================
diff -u -r89f18a07a6d5837bf9b4559a69046e2b06f32c35 -r895a48e398bbd9621425f781f9ff7974fb3dd523
--- firmware/App/Drivers/ConductivitySensors.h	(.../ConductivitySensors.h)	(revision 89f18a07a6d5837bf9b4559a69046e2b06f32c35)
+++ firmware/App/Drivers/ConductivitySensors.h	(.../ConductivitySensors.h)	(revision 895a48e398bbd9621425f781f9ff7974fb3dd523)
@@ -36,6 +36,9 @@
  */
 
 // ********** public definitions **********
+#define DOUBLE_COUNT                8                                    ///< Number of double values in Teensy EEPROM data
+#define FLOAT_COUNT                 ((128 - (DOUBLE_COUNT * 8)) / 4)     ///< Number of float values in Teensy EEPROM data
+#define MAX_CONDUCTIVITY_SENSOR     6
 
 /// Enumeration of conductivity sensors.
 typedef enum ConductivitySensors
@@ -54,6 +57,64 @@
     NUM_OF_CONDUCTIVITY_SENSORS                     ///< Number of conductivity sensors
 } CONDUCTIVITY_SENSORS_T;
 
+///  Structure to receive Sensor Measurement data from Teensy
+#pragma pack(push, 1)
+typedef struct
+{
+    U32 sensorNum;                                  ///< Conductivity Sensor number i.e unit 1 to 6.
+    F32 impFreq;                                    ///< Impedance Frequency
+    U32 impDataPoints;                              ///< Impedance Data Points. Hard coded to 1
+    F32 impRzMag;                                   ///< Value of medianMag
+    F32 impRzPhase;                                 ///< Value of medianPhase
+    F32 rtdFreq;                                    ///< RTD Frequency. Hard coded to 0.0
+    U32 rtdDataPoints;                              ///< Impedance Data Points. Hard coded to 1
+    F32 rtdRzMag;                                   ///< Value of rtd_resistance
+    F32 rtdRzPhase;                                 ///< RTD Rz Phase. Hard coded to 0.0
+} CONDUCTIVITY_SENSOR_DATA_T;
+#pragma pack(pop)
+
+/// Structure to receive EEPROM data from Teensy. These are coefficient values to calculate conductivity and temperature.
+#pragma pack(push, 1)
+typedef struct
+{
+    F64 doubleValue[DOUBLE_COUNT];                  ///< Double Values stored in the EEPROM
+    F32 floatValue[FLOAT_COUNT];                    ///< Float Values stored in the EEPROM
+} CONDUCTIVITY_EEPROM_DATA_T;
+#pragma pack(pop)
+
+///  Structure to receive conductivity measurement settings from Teensy
+#pragma pack(push, 1)
+typedef struct
+{
+    F32 SinFreq;
+    F32 DacVoltPP;
+    F32 BiasVolt;
+    U32 HstiaRtiaSel;
+    U32 AdcPgaGain;
+    U32 DftNum;
+    U32 ADCAvgNum;
+} CONDUCTIVITY_MEASUREMENT_SETTINGS_T;
+#pragma pack(pop)
+
+/// Initialization status of all the sensors connected to Teensy
+typedef enum Conductivity_Init_Status
+{
+    CONDUCTIVITY_INIT_STATUS_UNITIALIZED = 0,       ///< The initialization process has not started.
+    CONDUCTIVITY_INIT_STATUS_IN_PROGRESS,           ///< The initialization process has started.
+    CONDUCTIVITY_INIT_STATUS_INITIALIZED,           ///< Initialization process completed and all the sensors were initialized successfully.
+    CONDUCTIVITY_INIT_STATUS_FAILED                 ///< Initialization process completed but one or more sensor was not initialized properly.
+}CONDUCTIVITY_INIT_STATUS_T;
+
+
+typedef enum Conductivity_Parse_Status
+{
+    CONDUCTIVITY_PARSE_SUCCESS = 0,
+    CONDUCTIVITY_PARSE_ERROR_NULL_BUFFER,
+    CONDUCTIVITY_PARSE_ERROR_INVALID_LENGTH,
+    CONDUCTIVITY_PARSE_ERROR_INVALID_SENSOR_NUM
+} CONDUCTIVITY_PARSE_STATUS;
+
+
 // ********** public function prototypes **********
 
 void initConductivitySensors( void );