Index: firmware/App/Drivers/GPIO.c
===================================================================
diff -u -r9ed40798a5f4779db8a07bb6e256f7de99660108 -rf66ffb2807dae4ad719d41520bc8c3739210bfd0
--- firmware/App/Drivers/GPIO.c	(.../GPIO.c)	(revision 9ed40798a5f4779db8a07bb6e256f7de99660108)
+++ firmware/App/Drivers/GPIO.c	(.../GPIO.c)	(revision f66ffb2807dae4ad719d41520bc8c3739210bfd0)
@@ -31,6 +31,9 @@
 #define WD_PET_GIO_PORT_PIN         1U                                                              ///< Watchdog pet GPIO pin number.
 #define WD_EXP_GIO_PORT_PIN         0U                                                              ///< Watchdog expired GPIO pin number.
 
+#define GPIO_AC_SWITCH_MASK         0x10U                                                           ///< AC switch status bit mask (concentrate cap switch per HDD).
+#define GPIO_LEAK_SENSOR_MASK       0x04U                                                           ///< Leak sensor status bit mask (per HDD - update if different).
+
 #define GET_WD_EXP()       ( PIN_SIGNAL_STATE_T )( gioGetBit( gioPORTB, WD_EXP_GIO_PORT_PIN ) )     ///< Get watchdog expired pin state macro.
 #define TGL_WD_PET()       gioToggleBit( gioPORTB, WD_PET_GIO_PORT_PIN )                            ///< Macro to toggle watchdog pet signal state.
 
@@ -95,7 +98,7 @@
  * @brief
  * The getGPIOStatusFromFPGA function returns the latest GPIO status register
  * value reported by the DD FPGA.
- * @details \b Inputs: fpgaSensorReadings.fpgaGPIOStatus
+ * @details \b Inputs: fpgaSensorReadings.fpgaGPIOStatus (via FpgaDD service)
  * @details \b Outputs: none
  * @return GPIO status register value (bit-mapped per HDD definition)
  *************************************************************************/
@@ -104,4 +107,37 @@
     return getFPGAGPIOStatus();
 }
 
+/*********************************************************************//**
+ * @brief
+ * The getACSwitchStatus function returns the AC switch (concentrate cap
+ * switch) status from the FPGA GPIO register.
+ * @details \b Inputs: fpgaSensorReadings.fpgaGPIOStatus (via getGPIOStatusFromFPGA)
+ * @details \b Outputs: none
+ * @return TRUE if AC switch is asserted, FALSE otherwise
+ *************************************************************************/
+BOOL getACSwitchStatus( void )
+{
+    U08 gpioStatus = getGPIOStatusFromFPGA();
+    BOOL isAsserted = ( ( gpioStatus & GPIO_AC_SWITCH_MASK ) != 0U ) ? TRUE : FALSE;
+
+    return isAsserted;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The getLeakSensorStatus function returns the leak sensor status from the
+ * FPGA GPIO register. Application code should trigger an alarm when
+ * LEAK_SENSOR_DETECTED is returned (e.g. in a monitor task).
+ * @details \b Inputs: fpgaSensorReadings.fpgaGPIOStatus (via getGPIOStatusFromFPGA)
+ * @details \b Outputs: none
+ * @return LEAK_SENSOR_NOT_DETECTED or LEAK_SENSOR_DETECTED
+ *************************************************************************/
+LEAK_SENSOR_STATUS_T getLeakSensorStatus( void )
+{
+    U08 gpioStatus = getGPIOStatusFromFPGA();
+    LEAK_SENSOR_STATUS_T status = ( ( gpioStatus & GPIO_LEAK_SENSOR_MASK ) != 0U ) ? LEAK_SENSOR_DETECTED : LEAK_SENSOR_NOT_DETECTED;
+
+    return status;
+}
+
 /**@}*/