diff --git a/flight/PiOS/STM32F4xx/pios_bl_helper.c b/flight/PiOS/STM32F4xx/pios_bl_helper.c
index 967c3c7e6..039a9791a 100644
--- a/flight/PiOS/STM32F4xx/pios_bl_helper.c
+++ b/flight/PiOS/STM32F4xx/pios_bl_helper.c
@@ -32,7 +32,7 @@
 #include "pios.h"
 #if defined(PIOS_INCLUDE_BL_HELPER)
 #include <pios_board_info.h>
-#include "stm32f10x_flash.h"
+#include "stm32f4xx_flash.h"
 
 uint8_t *PIOS_BL_HELPER_FLASH_If_Read(uint32_t SectorAddress)
 {
@@ -97,6 +97,5 @@ void PIOS_BL_HELPER_FLASH_Read_Description(uint8_t * array, uint8_t size)
 
 void PIOS_BL_HELPER_CRC_Ini()
 {
-	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_CRC, ENABLE);
 }
 #endif
diff --git a/flight/PiOS/STM32F4xx/pios_sys.c b/flight/PiOS/STM32F4xx/pios_sys.c
index 416ec5667..1944be7b9 100644
--- a/flight/PiOS/STM32F4xx/pios_sys.c
+++ b/flight/PiOS/STM32F4xx/pios_sys.c
@@ -35,6 +35,8 @@
 
 #if defined(PIOS_INCLUDE_SYS)
 
+#define MEM8(addr)  (*((volatile uint8_t  *)(addr)))
+
 /* Private Function Prototypes */
 static void NVIC_Configuration(void);
 
@@ -224,6 +226,27 @@ uint32_t PIOS_SYS_getCPUFlashSize(void)
 	return ((uint32_t) MEM_SIZE);	// it might be possible to locate in the OTP area, but haven't looked and not documented
 }
 
+/**
+ * Returns the serial number as a string
+ * param[out] str pointer to a string which can store at least 32 digits + zero terminator!
+ * (24 digits returned for STM32)
+ * return < 0 if feature not supported
+ */
+int32_t PIOS_SYS_SerialNumberGetBinary(uint8_t *array)
+{
+	int i;
+	
+	/* Stored in the so called "electronic signature" */
+	for (i = 0; i < 12; ++i) {
+		uint8_t b = MEM8(0x1ffff7e8 + i);
+		
+		array[i] = b;
+	}
+	
+	/* No error */
+	return 0;
+}
+
 /**
 * Returns the serial number as a string
 * param[out] str pointer to a string which can store at least 32 digits + zero terminator!
diff --git a/flight/Project/OpenPilotOSX/OpenPilotOSX.xcodeproj/project.pbxproj b/flight/Project/OpenPilotOSX/OpenPilotOSX.xcodeproj/project.pbxproj
index d435e3d14..70312417e 100644
--- a/flight/Project/OpenPilotOSX/OpenPilotOSX.xcodeproj/project.pbxproj
+++ b/flight/Project/OpenPilotOSX/OpenPilotOSX.xcodeproj/project.pbxproj
@@ -115,6 +115,7 @@
 		657CEEBB121DBC63007A1FBE /* WorldMagModel.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = WorldMagModel.c; sourceTree = "<group>"; };
 		657CF024121F49CD007A1FBE /* WMMInternal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WMMInternal.h; sourceTree = "<group>"; };
 		657FF86A12EA8BFB00801617 /* pios_pwm_priv.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = pios_pwm_priv.h; sourceTree = "<group>"; };
+		6581785414A65B9B0007885F /* pios_bl_helper.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = pios_bl_helper.c; sourceTree = "<group>"; };
 		6589A972131DDE93006BD67C /* FreeRTOSConfig.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FreeRTOSConfig.h; sourceTree = "<group>"; };
 		6589A983131DE24F006BD67C /* taskmonitor.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = taskmonitor.c; sourceTree = "<group>"; };
 		6589A9DB131DEE76006BD67C /* pios_rtc.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = pios_rtc.c; sourceTree = "<group>"; };
@@ -3901,6 +3902,7 @@
 				65904EC314613B6100FD9482 /* link_STM32F4xx_OP_memory.ld */,
 				65904EC414613B6100FD9482 /* link_STM32F4xx_sections.ld */,
 				65904EC514613B6100FD9482 /* pios_adc.c */,
+				6581785414A65B9B0007885F /* pios_bl_helper.c */,
 				65904EC614613B6100FD9482 /* pios_bma180.c */,
 				65904EC714613B6100FD9482 /* pios_bmp085.c */,
 				65904EC814613B6100FD9482 /* pios_debug.c */,
diff --git a/flight/Revolution/Makefile b/flight/Revolution/Makefile
index 201c60a92..e74d22971 100644
--- a/flight/Revolution/Makefile
+++ b/flight/Revolution/Makefile
@@ -49,7 +49,7 @@ endif
 FLASH_TOOL = OPENOCD
 
 # List of modules to include
-MODULES = Sensors Attitude/revolution ManualControl Stabilization Altitude/revolution Actuator GPS Telemetry
+MODULES = Sensors Attitude/revolution ManualControl Stabilization Altitude/revolution Actuator GPS Telemetry FirmwareIAP
 PYMODULES = 
 #FlightPlan