diff --git a/flight/PiOS/STM32F10x/pios_usb_hid.c b/flight/PiOS/STM32F10x/pios_usb_hid.c
index 750350457..5d76159f8 100644
--- a/flight/PiOS/STM32F10x/pios_usb_hid.c
+++ b/flight/PiOS/STM32F10x/pios_usb_hid.c
@@ -53,7 +53,7 @@ static uint8_t rx_buffer[PIOS_USB_HID_DATA_LENGTH] = {0};
 
 static uint8_t transmit_remaining;
 static uint8_t *p_tx_buffer;
-static uint8_t tx_buffer[PIOS_USB_HID_DATA_LENGTH] = {0};
+static uint8_t tx_buffer[PIOS_USB_HID_DATA_LENGTH+2] = {0};
 
 /**
 * Initialises USB COM layer
@@ -86,6 +86,7 @@ int32_t PIOS_USB_HID_Init(uint32_t mode)
 	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, ENABLE);
 	
 	USB_Init();
+	USB_SIL_Init();
 	PIOS_LED_On(LED2);	
 	
 	return 0; /* No error */
@@ -126,15 +127,16 @@ int32_t PIOS_USB_HID_CheckAvailable(uint8_t id)
   */
 void PIOS_USB_HID_TxNextByte()
 {
-	uint8_t buf[2];
+	uint8_t buf[3];
 	if( transmit_remaining > 0 ) {
 		transmit_remaining--;
 		buf[0] = 1; // report ID 1
-		buf[1] = *p_tx_buffer;
+		buf[1] = 1; // *p_tx_buffer;
+		buf[2] = 1;
 		p_tx_buffer++;
 		
-		UserToPMABufferCopy((uint8_t*) buf, GetEPTxAddr(EP1_IN & 0x7F), 2);
-		SetEPTxCount((EP1_IN & 0x7F), 2);
+		UserToPMABufferCopy((uint8_t*) buf, GetEPTxAddr(EP1_IN & 0x7F), 3);
+		SetEPTxCount((EP1_IN & 0x7F), 3);
 		
 		/* Send Buffer */
 		SetEPTxValid(ENDP1);
@@ -158,11 +160,14 @@ int32_t PIOS_USB_HID_TxBufferPutMoreNonBlocking(uint8_t id, const uint8_t *buffe
 		return -1;
 	}	
 	
-	memcpy(&tx_buffer[0], buffer, len);
-	transmit_remaining = len;
-	p_tx_buffer = tx_buffer;
+	memcpy(&tx_buffer[2], buffer, len);
+	tx_buffer[0] = 1; /* report ID */
+	tx_buffer[1] = len; /* valid data length */
+	UserToPMABufferCopy((uint8_t*) tx_buffer, GetEPTxAddr(EP1_IN & 0x7F), len+2);
+//	SetEPTxCount((EP1_IN & 0x7F), 10);
 	
-	PIOS_USB_HID_TxNextByte();
+	/* Send Buffer */
+	SetEPTxValid(ENDP1);
 	
 	return 0;
 }
diff --git a/flight/PiOS/STM32F10x/pios_usb_hid_desc.c b/flight/PiOS/STM32F10x/pios_usb_hid_desc.c
index 564bc9c52..12f212c69 100644
--- a/flight/PiOS/STM32F10x/pios_usb_hid_desc.c
+++ b/flight/PiOS/STM32F10x/pios_usb_hid_desc.c
@@ -16,6 +16,7 @@
 /* Includes ------------------------------------------------------------------*/
 #include "usb_lib.h"
 #include "pios_usb.h"
+#include "pios_usb_hid.h"
 #include "pios_usb_hid_desc.h"
 
 /* Private typedef -----------------------------------------------------------*/
@@ -129,11 +130,20 @@ const uint8_t PIOS_HID_ReportDescriptor[PIOS_HID_SIZ_REPORT_DESC] =
     0x15, 0x00,            /*     LOGICAL_MINIMUM (0)        */          
     0x25, 0xff,            /*     LOGICAL_MAXIMUM (255)      */           
     0x75, 0x08,            /*     REPORT_SIZE (8)            */        
-    0x95, 0x01,            /*     REPORT_COUNT (1)           */       
-	0x81, 0x83,            /*     INPUT (Cnst,Var,Abs,Vol)   */                    
-    0x91, 0x82,            /*     OUTPUT (Data,Var,Abs,Vol)  */  
-	/* 22 */	  
-
+    0x95, PIOS_USB_HID_DATA_LENGTH+1,            /*     REPORT_COUNT (1)           */       
+	0x81, 0x83,            /*     INPUT (Const,Var,Array)          */                    
+	/* 20 */	  
+	  
+	/* Data 1 */        
+	0x85, 0x02,            /*     REPORT_ID (2)		     */
+	0x09, 0x01,            /*     USAGE (LED 1)	             */
+	0x15, 0x00,            /*     LOGICAL_MINIMUM (0)        */          
+	0x25, 0xff,            /*     LOGICAL_MAXIMUM (255)      */           
+	0x75, 0x08,            /*     REPORT_SIZE (8)            */        
+	0x95, 0x01,            /*     REPORT_COUNT (1)           */       
+	0x91, 0x82,            /*     OUTPUT (Data,Var,Abs,Vol)  */  
+	/* 34 */	  
+	  
     0xc0 	          /*     END_COLLECTION	             */
   }; /* CustomHID_ReportDescriptor */
 
diff --git a/flight/PiOS/STM32F10x/pios_usb_hid_istr.c b/flight/PiOS/STM32F10x/pios_usb_hid_istr.c
index 1b0aded03..ac8a540bc 100644
--- a/flight/PiOS/STM32F10x/pios_usb_hid_istr.c
+++ b/flight/PiOS/STM32F10x/pios_usb_hid_istr.c
@@ -32,7 +32,7 @@ __IO uint8_t bIntPackSOF = 0;  /* SOFs received between 2 consecutive packets */
 /* function pointers to non-control endpoints service routines */
 void (*pEpInt_IN[7])(void) =
   {
-	PIOS_USB_HID_TxNextByte,
+	EP1_IN_Callback, //PIOS_USB_HID_TxNextByte,
     EP2_IN_Callback,
     EP3_IN_Callback,
     EP4_IN_Callback,
diff --git a/flight/PiOS/STM32F10x/pios_usb_hid_prop.c b/flight/PiOS/STM32F10x/pios_usb_hid_prop.c
index ff67b65cc..29f7be266 100644
--- a/flight/PiOS/STM32F10x/pios_usb_hid_prop.c
+++ b/flight/PiOS/STM32F10x/pios_usb_hid_prop.c
@@ -17,9 +17,11 @@
 #include "stm32f10x.h"
 #include "usb_lib.h"
 #include "usb_conf.h"
+#include "pios.h"
 #include "pios_usb_hid_prop.h"
 #include "pios_usb_hid_desc.h"
 #include "pios_usb_hid_pwr.h"
+#include "pios_usb_hid.h"
 
 /* Private typedef -----------------------------------------------------------*/
 /* Private define ------------------------------------------------------------*/
@@ -166,8 +168,8 @@ void CustomHID_Reset(void)
   SetEPType(ENDP1, EP_INTERRUPT);
   SetEPTxAddr(ENDP1, ENDP1_TXADDR);
   SetEPRxAddr(ENDP1, ENDP1_RXADDR);
-  SetEPTxCount(ENDP1, 2);
-  SetEPRxCount(ENDP1, 2);
+  SetEPTxCount(ENDP1, PIOS_USB_HID_DATA_LENGTH+2);  /* add two for indicating report id and valid data length */
+  SetEPRxCount(ENDP1, PIOS_USB_HID_DATA_LENGTH+2);
   SetEPRxStatus(ENDP1, EP_RX_VALID);
   SetEPTxStatus(ENDP1, EP_TX_NAK);
 
@@ -335,6 +337,23 @@ uint8_t *CustomHID_GetStringDescriptor(uint16_t Length)
   {
     return NULL;
   }
+  else if (wValue0 == 3){ /* Need to get this string from hardware on the fly */
+	  uint8_t serial_number_str[40];
+	  uint8_t buffer[200];
+	  uint8_t len = 0;;
+	  if(PIOS_SYS_SerialNumberGet((char *) serial_number_str) >= 0) {
+		  for(uint8_t i = 0, len = 2; serial_number_str[i] != '\0' && len < 200; ++i) {
+			  buffer[len++] = serial_number_str[i];
+			  buffer[len++] = 0;
+		  }
+	  }
+	  else
+		  return NULL;
+	  buffer[0] = len; /* Descriptor Length */
+	  buffer[1] = USB_STRING_DESCRIPTOR_TYPE; /* Descriptor Type */
+	  ONE_DESCRIPTOR desc = {(uint8_t *) buffer, len};
+	  return Standard_GetDescriptorData(Length, &desc);		  
+  }	
   else 
   {
     return Standard_GetDescriptorData(Length, &String_Descriptor[wValue0]);
diff --git a/flight/PiOS/inc/pios_usb_hid.h b/flight/PiOS/inc/pios_usb_hid.h
index adaf7c00e..6f453f4c8 100644
--- a/flight/PiOS/inc/pios_usb_hid.h
+++ b/flight/PiOS/inc/pios_usb_hid.h
@@ -38,8 +38,7 @@
 #define PIOS_USB_HID_OFF_HID_DESC		0x12
 #define PIOS_USB_HID_SIZ_HID_DESC		0x09
 
-#define PIOS_USB_HID_DATA_LENGTH		63
-//63
+#define PIOS_USB_HID_DATA_LENGTH		62
 
 /* Global functions */
 extern int32_t PIOS_USB_HID_Init(uint32_t mode);
diff --git a/flight/PiOS/inc/pios_usb_hid_desc.h b/flight/PiOS/inc/pios_usb_hid_desc.h
index f47291b0d..a40c214a6 100644
--- a/flight/PiOS/inc/pios_usb_hid_desc.h
+++ b/flight/PiOS/inc/pios_usb_hid_desc.h
@@ -34,7 +34,7 @@
 
 #define PIOS_HID_SIZ_DEVICE_DESC               18
 #define PIOS_HID_SIZ_CONFIG_DESC               41
-#define PIOS_HID_SIZ_REPORT_DESC               24
+#define PIOS_HID_SIZ_REPORT_DESC               36
 #define PIOS_HID_SIZ_STRING_LANGID             4
 #define PIOS_HID_SIZ_STRING_VENDOR             28
 #define PIOS_HID_SIZ_STRING_PRODUCT            20
diff --git a/flight/PiOS/inc/usb_conf.h b/flight/PiOS/inc/usb_conf.h
index 5275fefa6..913060c7f 100644
--- a/flight/PiOS/inc/usb_conf.h
+++ b/flight/PiOS/inc/usb_conf.h
@@ -45,7 +45,7 @@
 /* EP1  */
 /* tx buffer base address */
 #define ENDP1_TXADDR        (0x100)
-#define ENDP1_RXADDR        (0x104)
+#define ENDP1_RXADDR        (0x124)
 
 /*-------------------------------------------------------------*/
 /* -------------------   ISTR events  -------------------------*/