diff --git a/hardware/arduino/sam/cores/arduino/USB/CDC.cpp b/hardware/arduino/sam/cores/arduino/USB/CDC.cpp
index 4ceca33f6..83e70f55f 100644
--- a/hardware/arduino/sam/cores/arduino/USB/CDC.cpp
+++ b/hardware/arduino/sam/cores/arduino/USB/CDC.cpp
@@ -64,13 +64,30 @@ static const CDCDescriptor _cdcInterface =
 	D_CDCCS(CDC_CALL_MANAGEMENT,1,1),							// Device handles call management (not)
 	D_CDCCS4(CDC_ABSTRACT_CONTROL_MANAGEMENT,6),				// SET_LINE_CODING, GET_LINE_CODING, SET_CONTROL_LINE_STATE supported
 	D_CDCCS(CDC_UNION,CDC_ACM_INTERFACE,CDC_DATA_INTERFACE),	// Communication interface is master, data interface is slave 0
-	D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_ACM),USB_ENDPOINT_TYPE_INTERRUPT,0x10,0x10/*0x40*/),
+	D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_ACM),USB_ENDPOINT_TYPE_INTERRUPT,0x10, 0x10),
 
 	//	CDC data interface
 	D_INTERFACE(CDC_DATA_INTERFACE,2,CDC_DATA_INTERFACE_CLASS,0,0),
 	D_ENDPOINT(USB_ENDPOINT_OUT(CDC_ENDPOINT_OUT),USB_ENDPOINT_TYPE_BULK,512,0),
 	D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_IN ),USB_ENDPOINT_TYPE_BULK,512,0)
 };
+static const CDCDescriptor _cdcOtherInterface =
+{
+	D_IAD(0,2,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,1),
+
+	//	CDC communication interface
+	D_INTERFACE(CDC_ACM_INTERFACE,1,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,0),
+	D_CDCCS(CDC_HEADER,0x10,0x01),								// Header (1.10 bcd)
+	D_CDCCS(CDC_CALL_MANAGEMENT,1,1),							// Device handles call management (not)
+	D_CDCCS4(CDC_ABSTRACT_CONTROL_MANAGEMENT,6),				// SET_LINE_CODING, GET_LINE_CODING, SET_CONTROL_LINE_STATE supported
+	D_CDCCS(CDC_UNION,CDC_ACM_INTERFACE,CDC_DATA_INTERFACE),	// Communication interface is master, data interface is slave 0
+	D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_ACM),USB_ENDPOINT_TYPE_INTERRUPT,0x10, 0x10),
+
+	//	CDC data interface
+	D_INTERFACE(CDC_DATA_INTERFACE,2,CDC_DATA_INTERFACE_CLASS,0,0),
+	D_ENDPOINT(USB_ENDPOINT_OUT(CDC_ENDPOINT_OUT),USB_ENDPOINT_TYPE_BULK,64,0),
+	D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_IN ),USB_ENDPOINT_TYPE_BULK,64,0)
+};
 _Pragma("pack()")
 
 int WEAK CDC_GetInterface(uint8_t* interfaceNum)
@@ -79,6 +96,12 @@ int WEAK CDC_GetInterface(uint8_t* interfaceNum)
 	return USBD_SendControl(0,&_cdcInterface,sizeof(_cdcInterface));
 }
 
+int WEAK CDC_GetOtherInterface(uint8_t* interfaceNum)
+{
+	interfaceNum[0] += 2;	// uses 2
+	return USBD_SendControl(0,&_cdcOtherInterface,sizeof(_cdcOtherInterface));
+}
+
 __attribute__ ((long_call, section (".ramfunc")))
 void banzai() {
 	// Disable all interrupts
diff --git a/hardware/arduino/sam/cores/arduino/USB/USBAPI.h b/hardware/arduino/sam/cores/arduino/USB/USBAPI.h
index 7ccd1e219..8f10cff99 100644
--- a/hardware/arduino/sam/cores/arduino/USB/USBAPI.h
+++ b/hardware/arduino/sam/cores/arduino/USB/USBAPI.h
@@ -191,6 +191,7 @@ bool	MSC_Data(uint8_t rx,uint8_t tx);
 //	CSC 'Driver'
 
 int		CDC_GetInterface(uint8_t* interfaceNum);
+int		CDC_GetOtherInterface(uint8_t* interfaceNum);
 int		CDC_GetDescriptor(int i);
 bool	CDC_Setup(Setup& setup);
 
diff --git a/hardware/arduino/sam/cores/arduino/USB/USBCore.cpp b/hardware/arduino/sam/cores/arduino/USB/USBCore.cpp
index f255f19d3..d5f0f9e0c 100644
--- a/hardware/arduino/sam/cores/arduino/USB/USBCore.cpp
+++ b/hardware/arduino/sam/cores/arduino/USB/USBCore.cpp
@@ -96,6 +96,7 @@ const DeviceDescriptor USB_DeviceQualifier =
 
 volatile uint32_t _usbConfiguration = 0;
 volatile uint32_t _usbInitialized = 0;
+uint32_t _usbSetInterface = 0;
 uint32_t _cdcComposite = 0;
 
 //==================================================================
@@ -283,6 +284,24 @@ int USBD_SendInterfaces(void)
 	return interfaces;
 }
 
+int USBD_SendOtherInterfaces(void)
+{
+	int total = 0;
+	uint8_t interfaces = 0;
+
+#ifdef CDC_ENABLED
+	total = CDC_GetOtherInterface(&interfaces);
+#endif
+
+#ifdef HID_ENABLED
+	total += HID_GetInterface(&interfaces);
+#endif
+
+	total = total; // Get rid of compiler warning
+	TRACE_CORE(printf("=> USBD_SendInterfaces, total=%d interfaces=%d\r\n", total, interfaces);)
+	return interfaces;
+}
+
 //	Construct a dynamic configuration descriptor
 //	This really needs dynamic endpoint allocation etc
 //	TODO
@@ -309,6 +328,29 @@ _Pragma("pack()")
 	return true;
 }
 
+static bool USBD_SendOtherConfiguration(int maxlen)
+{
+	//	Count and measure interfaces
+	USBD_InitControl(0);
+	//TRACE_CORE(printf("=> USBD_SendConfiguration _cmark1=%d\r\n", _cmark);)
+	int interfaces = USBD_SendOtherInterfaces();
+	//TRACE_CORE(printf("=> USBD_SendConfiguration _cmark2=%d\r\n", _cmark);)
+	//TRACE_CORE(printf("=> USBD_SendConfiguration sizeof=%d\r\n", sizeof(ConfigDescriptor));)
+
+_Pragma("pack(1)")
+	ConfigDescriptor config = D_OTHERCONFIG(_cmark + sizeof(ConfigDescriptor),interfaces);
+_Pragma("pack()")
+	//TRACE_CORE(printf("=> USBD_SendConfiguration clen=%d\r\n", config.clen);)
+
+	//TRACE_CORE(printf("=> USBD_SendConfiguration maxlen=%d\r\n", maxlen);)
+
+	//	Now send them
+	USBD_InitControl(maxlen);
+	USBD_SendControl(0,&config,sizeof(ConfigDescriptor));
+	USBD_SendOtherInterfaces();
+	return true;
+}
+
 static bool USBD_SendDescriptor(Setup& setup)
 {
 	uint8_t t = setup.wValueH;
@@ -344,15 +386,12 @@ static bool USBD_SendDescriptor(Setup& setup)
 		TRACE_CORE(puts("=> USBD_SendDescriptor : USB_STRING_DESCRIPTOR_TYPE\r\n");)
 		if (setup.wValueL == 0) {
 			desc_addr = (const uint8_t*)&STRING_LANGUAGE;
-           printf("St1=%d\n\r", *desc_addr);
      }
 		else if (setup.wValueL == IPRODUCT) {
 			desc_addr = (const uint8_t*)&STRING_IPRODUCT;
-        printf("St2=%d\n\r", *desc_addr);
         }
 		else if (setup.wValueL == IMANUFACTURER) {
 			desc_addr = (const uint8_t*)&STRING_IMANUFACTURER;
-           printf("St3=%d\n\r", *desc_addr);
      }
 		else {
 			return false;
@@ -365,11 +404,14 @@ static bool USBD_SendDescriptor(Setup& setup)
 	{
 		// Device qualifier descriptor requested
 		desc_addr = (const uint8_t*)&USB_DeviceQualifier;
+        if( *desc_addr > setup.wLength ) {
+            desc_length = setup.wLength;
+        }
     }
     else if (USB_OTHER_SPEED_CONFIGURATION == t)
     {
-        // TODO
 		// Other configuration descriptor requested
+		return USBD_SendOtherConfiguration(setup.wLength);
     }
     else
     {
@@ -575,13 +617,12 @@ static void USB_ISR(void)
 			}
 			else if (GET_INTERFACE == r)
 			{
-                // TODO
 				TRACE_CORE(puts(">>> EP0 Int: GET_INTERFACE\r\n");)
-				UDD_Send8(EP0, setup.wIndex);
+				UDD_Send8(EP0, _usbSetInterface);
 			}
 			else if (SET_INTERFACE == r)
 			{
-                // TODO
+                _usbSetInterface = setup.wValueL;
 				TRACE_CORE(puts(">>> EP0 Int: SET_INTERFACE\r\n");)
 			}
 		}
diff --git a/hardware/arduino/sam/cores/arduino/USB/USBCore.h b/hardware/arduino/sam/cores/arduino/USB/USBCore.h
index 36d044a3e..b01d7576a 100644
--- a/hardware/arduino/sam/cores/arduino/USB/USBCore.h
+++ b/hardware/arduino/sam/cores/arduino/USB/USBCore.h
@@ -287,6 +287,9 @@ _Pragma("pack()")
 #define D_CONFIG(_totalLength,_interfaces) \
 	{ 9, 2, _totalLength,_interfaces, 1, 0, USB_CONFIG_SELF_POWERED, USB_CONFIG_POWER_MA(500) }
 
+#define D_OTHERCONFIG(_totalLength,_interfaces) \
+	{ 9, 7, _totalLength,_interfaces, 1, 0, USB_CONFIG_SELF_POWERED, USB_CONFIG_POWER_MA(500) }
+
 #define D_INTERFACE(_n,_numEndpoints,_class,_subClass,_protocol) \
 	{ 9, 4, _n, 0, _numEndpoints, _class,_subClass, _protocol, 0 }