diff --git a/BTD.cpp b/BTD.cpp
index bcfba14b..1bad3099 100755
--- a/BTD.cpp
+++ b/BTD.cpp
@@ -388,7 +388,7 @@ void BTD::disconnect() {
 
 void BTD::HCI_event_task() {
         uint16_t length = BULK_MAXPKTSIZE; // Request more than 16 bytes anyway, the inTransfer routine will take care of this
-        uint8_t rcode = pUsb->inTransfer(bAddress, epInfo[ BTD_EVENT_PIPE ].epAddr, &length, hcibuf); // Input on endpoint 1
+        uint8_t rcode = pUsb->inTransfer(bAddress, epInfo[ BTD_EVENT_PIPE ].epAddr, &length, hcibuf, pollInterval); // Input on endpoint 1
 
         if(!rcode || rcode == hrNAK) { // Check for errors
                 switch(hcibuf[0]) { // Switch on event type
@@ -900,7 +900,7 @@ void BTD::HCI_task() {
 
 void BTD::ACL_event_task() {
         uint16_t length = BULK_MAXPKTSIZE;
-        uint8_t rcode = pUsb->inTransfer(bAddress, epInfo[ BTD_DATAIN_PIPE ].epAddr, &length, l2capinbuf); // Input on endpoint 2
+        uint8_t rcode = pUsb->inTransfer(bAddress, epInfo[ BTD_DATAIN_PIPE ].epAddr, &length, l2capinbuf, pollInterval); // Input on endpoint 2
 
         if(!rcode) { // Check for errors
                 if(length > 0) { // Check if any data was read
diff --git a/Usb.cpp b/Usb.cpp
index 14272588..2703c034 100644
--- a/Usb.cpp
+++ b/Usb.cpp
@@ -203,7 +203,7 @@ uint8_t USB::ctrlReq(uint8_t addr, uint8_t ep, uint8_t bmReqType, uint8_t bReque
 
 /* rcode 0 if no errors. rcode 01-0f is relayed from dispatchPkt(). Rcode f0 means RCVDAVIRQ error,
             fe USB xfer timeout */
-uint8_t USB::inTransfer(uint8_t addr, uint8_t ep, uint16_t *nbytesptr, uint8_t* data) {
+uint8_t USB::inTransfer(uint8_t addr, uint8_t ep, uint16_t *nbytesptr, uint8_t* data, uint8_t bInterval /*= 0*/) {
         EpInfo *pep = NULL;
         uint16_t nak_limit = 0;
 
@@ -215,10 +215,10 @@ uint8_t USB::inTransfer(uint8_t addr, uint8_t ep, uint16_t *nbytesptr, uint8_t*
                 USBTRACE3("(USB::InTransfer) ep requested ", ep, 0x81);
                 return rcode;
         }
-        return InTransfer(pep, nak_limit, nbytesptr, data);
+        return InTransfer(pep, nak_limit, nbytesptr, data, bInterval);
 }
 
-uint8_t USB::InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, uint8_t* data) {
+uint8_t USB::InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, uint8_t* data, uint8_t bInterval /*= 0*/) {
         uint8_t rcode = 0;
         uint8_t pktsize;
 
@@ -280,7 +280,8 @@ uint8_t USB::InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, ui
                         //printf("\r\n");
                         rcode = 0;
                         break;
-                } // if
+                } else if(bInterval > 0)
+                        delay(bInterval); // Delay according to polling interval
         } //while( 1 )
         return ( rcode);
 }
diff --git a/UsbCore.h b/UsbCore.h
index 5c6c7710..fdec87b0 100644
--- a/UsbCore.h
+++ b/UsbCore.h
@@ -245,7 +245,7 @@ public:
         /**/
         uint8_t ctrlData(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t* dataptr, bool direction);
         uint8_t ctrlStatus(uint8_t ep, bool direction, uint16_t nak_limit);
-        uint8_t inTransfer(uint8_t addr, uint8_t ep, uint16_t *nbytesptr, uint8_t* data);
+        uint8_t inTransfer(uint8_t addr, uint8_t ep, uint16_t *nbytesptr, uint8_t* data, uint8_t bInterval = 0);
         uint8_t outTransfer(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t* data);
         uint8_t dispatchPkt(uint8_t token, uint8_t ep, uint16_t nak_limit);
 
@@ -262,7 +262,7 @@ private:
         void init();
         uint8_t SetAddress(uint8_t addr, uint8_t ep, EpInfo **ppep, uint16_t *nak_limit);
         uint8_t OutTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t nbytes, uint8_t *data);
-        uint8_t InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, uint8_t *data);
+        uint8_t InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, uint8_t *data, uint8_t bInterval = 0);
         uint8_t AttemptConfig(uint8_t driver, uint8_t parent, uint8_t port, bool lowspeed);
 };