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diff --git a/libraries/HID/src/HID.h b/libraries/HID/src/HID.h
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+++ b/libraries/HID/src/HID.h
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+/*
+  Copyright (c) 2015, Arduino LLC
+  Original code (pre-library): Copyright (c) 2011, Peter Barrett
+
+  Permission to use, copy, modify, and/or distribute this software for
+  any purpose with or without fee is hereby granted, provided that the
+  above copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+  WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+  WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR
+  BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
+  OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+  WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+  ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+  SOFTWARE.
+ */
+
+#ifndef HID_h
+#define HID_h
+
+#include <stdint.h>
+#include <Arduino.h>
+#include "PluggableUSB.h"
+
+#if defined(USBCON)
+
+#define _USING_HID
+
+// HID 'Driver'
+// ------------
+#define HID_GET_REPORT        0x01
+#define HID_GET_IDLE          0x02
+#define HID_GET_PROTOCOL      0x03
+#define HID_SET_REPORT        0x09
+#define HID_SET_IDLE          0x0A
+#define HID_SET_PROTOCOL      0x0B
+
+#define HID_HID_DESCRIPTOR_TYPE         0x21
+#define HID_REPORT_DESCRIPTOR_TYPE      0x22
+#define HID_PHYSICAL_DESCRIPTOR_TYPE    0x23
+
+// HID subclass HID1.11 Page 8 4.2 Subclass
+#define HID_SUBCLASS_NONE 0
+#define HID_SUBCLASS_BOOT_INTERFACE 1
+
+// HID Keyboard/Mouse bios compatible protocols HID1.11 Page 9 4.3 Protocols
+#define HID_PROTOCOL_NONE 0
+#define HID_PROTOCOL_KEYBOARD 1
+#define HID_PROTOCOL_MOUSE 2
+
+// Normal or bios protocol (Keyboard/Mouse) HID1.11 Page 54 7.2.5 Get_Protocol Request
+// "protocol" variable is used for this purpose.
+#define HID_BOOT_PROTOCOL	0
+#define HID_REPORT_PROTOCOL	1
+
+// HID Request Type HID1.11 Page 51 7.2.1 Get_Report Request
+#define HID_REPORT_TYPE_INPUT   1
+#define HID_REPORT_TYPE_OUTPUT  2
+#define HID_REPORT_TYPE_FEATURE 3
+
+typedef struct
+{
+  uint8_t len;      // 9
+  uint8_t dtype;    // 0x21
+  uint8_t addr;
+  uint8_t versionL; // 0x101
+  uint8_t versionH; // 0x101
+  uint8_t country;
+  uint8_t desctype; // 0x22 report
+  uint8_t descLenL;
+  uint8_t descLenH;
+} HIDDescDescriptor;
+
+typedef struct 
+{
+  InterfaceDescriptor hid;
+  HIDDescDescriptor   desc;
+  EndpointDescriptor  in;
+} HIDDescriptor;
+
+class HIDSubDescriptor {
+public:
+  HIDSubDescriptor *next = NULL;
+  HIDSubDescriptor(const void *d, const uint16_t l) : data(d), length(l) { }
+
+  const void* data;
+  const uint16_t length;
+};
+
+class HID_ : public PluggableUSBModule
+{
+public:
+  HID_(void);
+  int begin(void);
+  int SendReport(uint8_t id, const void* data, int len);
+  void AppendDescriptor(HIDSubDescriptor* node);
+
+protected:
+  // Implementation of the PluggableUSBModule
+  int getInterface(uint8_t* interfaceCount);
+  int getDescriptor(USBSetup& setup);
+  bool setup(USBSetup& setup);
+  uint8_t getShortName(char* name);
+
+private:
+  uint8_t epType[1];
+
+  HIDSubDescriptor* rootNode;
+  uint16_t descriptorSize;
+
+  uint8_t protocol;
+  uint8_t idle;
+};
+
+// Replacement for global singleton.
+// This function prevents static-initialization-order-fiasco
+// https://isocpp.org/wiki/faq/ctors#static-init-order-on-first-use
+HID_& HID();
+
+#define D_HIDREPORT(length) { 9, 0x21, 0x01, 0x01, 0, 1, 0x22, lowByte(length), highByte(length) }
+
+#endif // USBCON
+
+#endif // HID_h