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diff --git a/arduino/cores/nRF5/RingBuffer.h b/arduino/cores/nRF5/RingBuffer.h
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+++ b/arduino/cores/nRF5/RingBuffer.h
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+/*
+  Copyright (c) 2014 Arduino.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef _RING_BUFFER_
+#define _RING_BUFFER_
+
+#include <stdint.h>
+
+// Define constants and variables for buffering incoming serial data.  We're
+// using a ring buffer (I think), in which head is the index of the location
+// to which to write the next incoming character and tail is the index of the
+// location from which to read.
+#define SERIAL_BUFFER_SIZE 64
+
+class RingBuffer
+{
+  public:
+    uint8_t _aucBuffer[SERIAL_BUFFER_SIZE] ;
+    int _iHead ;
+    int _iTail ;
+
+  public:
+    RingBuffer( void ) ;
+    void store_char( uint8_t c ) ;
+	void clear();
+	int read_char();
+	int available();
+	int peek();
+	bool isFull();
+
+  private:
+	int nextIndex(int index);
+} ;
+
+#endif /* _RING_BUFFER_ */