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diff --git a/peripheral/libupm/src/nunchuck/nunchuck.h b/peripheral/libupm/src/nunchuck/nunchuck.h
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+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#pragma once
+
+#include <string>
+#include <mraa/i2c.h>
+
+#define NUNCHUCK_I2C_ADDR    0x52
+
+namespace upm {
+
+  /**
+   * @brief Wii Nunchuk library
+   * @defgroup nunchuck libupm-nunchuck
+   * @ingroup generic i2c accelerometer robok
+   */
+  /**
+   * @library nunchuck
+   * @sensor nunchuck
+   * @comname Wii Nunchuk
+   * @type accelerometer
+   * @man generic
+   * @web http://wiibrew.org/wiki/Wiimote/Extension_Controllers
+   * @con i2c
+   * @kit robok
+   *
+   * @brief API for the Wii* Nunchuk controller
+   *
+   * UPM module for the Wii Nunchuk controller. This module was tested with
+   * Wii Nunchuk connected to I2C via a Grove Wii Nunchuk adapter.
+   *
+   * See http://wiibrew.org/wiki/Wiimote/Extension_Controllers and
+   * http://wiibrew.org/wiki/Wiimote/Extension_Controllers/Nunchuck
+   * for more details on the controller and its protocol.
+   *
+   * A warning for the Grove Wii Nunchuk adapter: it has 2 traces on one
+   * side, and 3 traces on the other.  Do not match these up with the
+   * Nunchuk connector's traces. The connector's 'Grove'
+   * should be on the same side as the Grove interface socket on the
+   * adapter.
+   *
+   * @image html nunchuck.jpg
+   * @snippet nunchuck.cxx Interesting
+   */
+  class NUNCHUCK {
+  public:
+    /**
+     * NUNCHUCK constructor
+     *
+     * @param bus I2C bus to use
+     * @param addr I2C address to use
+     */
+    NUNCHUCK(int bus, uint8_t addr=NUNCHUCK_I2C_ADDR);
+
+    /**
+     * NUNCHUCK destructor
+     */
+    ~NUNCHUCK();
+
+    /**
+     * Writes value(s) into registers
+     *
+     * @param reg Register location to start writing into
+     * @param byte Byte to write
+     * @return True if successful
+     */
+    bool writeByte(uint8_t reg, uint8_t byte);
+
+    /**
+     * Reads value(s) from registers
+     *
+     * @param reg Register location to start reading from
+     * @param buffer Buffer for data storage
+     * @param len Number of bytes to read
+     * @return Number of bytes read
+     */
+    int readBytes(uint8_t reg, uint8_t *buffer, int len);
+
+    /**
+     * Initializes the controller. Here, we disable encryption after
+     * delaying for a time to ensure the controller is ready.
+     *
+     * @return True if initialization is successful
+     */
+    bool init();
+
+    /**
+     * Reads and updates the current state of the controller.
+     *
+     */
+    void update();
+
+    /**
+     * Current analog stick X position
+     *
+     */
+    int stickX;
+
+    /**
+     * Current analog stick Y position
+     *
+     */
+    int stickY;
+
+    /**
+     * Current accelerometer X value
+     *
+     */
+    int accelX;
+
+    /**
+     * Current accelerometer Y value
+     *
+     */
+    int accelY;
+
+    /**
+     * Current accelerometer Z value
+     *
+     */
+    int accelZ;
+
+    /**
+     * Button C pressed?
+     *
+     */
+    bool buttonC;
+
+    /**
+     * Button Z pressed?
+     *
+     */
+    bool buttonZ;
+
+  private:
+    mraa_i2c_context m_i2c;
+  };
+}
+
+