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diff --git a/peripheral/libupm/src/ppd42ns/ppd42ns.h b/peripheral/libupm/src/ppd42ns/ppd42ns.h
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--- a/peripheral/libupm/src/ppd42ns/ppd42ns.h
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@@ -1,93 +0,0 @@
-/*
- * Author: Zion Orent <sorent@ics.com>
- * Copyright (c) 2014 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 <time.h>
-#include <mraa/aio.h>
-
-namespace upm {
-
-typedef struct
-{
- int lowPulseOccupancy;
- double ratio;
- double concentration;
-} dustData;
-
- /**
- * @brief PPD42NS Dust Sensor library
- * @defgroup ppd42ns libupm-ppd42ns
- * @ingroup seeed gpio other eak
- */
- /**
- * @library ppd42ns
- * @sensor ppd42ns
- * @comname PPD42NS Dust Sensor
- * @altname Grove Dust Sensor
- * @type other
- * @man seeed
- * @web http://www.seeedstudio.com/wiki/Grove_-_Dust_Sensor
- * @con gpio
- * @kit eak
- *
- * @brief API for the PPD42NS Dust Sensor
- *
- * UPM module for the PPD42NS dust sensor
- *
- * @image html ppd42ns.jpg
- * @snippet ppd42ns.cxx Interesting
- */
- class PPD42NS {
- public:
- /**
- * PPD42NS constructor
- *
- * @param pin Digital pin to use
- */
- PPD42NS(int pin);
- /**
- * PPD42NS destructor
- */
- ~PPD42NS();
- /**
- * Prints dust concentration
- *
- * @return struct dustData Contains data from the dust sensor
- */
- dustData getData();
-
- private:
- mraa_gpio_context m_gpio;
- /**
- * Returns the amount of time it takes a pin to go from HIGH to LOW or from LOW to HIGH
- *
- * @param highLowValue int Do we measure movements from HIGH to LOW or from LOW to HIGH? highLowValue is the "from" value
- */
- double pulseIn_polyfill(bool highLowValue, double endTime);
- double m_timediff(timespec time1, timespec time2);
- };
-}
-
-