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diff --git a/peripheral/libupm/src/groveultrasonic/groveultrasonic.h b/peripheral/libupm/src/groveultrasonic/groveultrasonic.h
deleted file mode 100644
index d1fd340..0000000
--- a/peripheral/libupm/src/groveultrasonic/groveultrasonic.h
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@@ -1,121 +0,0 @@
-/*
- * Author: Jun Kato <i@junkato.jp>
- * Copyright (c) 2015 Jun Kato.
- *
- * Thanks to Seeed Studio for a working arduino sketch
- *
- * 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/aio.h>
-#include <mraa/gpio.h>
-#include <sys/time.h>
-
-#define HIGH                   1
-#define LOW                    0
-
-namespace upm {
-
-/**
- * @brief Grove ultrasonic sensor library
- * @defgroup groveultrasonic libupm-groveultrasonic
- * @ingroup grove gpio sound
- */
-
-/**
- * @library groveultrasonic
- * @sensor groveultrasonic
- * @comname Grove Ultrasonic Ranger
- * @type sound
- * @man seeed
- * @con gpio
- *
- * @brief API for Grove Ultrasonic Ranger
- *
- * This Grove Ultrasonic sensor is a non-contact distance measurement module
- * which is compatible with the Grove system. It is designed for easy modular
- * project usage with industrial performance. Detection ranges from 3 cm (1.2")
- * to 4 m (13'1.5") and works best when the object is within a 30 degree angle
- * relative to the sensor.
- *
- * @image html groveultrasonic.jpg
- * @snippet groveultrasonic.cxx Interesting
- */
-class GroveUltraSonic {
-    public:
-        /**
-         * Instantiates a GroveUltraSonic object
-         *
-         * @param pin pin for triggering the sensor for distance and for receiving pulse response
-         */
-        GroveUltraSonic (uint8_t pin);
-
-        /**
-         * GroveUltraSonic object destructor.
-         */
-        ~GroveUltraSonic ();
-
-        /**
-         * Returns the echo's pulse width from the sensor in microseconds.
-         * Divide by 58 to convert distance to centimetres. 
-         * Divide by 148 to convert distance to inches.
-         */
-        int getDistance ();
-
-        /**
-         * Return name of the component
-         */
-        std::string name()
-        {
-            return m_name;
-        }
-
-        /**
-         * Returns true while the sensor is busy waiting for the echo pulse
-         */
-        bool working()
-        {
-            return m_doWork;
-        }
-
-    private:
-        bool m_doWork; /* Flag to control blocking function while waiting for falling edge interrupt */
-        mraa_gpio_context m_pinCtx;
-        uint8_t m_InterruptCounter;
-        struct timeval m_RisingTimeStamp;
-        struct timeval m_FallingTimeStamp;
-        std::string m_name;
-
-        /**
-         * ISR for the pulse signal
-         */
-        static void signalISR(void *ctx);
-
-        /**
-         * On each interrupt this function will detect if the interrupt
-         * was falling edge or rising.
-         * Should be called from the interrupt handler.
-         */
-        void ackEdgeDetected ();
-};
-
-}