diff --git a/src/collision/collision.cxx b/src/collision/collision.cxx
index 5d79f9ed..542c636d 100644
--- a/src/collision/collision.cxx
+++ b/src/collision/collision.cxx
@@ -26,13 +26,13 @@
 #include <stdexcept>
 
 #include "collision.hpp"
+#include "upm_string_parser.hpp"
 
 using namespace upm;
 
 Collision::Collision(int pin)
 {
-    
-    if ( !(m_gpio = mraa_gpio_init(pin)) ) 
+    if ( !(m_gpio = mraa_gpio_init(pin)) )
       {
         throw std::invalid_argument(std::string(__FUNCTION__) +
                                     ": mraa_gpio_init() failed, invalid pin?");
@@ -41,6 +41,20 @@ Collision::Collision(int pin)
     mraa_gpio_dir(m_gpio, MRAA_GPIO_IN);
 }
 
+Collision::Collision(std::string initStr) : mraaIo(initStr)
+{
+    mraa_io_descriptor* descs = mraaIo.getMraaDescriptors();
+    if(!descs->gpios) {
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_gpio_init() failed, invalid pin?");
+    } else {
+      if( !(m_gpio = descs->gpios[0]) ) {
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_gpio_init() failed, invalid pin?");
+      }
+    }
+}
+
 Collision::~Collision()
 {
     mraa_gpio_close(m_gpio);
diff --git a/src/collision/collision.hpp b/src/collision/collision.hpp
index 2501a9c8..7e019f44 100644
--- a/src/collision/collision.hpp
+++ b/src/collision/collision.hpp
@@ -23,6 +23,7 @@
  */
 #pragma once
 
+#include <mraa/initio.hpp>
 #include <mraa/gpio.h>
 
 namespace upm {
@@ -42,10 +43,10 @@ namespace upm {
    * @con gpio
    *
    * @brief API for the Collision Sensor
-   * 
+   *
    * The Collision Sensor can detect whether any
    * collision movement or vibration happens.
-   * It outputs a low pulse signal when vibration is detected. 
+   * It outputs a low pulse signal when vibration is detected.
    *
    * @image html collision.jpg
    * @snippet collision.cxx Interesting
@@ -58,6 +59,12 @@ namespace upm {
      * @param pin Digital pin to use
      */
     Collision(int pin);
+    /**
+     * Instantiates Collision Sensor based on a given string.
+     *
+     * @param initStr string containing specific information for  Collision Sensor.
+     */
+    Collision(std::string initStr);
     /**
      * Collision destructor
      */
@@ -69,5 +76,6 @@ namespace upm {
 
   private:
         mraa_gpio_context m_gpio;
+        mraa::MraaIo mraaIo;
 	};
 }