Moisture: Add C Src and Example

Changed from GroveMoisture.

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

examples/c++/grovemoisture.cxx

@@ -1,75 +0,0 @@
-/*
- * Author: Jon Trulson <jtrulson@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.
- */
-
-#include <unistd.h>
-#include <iostream>
-#include <signal.h>
-#include "grovemoisture.hpp"
-
-using namespace std;
-
-int shouldRun = true;
-
-void sig_handler(int signo)
-{
-  if (signo == SIGINT)
-    shouldRun = false;
-}
-
-
-int main ()
-{
-  signal(SIGINT, sig_handler);
-
-//! [Interesting]
-  // Instantiate a Grove Moisture sensor on analog pin A0
-  upm::GroveMoisture* moisture = new upm::GroveMoisture(0);
-  
-  // Values (approximate): 
-  // 0-300, sensor in air or dry soil
-  // 300-600, sensor in humid soil
-  // 600+, sensor in wet soil or submerged in water.
-  // Read the value every second and print the corresponding moisture level
-  while (shouldRun)
-    {
-      int val = moisture->value();
-      cout << "Moisture value: " << val << ", ";
-      if (val >= 0 && val < 300)
-        cout << "dry";
-      else if (val >= 300 && val < 600)
-        cout << "moist";
-      else
-        cout << "wet";
-
-      cout << endl;
-
-      sleep(1);
-    }
-//! [Interesting]
-
-  cout << "Exiting" << endl;
-
-  delete moisture;
-  return 0;
-}