Updated interfaces and sensors

Signed-off-by: Serban Waltter <serban.waltter@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/dfrph/dfrph.cxx

@@ -74,3 +74,8 @@ float DFRPH::pH(unsigned int samples)
 
     return ph_avg/samples;
 }
+
+float DFRPH::getPH()
+{
+    return pH(10);
+}

src/dfrph/dfrph.hpp

@@ -132,6 +132,13 @@ namespace upm {
      */
     virtual float pH(unsigned int samples = 15);
 
+    /**
+     * Returns the detected pH value.
+     *
+     * @return The pH value detected
+     */
+    virtual float getPH();
+
   private:
     /**
      * Don't allow copies of this class