Added initial interfaces and some sensors implementing them

src/htu21d/htu21d.cpp

@@ -99,6 +99,12 @@ HTU21D::getTemperature(int bSampleData)
     return (float)m_temperature / 1000;
 }
 
+float
+HTU21D::getTemperature()
+{
+    return getTemperature(0);
+}
+
 float
 HTU21D::getHumidity(int bSampleData)
 {
@@ -108,6 +114,12 @@ HTU21D::getHumidity(int bSampleData)
     return (float)m_humidity / 1000;
 }
 
+float
+HTU21D::getHumidity()
+{
+    return getHumidity(0);
+}
+
 /*
  * Use the compensation equation from the datasheet to correct the
  * current reading

src/htu21d/htu21d.hpp

@@ -26,6 +26,8 @@
 #include <string>
 #include <mraa/i2c.hpp>
 #include <math.h>
+#include <interfaces/iHumidity.hpp>
+#include <interfaces/iTemperature.hpp>
 
 #define HTU21D_NAME "htu21d"
 #define HTU21D_I2C_ADDRESS 0x40
@@ -79,7 +81,7 @@ namespace upm {
  * @image html htu21d.jpeg
  * @snippet htu21d.cxx Interesting
  */
-class HTU21D {
+class HTU21D : virtual public iHumidity, virtual public iTemperature {
     public:
         /**
          * Instantiates an HTU21D object
@@ -102,7 +104,14 @@ class HTU21D {
          * @param bSampleData Flag to sample sensor (default false)
          * @return Relative humidity in %RH
          */
-        float getHumidity(int bSampleData = false);
+        float getHumidity(int bSampleData);
+
+        /**
+         * Gets the current measured humidity [%RH]
+         *
+         * @return Relative humidity in %RH
+         */
+        virtual float getHumidity();
 
         /**
          * Gets the humidity cell temperature [degC]
@@ -110,7 +119,14 @@ class HTU21D {
          * @param bSampleData Flag to sample sensor (default false)
          * @return Temperature in degC
          */
-        float getTemperature(int bSampleData = false);
+        float getTemperature(int bSampleData);
+
+        /**
+         * Gets the humidity cell temperature [degC]
+         *
+         * @return Temperature in degC
+         */
+        virtual float getTemperature();
 
         /**
          * Using the current humidity and temperature, the function