Merge pull request #229 from airgradienthq/develop

Merge to Master to Release 3.1.6

src/AirGradient.h

@@ -135,6 +135,14 @@ public:
    */
   bool isOne(void);
 
+  /**
+   * @brief Check that Airgradient object is OPEN_AIR
+   * 
+   * @return true 
+   * @return false 
+   */
+  bool isOpenAir(void);
+
   /**
    * @brief Check that Airgradient object is DIY_PRO 4.2 indoor
    *