New particle count 0.5 and 5.0

src/PMS/PMS5003T.cpp

@@ -158,6 +158,13 @@ int PMS5003T::getPm03ParticleCount(void) {
   return pms.getCount0_3();
 }
 
+/**
+ * @brief Read particle 0.5 count
+ *
+ * @return int particle 0.5 count index
+ */
+int PMS5003T::getPm05ParticleCount(void) { return pms.getCount0_5(); }
+
 /**
  * @brief Read particle 1.0 count
  *