root: init sensors: humidity+temp, CO2. Pressure sensor is now static class

StateHandler/inc/StateHandler.h

@@ -21,6 +21,8 @@
 #include "LiquidCrystal.h"
 #include "ModbusMaster.h"
 #include "ModbusRegister.h"
+#include "GMP252.h"
+#include "HMP60.h"
 
 /** Buttons enumeration
  *
@@ -118,6 +120,12 @@ private:
   LiquidCrystal *_lcd;
   ModbusRegister *A01;
 
+  /* CO2 sensor object */
+  GMP252 co2;
+
+  /* Humidity and temperature sensor object */
+  HMP60 humidity;
+
   /** Initialization state
    *
    * @param event event of the state