diff --git a/src/MQUnifiedsensor.cpp b/src/MQUnifiedsensor.cpp
index d0d17e4..6ff2b8e 100644
--- a/src/MQUnifiedsensor.cpp
+++ b/src/MQUnifiedsensor.cpp
@@ -53,7 +53,7 @@ void MQUnifiedsensor::setVoltResolution(float voltaje)
 {
   _VOLT_RESOLUTION = voltaje;
 }
-void MQUnifiedsensor::inicializar()
+void MQUnifiedsensor::init()
 {
   pinMode(_pin, INPUT);
 }
diff --git a/src/MQUnifiedsensor.h b/src/MQUnifiedsensor.h
index b74b478..7fc261c 100644
--- a/src/MQUnifiedsensor.h
+++ b/src/MQUnifiedsensor.h
@@ -16,7 +16,7 @@ class MQUnifiedsensor
     MQUnifiedsensor(String Placa = "Arduino", int Voltage_Resolution =  5, int pin, String type);
     
     //Functions to set values
-    void inicializar();
+    void init();
     void update();
     void setR0(double R0 = 10);
     void setRL(double RL = 10);
@@ -37,11 +37,13 @@ class MQUnifiedsensor
   private:
     /************************Private vars************************************/
     byte _pin;
+    byte _firstFlag = false;
     String _type;
     String _placa; 
     byte _VOLT_RESOLUTION  = 5.0; // if 3.3v use 3.3
     byte _ratioInCleanAir, _sensor_volt;
     byte _RLValue = 10; //Value in KiloOhms
+    double _adc;
     float  _R0, RS_air, _ratio, _PPM, _RS_Calc;  
 };