#include <LiquidCrystal_I2C.h>
#define MQ2_ANALOG A1
#define MQ2_DIGITAL 2

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(MQ2_ANALOG, INPUT);
  pinMode(MQ2_DIGITAL, INPUT);
  
  lcd.init();
  lcd.backlight();
}

void loop() {
  // put your main code here, to run repeatedly:
  int MQ2_ANALOG_X = analogRead(MQ2_ANALOG);
  int MQ2_scaledValue = map(MQ2_ANALOG_X, 0, 1023, 0, 100);

  lcd.setCursor(1, 0);
  lcd.print("Detector de gases");
  lcd.setCursor(1, 1);
  lcd.print("%Gas: ");
  lcd.print(String(MQ2_scaledValue));
  delay(5);
  Serial.print("Analog: ");
  Serial.println(analogRead(A2));
 
   
}