#include <LiquidCrystal_I2C.h>

#define MQ2_ANALOG A1
#define MQ2_DIGITAL 2

LiquidCrystal_I2C lcd(0x27,16,2);  

void setup() {
  // Pin initial configuration
  Serial.begin(9600);
  pinMode(MQ2_ANALOG, INPUT);
  pinMode(MQ2_DIGITAL, INPUT);

  // Inicializar el LCD
  lcd.init();
  lcd.backlight();

}

void loop() {
  // Gas Sensor interaction with Arduino Uno simulation
  Serial.print("Analog: ");
  int MQ2_ANALOG_X = analogRead(MQ2_ANALOG);
  int MQ2_scaledValue = map(MQ2_ANALOG_X, 0, 1023, 0, 100);
  Serial.println(MQ2_scaledValue);
  Serial.print("Digital: ");
  Serial.println(digitalRead(MQ2_DIGITAL));
  delay(1000);

  //Muestra el resultado
  lcd.setCursor(1, 0);
  lcd.print("Detector de gases");
  
  lcd.setCursor(1, 1);
  lcd.print("%Gas: ");
  lcd.print(MQ2_scaledValue);
  lcd.println(" PPM        ");
  delay(5);
}