#include "Arduino.h"
#include <LiquidCrystal.h>
#define AIR_QUAL_PIN A0
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int lect_air_qual_1 = 0;
int lect_air_qual_2 = 0;
int lect_air_qual_3 = 0;
int moy_air = 0;

void setup()
{
  lcd.begin(16,2);
  Serial.begin(9600);
  pinMode(AIR_QUAL_PIN, INPUT);
}

void qualite_air()
{
  lect_air_qual_1 = analogRead(AIR_QUAL_PIN);
  delay(500);
  lect_air_qual_2 = analogRead(AIR_QUAL_PIN);
  delay(500);
  lect_air_qual_3 = analogRead(AIR_QUAL_PIN);
  moy_air = (lect_air_qual_1 + lect_air_qual_2 + lect_air_qual_3)/3;
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Qualite Air=");
  lcd.print(moy_air);
  lcd.setCursor(0,1);
  if (moy_air <= 45)
  {
    lcd.print("Outdoor air");
  }
  else if(moy_air <= 72 && moy_air >= 46)
  {
    lcd.print("Indoor Imurity");
  }
  
  else if(moy_air >= 73 && moy_air <= 110)
  {
    lcd.print("Bad qualite");
  }
  else if(moy_air >= 111 && moy_air <= 140)
  {
    lcd.print("Very bad qualite");
  }
  else if(moy_air >= 141)
  {
    lcd.print("Move fresh air");
  }
  delay(5000);
}

void loop()
{
  qualite_air();
}