#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>

#define DHT_PIN 7      // Broche de données du DHT11
#define DHT_TYPE DHT11

#define BUZZER_PIN 8    // Broche du buzzer

DHT dht(DHT_PIN, DHT_TYPE);

LiquidCrystal_I2C lcd(0x27, 4, 20);  // Adresse I2C de l'écran et dimensions (cols, rows)

void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.init();  // Utilisation de la méthode init() pour initialiser l'écran LCD
  lcd.backlight();
  pinMode(BUZZER_PIN, OUTPUT);
  digitalWrite(BUZZER_PIN, LOW);
  lcd.setCursor(0, 0);
  lcd.print("Humidity Monitor");
}

void loop() {
  float humidity = dht.readHumidity();

  if (isnan(humidity)) {
    lcd.setCursor(0, 1);
    lcd.print("Error reading DHT");
    return;
  }

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");

  if (humidity < 30 || humidity > 75) {
    lcd.setCursor(0, 2);
    lcd.print("Alert: Humidity");
    lcd.setCursor(0, 3);
    lcd.print("out of range!");
    digitalWrite(BUZZER_PIN, HIGH);
    delay(1000);
    digitalWrite(BUZZER_PIN, LOW);
  } else {
    digitalWrite(BUZZER_PIN, LOW);
    lcd.setCursor(0, 2);
    lcd.print("                  ");
    lcd.setCursor(0, 3);
    lcd.print("                  ");
  }

  delay(2000);
}