#include "DHTesp.h"
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

// Relay and buzzer pins
#define RELAY_PIN 5    // GPIO5 (D5)
#define BUZZER_PIN 18  // GPIO18 (D18)

// Threshold temperature
const float TEMP_THRESHOLD = 35.0;

const int DHT_PIN = 15;
DHTesp dhtSensor;
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup () {
   Serial.begin(115200);
   dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
   lcd.init();
   lcd.backlight();

   pinMode(RELAY_PIN, OUTPUT);
   pinMode(BUZZER_PIN, OUTPUT);
   digitalWrite(RELAY_PIN, LOW); // Ensure relay is off initially
   digitalWrite(BUZZER_PIN, LOW); // Ensure buzzer is off initially
}

void loop () {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 1) + " Celcius");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");

  lcd.setCursor(0, 0);
  lcd.print("Temp: " + String(data.temperature, 1) + "\xDF" + "C ");
 // lcd.setCursor(0, 1);
 // lcd.print("Humidity: " + String(data.humidity, 1) + "% ");

  // Control relay and buzzer based on temperature
  if (data.temperature > TEMP_THRESHOLD) {
    digitalWrite(RELAY_PIN, HIGH); // Turn on relay (cooling system)
    digitalWrite(BUZZER_PIN, HIGH); // Turn on buzzer (alert)
    lcd.setCursor(0, 1);
    lcd.print("Cooling ON    "); // Clear the line by adding spaces
  } else {
    digitalWrite(RELAY_PIN, LOW); // Turn off relay
    digitalWrite(BUZZER_PIN, LOW); // Turn off buzzer
    lcd.setCursor(0, 1);
    lcd.print("Cooling OFF   "); // Clear the line by adding spaces
  }

  delay(1000); // Delay outside the if-else block
}