#include <WiFi.h>
#include <FirebaseESP32.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>

#define FIREBASE_HOST "AIzaSyBU8jotNn0hcjpNvT6mV_v0VFAt7k1A3xk"
#define FIREBASE_AUTH "https://final-ea18c-default-rtdb.firebaseio.com/"

#define SSID "Wokwi-GUEST"
#define PASSWORD "  "

#define DHTPIN 15
#define DHTTYPE DHT22
#define LED_XANH_PIN 2
#define LED_DO_PIN 4
#define PIR_PIN 15
#define SERVO_PIN 18

FirebaseData firebaseData;
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 20, 4);
Servo myServo;

void setup() {
  Serial.begin(115200);
  WiFi.begin(SSID, PASSWORD);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected to WiFi");

  Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
  Firebase.reconnectWiFi(true);

  dht.begin();
  lcd.begin(20, 4); // Khởi tạo LCD với 16 cột và 2 dòng
  lcd.backlight();

  pinMode(LED_XANH_PIN, OUTPUT);
  pinMode(LED_DO_PIN, OUTPUT);
  pinMode(PIR_PIN, INPUT);

  myServo.attach(SERVO_PIN);
}

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

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print(" %\t");
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" *C");

  if (temperature < 10) {
    digitalWrite(LED_XANH_PIN, HIGH);
    delay(500);
    digitalWrite(LED_XANH_PIN, LOW);
    delay(500);
  } else if (temperature > 50) {
    digitalWrite(LED_DO_PIN, HIGH);
    delay(500);
    digitalWrite(LED_DO_PIN, LOW);
    delay(500);
  }

  if (digitalRead(PIR_PIN) == HIGH) {
    myServo.write(90);
    delay(1000);
    myServo.write(0);
  }

  if (Firebase.setFloat(firebaseData, "/temperature", temperature)) {
    Serial.println("Temperature data sent to Firebase");
  } else {
    Serial.println("Failed to send temperature data");
  }

  if (Firebase.setFloat(firebaseData, "/humidity", humidity)) {
    Serial.println("Humidity data sent to Firebase");
  } else {
    Serial.println("Failed to send humidity data");
  }

  delay(2000); // Delay giữa các lần đọc cảm biến
}