#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <ThingSpeak.h>

#define DHTPIN 15
#define DHTTYPE DHT22
#define LED_RED 19
#define LED_GREEN 18
#define LDR_PIN 26 // Pin sensor LDR terhubung ke D16
#define BUZZER_PIN 27 // Pin buzzer terhubung ke D17

const char *ssid = "Wokwi-GUEST";
const char *password = "";
const char *thingSpeakApiKey = "3N5PPCPVZO7THQEF";
const char *thingSpeakChannel = "2296328";

WiFiClient client;


DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

float previousTemperature = 0.0;
bool showTemperature = false;
bool lightDetected = false;

void setup() {
  pinMode(LED_RED, OUTPUT);
  pinMode(LED_GREEN, OUTPUT);
  pinMode(LDR_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  dht.begin();
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Selamat datang");
  lcd.setCursor(3, 1);
  lcd.print("---------");
  delay(5000);
  lcd.clear();
  lcd.print("Suhu: ");
  Serial.begin(115200);
  delay(1000);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  ThingSpeak.begin(client);
}

void loop() {
  delay(5000);

  int ldrValue = analogRead(LDR_PIN);

  // Tambahkan logika berdasarkan nilai LDR
  if (ldrValue < 500) {
    // Jika nilai LDR rendah (cahaya kuat), aktifkan buzzer
    digitalWrite(BUZZER_PIN, HIGH);
    tone(27, 100, 250); // Plays 262Hz tone for 0.250 seconds
    delay(500);
    tone(27, 2000, 500); // Plays 262Hz tone for 0.250 seconds
    delay(500);
    Serial.println("Cahaya terdeteksi!");
    lcd.setCursor(15,0);
    lcd.print("O");

  } else {
    // Jika nilai LDR tinggi (cahaya rendah), matikan buzzer
    digitalWrite(BUZZER_PIN, LOW);
    Serial.println("Cahaya tidak terdeteksi.");
    lcd.setCursor(15,0);
    lcd.print("X");
  }

  // Menampilkan animasi loading dengan titik-titik jika tidak ada cahaya terdeteksi
  if (!lightDetected) {
    lcd.setCursor(0, 1);
    for (int i = 0; i < 10; i++) {
      lcd.print(".");
      delay(100);
    }
    lcd.setCursor(0, 1);
    lcd.print("           ");
  }

  float temperature = dht.readTemperature();

  if (isnan(temperature)) {
    Serial.println("Gagal membaca data suhu dari sensor DHT!");
    return;
  }

  Serial.print("Suhu saat ini: ");
  Serial.print(temperature);
  Serial.println(" °C");

  if (temperature != previousTemperature) {
    previousTemperature = temperature;
    showTemperature = true;

    if (temperature > 30.0) {
      digitalWrite(LED_RED, HIGH);
      digitalWrite(LED_GREEN, LOW);
    } else {
      digitalWrite(LED_RED, LOW);
      digitalWrite(LED_GREEN, HIGH);
    }
  }

  // Menampilkan suhu pada layar LCD
  if (showTemperature) {
    lcd.setCursor(6, 0);
    lcd.print(temperature);
    lcd.print(" C");
    showTemperature = false;
  }

  unsigned long channelNumber = atol(thingSpeakChannel);
  ThingSpeak.writeField(channelNumber, 1, temperature, thingSpeakApiKey);
  ThingSpeak.writeField(channelNumber, 3, ldrValue, thingSpeakApiKey);
  

  delay(5000);

}