#define BLYNK_TEMPLATE_ID "TMPL6IPJt1j8W"
#define BLYNK_TEMPLATE_NAME "fyp baru"
#define BLYNK_AUTH_TOKEN "kNN6qCu5VWKk35pSvh0VAQ8maYm1Wo0q"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <Wire.h>
#include <RTClib.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>


const int ledPinGreen = 12; 
const int ledPinRed = 13;   
const int dhtPin = 15;      
const int ldrPin = 34;     
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1   
// Define DHT type
#define DHTTYPE DHT22

// Initialize DHT sensor
DHT dht(dhtPin, DHTTYPE);

// Initialize RTC
RTC_DS3231 rtc;

// Initialize OLED display
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// Wi-Fi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

void setup() {
  Serial.begin(115200);

  // Set LED pins as output
  pinMode(ledPinGreen, OUTPUT);
  pinMode(ledPinRed, OUTPUT);
  digitalWrite(ledPinGreen, LOW);
  digitalWrite(ledPinRed, LOW);

  // Initialize DHT sensor
  dht.begin();
  
  // Initialize RTC
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  // Set RTC to current time if it lost power
  if (rtc.lostPower()) {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  // Initialize OLED display
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  display.display();
  delay(2000);

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);

  // Connect to Wi-Fi and Blynk
  WiFi.begin(ssid, pass);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
}

void loop() {
  Blynk.run();
  
  // Read temperature and humidity from DHT sensor
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  
  // Check if any reads failed and exit early if so
  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Get current date and time from RTC
  DateTime now = rtc.now();

  // Read LDR value
  int ldrValue = analogRead(ldrPin);
  
  // Print data to Serial Monitor
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print(" %\t");
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" *C\t");
  Serial.print("Date/Time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.print("\tLDR: ");
  Serial.println(ldrValue);

  // Display data on OLED screen
  display.clearDisplay();
  display.setCursor(0, 0);
  display.print("Temp: ");
  display.print(temperature);
  display.println(" *C");

  display.print("Humidity: ");
  display.print(humidity);
  display.println(" %");

  display.print("Date: ");
  display.print(now.year(), DEC);
  display.print('/');
  display.print(now.month(), DEC);
  display.print('/');
  display.print(now.day(), DEC);
  display.println();

  display.print("Time: ");
  display.print(now.hour(), DEC);
  display.print(':');
  display.print(now.minute(), DEC);
  display.print(':');
  display.print(now.second(), DEC);
  display.println();

  display.print("LDR: ");
  display.print(ldrValue);
  display.display();

  // Control LEDs based on temperature and LDR values
  if (ldrValue > 2048) {
    if (temperature >= 27 && temperature <= 32) {
      digitalWrite(ledPinGreen, HIGH);
      digitalWrite(ledPinRed, LOW);
    } else if (temperature > 32) {
      digitalWrite(ledPinRed, HIGH);
      digitalWrite(ledPinGreen, LOW);
    } else {
      digitalWrite(ledPinGreen, LOW);
      digitalWrite(ledPinRed, LOW);
    }
  } else {
    digitalWrite(ledPinRed, HIGH);
    digitalWrite(ledPinGreen, LOW);
  }

  // Send data to Blynk
  Blynk.virtualWrite(V0, temperature);
  Blynk.virtualWrite(V1, humidity);
  Blynk.virtualWrite(V2, ldrValue);
  Blynk.virtualWrite(V3, digitalRead(ledPinGreen));
  Blynk.virtualWrite(V4, digitalRead(ledPinRed));
}