#include <SD.h>
#include <DHT.h>
#include <RTClib.h>
#include <Wire.h>

#define DHTPIN 21   
#define DHTTYPE DHT22   
#define SD_CS 5 // Pin CS yang terhubung ke SD card pada GPIO5 pada ESP32
#define SD_MOSI 23 // Pin DI yang terhubung ke SD card pada GPIO23 pada ESP32
#define SD_MISO 19 // Pin DO yang terhubung ke SD card pada GPIO19 pada ESP32
#define SD_SCK 18 // Pin SCK yang terhubung ke SD card pada GPIO18 pada ESP32

RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Min", "Sen", "Sel", "Rab", "Kam", "Jum", "Sab"};

long seconds=00;
long minutes=00;
long hours=00;

DHT dht(DHTPIN, DHTTYPE);
File sd_file;

void setup()  {
  DateTime now = rtc.now();
  Serial.begin(9600);
  pinMode(SD_CS, OUTPUT);
  dht.begin();
  Wire.begin();

  // SD Card Initialization
  if (!SD.begin(SD_CS)) {
    Serial.println("Card failed, or not present");
    return;
  }
  Serial.println("SD card is initialized. Ready to go");

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

  sd_file = SD.open("data.txt", FILE_WRITE);

  if (sd_file)  {
    Serial.print("Hari");
    Serial.print("  ");
    Serial.print("Tgl");
    Serial.print("/");
    Serial.print("Bln");
    Serial.print("/");
    Serial.print("Thn");
    Serial.print("  ");
    Serial.print("  Waktu ");
    Serial.print("  ");
    Serial.print(" Suhu(C)");
    Serial.print("  ");
    Serial.print("Kelembaban(%)");
    Serial.println(); // Newline to end the line
    
    sd_file.print("Hari");
    sd_file.print("  ");
    sd_file.print("Tgl");
    sd_file.print("/");
    sd_file.print("Bln");
    sd_file.print("/");
    sd_file.print("Thn");
    sd_file.print("  ");
    sd_file.print("  Waktu ");
    sd_file.print("    ");
    sd_file.print(" Suhu(C)");
    sd_file.print(" ");
    sd_file.print("Kelembaban(%)"); // Newline to end the line
  }
  sd_file.close(); //closing the file
} 

void loop()  {
  DateTime now = rtc.now();
  float hum = dht.readHumidity(); // Reading the humidity
  float temp = dht.readTemperature(); // Reading the temperature

  File sd_file = SD.open("data.txt", FILE_WRITE);
  if (sd_file)  {
    senddata(now, hum, temp); // Passing the required arguments
  } else  {
    Serial.println("error opening file");
  }
  delay(3000);
}

void senddata(DateTime now, float hum, float temp){
  File sd_file = SD.open("data.txt", FILE_WRITE);
  if (!sd_file) {
    Serial.println("error opening file");
    return;
  }

  for(long seconds = 0; seconds < 60; seconds += 2)  {
    float temp = dht.readTemperature(); //Reading the temperature as Celsius and storing in temp
    float hum = dht.readHumidity();     //Reading the humidity and storing in hum
    
    sd_file.print(daysOfTheWeek[now.dayOfTheWeek()]);
    sd_file.print(",   ");
    sd_file.print(now.day(), DEC);
    sd_file.print("/");
    sd_file.print(now.month(), DEC);
    sd_file.print("/");
    sd_file.print(now.year(), DEC);
    sd_file.print("   ");
    sd_file.print(now.hour());
    sd_file.print(":");
    sd_file.print(now.minute());
    sd_file.print(":");
    sd_file.print(seconds < 10 ? "0" + String(seconds) : String(seconds));
    sd_file.print("    ");
    sd_file.print(temp);
    sd_file.print("    ");
    sd_file.println(hum); // Newline to end the line

    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(",   ");
    Serial.print(now.day(), DEC);
    Serial.print("/");
    Serial.print(now.month(), DEC);
    Serial.print("/");
    Serial.print(now.year(), DEC);
    Serial.print("   ");
    Serial.print(now.hour());
    Serial.print(":");
    Serial.print(now.minute());
    Serial.print(":");
    Serial.print(seconds < 10 ? "0" + String(seconds) : String(seconds));
    Serial.print("    ");
    Serial.print(temp);
    Serial.print("     ");
    Serial.println(hum); // Newline to end the line

    if (seconds >= 58) {
      minutes++;
    }

    if (minutes > 59) {
      hours++;
      minutes = 0;
    }

    sd_file.flush(); //saving the file

    delay(2000);
  }
  sd_file.close();   //closing the file
}