#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);
#include <RTClib.h>
RTC_DS1307 rtc;
DateTime waktu;
char buffer[20],buffer2[10];
const float BETA = 3950;

#include "FS.h"
#include "SD.h"
#include "SPI.h"

String NamaFile = "/dataku.txt";
String Data;

int sekarang,tadi,tadi2;


void setup() {
  Serial.begin(115200);
   rtc.begin();
    lcd.init();
  lcd.backlight();
  lcd.home();
  lcd.print("ESP 32");
  delay(1000);
  lcd.clear();
  if(!SD.begin(5)){
    lcd.setCursor(0,3);
    lcd.print("cek nicro SD!");
    return;
  }
waktu = rtc.now();
sprintf(buffer,"%2d/%2d/%2d",waktu.day(),waktu.month(),waktu.year());
buatFile(SD, NamaFile, buffer ,"waktu,suhu");
}

void loop() {
  waktu = rtc.now();
  sekarang = waktu.second();
  sprintf(buffer,"%2d/%2d/%2d %2d:%2d:%2d",waktu.day(),waktu.month(),waktu.year(),waktu.hour(),waktu.minute(),waktu.second());
  lcd.setCursor(0,0);
  lcd.print(buffer);
  int analogValue= analogRead(36);
  float celsius = 1 / (log(1 / (4095. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  dtostrf(celsius,6,2, buffer2);
  sprintf(buffer,"Suhu : %s C ", buffer2);
  lcd.setCursor(0,1);
  lcd.print(buffer);
  if(sekarang % 5 == 0 && tadi!=sekarang)
  {
    tadi = sekarang;
  sprintf(buffer,"%2d/%2d/%2d %2d:%2d:%2d",waktu.day(),waktu.month(),waktu.year(),waktu.hour(),waktu.minute(),waktu.second());
  Data = (String)buffer + "," +celsius;
  isiFile(SD, NamaFile, Data);
  }
   if(sekarang % 10 == 0 && tadi2!=sekarang)
  {
    tadi2 = sekarang;
  bacaFile(SD, NamaFile);
  }
  delay(10);
}



void cekIsi(fs::FS &fs, const char * dirname, uint8_t levels){
  File root = fs.open(dirname);
  if(!root){
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("Gagal buka folder");
    return;
  }
  if(!root.isDirectory()){
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("Bukan folder");
    return;
  }
  File file = root.openNextFile();
  lcd.clear();
  int j=0;
  while(file){
    if(file.isDirectory()){
      Serial.print("  DIR : ");
      Serial.println(file.name());
      if(levels){
        cekIsi(fs, file.name(), levels -1);
      }
    } else {
    lcd.setCursor(0,j);
    lcd.print(file.name());
    j++;
    }
    file = root.openNextFile();
  }
}



void bacaFile(fs::FS &fs, String path){
    lcd.clear();
    lcd.setCursor(0,2);
    lcd.print("Baca file : ");
    lcd.setCursor(0,3);
    lcd.print(path);
  File file = fs.open(path);
  if(!file){
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("Gagal membaca");
    return;
  }
  while(file.available()){
    Serial.write(file.read());
  }
  file.close();
}



void buatFile(fs::FS &fs, String path, String  waktu ,String  message){
  File file = fs.open(path, FILE_WRITE);
  if(!file){
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("Gagal menulis");
    delay(2000);
    return;
  }
  if(file){
   // Serial.printf("Appending to file: %s\n", path);
    file.print("ini adalah isi ");
    file.println(path);
    file.print("Mulai direkam pada ");
    file.println(waktu);
    file.println(message);
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("OK Buat File");
    delay(2000);
  } else {
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("Gagal menulis");
  }
  file.close();
}



void isiFile(fs::FS &fs, String path, String message){
  File file = fs.open(path, FILE_APPEND);
  if(!file){
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("Gagal mengisi");
    return;
  }
  if(file.println(message)){
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("Isi tertambah");
      } else {
    lcd.clear();
    lcd.setCursor(0,3);
    lcd.print("Gagal mengisi");
  }
  file.close();
}