#include<SD.h>
#define pin_cs 4

File fileku,root;

void setup() {
  Serial.begin(9600);
  if(!SD.begin(pin_cs))
  {
    Serial.println("Mungkin Ada Masalah Dengan Memory Card");
    while(1);
  }
  
  buat_file();
  cekIsiCard();
  

  // put your setup code here, to run once:
}


void loop() {
  int adc = analogRead(A0);
  isiFile(adc);

  delay(1000);
  bacaFile();
  delay(1000);
  // put your main code here, to run repeatedly:
}


void isiFile(int nilaiadc)
{
  fileku = SD.open("test.txt",FILE_WRITE);
  if(fileku)
  {
    fileku.println(nilaiadc);
    fileku.close();
  }
  else
  {
    Serial.println("Gagal Mengisi File");
    while(1);
  }
}

void bacaFile()
{
  fileku = SD.open("test.txt");
  if(fileku)
  {
   while(fileku.available())
   {
    Serial.write(fileku.read());
   }
   fileku.close();
  }
  else{
    Serial.println("Gagal Membaca File");
    while(1);
  }
}

void cekIsiCard()
{
  root = SD.open("/");
  while(true){

  File cekfile = root.openNextFile();
  if(!cekfile)
  {
    break;
  }
  Serial.print(cekfile.name());
  Serial.print(" ");
  Serial.println(cekfile.size());
  cekfile.close();


  }
}


void buat_file()
{
fileku = SD.open("test.txt",FILE_WRITE);
  if(fileku)
  {
    fileku.println("ini adalah isi file coba 123");
    fileku.close();
  }
  else
  {
    Serial.println("Gagal Membuat File");
    while(1);
  }
}