#include <SD.h>
#define pin_cs 10

File fileku,root;

void setup() {
  Serial.begin(9600);
  if(!SD.begin(pin_cs))
  {
    Serial.println("Mungkin Ada Masalah dengan Memori Card");
    while(1);
  }
  SD.begin(pin_cs);

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

bacaFile();

root = SD.open("/");
cekIsiCard();

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

}

void loop() {
  int dht = digitalRead(13);
    isiFile(dht);
 
  delay(1000);
  bacaFile();
delay(1000);

  // put your main code here, to run repeatedly:

}


void isiFile(int nilaidht)
{
  fileku = SD.open("test.txt",FILE_WRITE);
  if(fileku)
  {
    fileku.println(nilaidht);
    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("cek memori card");
}
}

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

}
}