#include <SD.h> 
#define pin_cs 10

File fileku, root;

void setup() {
  Serial.begin(115200);
  if(!SD.begin(pin_cs))
  {
    Serial.println("Mungkin Ada Masalah dengan Memori Card");
    while(1);
  }

  buatFile();
  checkIsiCard();
 
}


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

  isiFile(adc);
  delay(1000);
  bacaFile();
  delay(1000);


}


void isiFile(int nilaiadc){
  fileku = SD.open ("test.txt", FILE_WRITE);
    if (fileku){
    fileku.println(String("Resistansi NTC = ")+(nilaiadc)+String(" Ohm"));
    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 checkIsiCard(){
  root = SD.open("/");
  while (true){
  File cekfile = root.openNextFile();
  if(!cekfile){
    break;
  }
  Serial.print(cekfile.name() + String(" = "));
  Serial.println(cekfile.size());
  cekfile.close();
  }
}

void buatFile(){  
  fileku = SD.open("test.txt",FILE_WRITE); // maksimal 8 character
   if(fileku){
    fileku.println("Ini adalah isi filenya");
    fileku.close();
  } else{
    Serial.println("Gagal membuat File");
    while(1);
  }
}