datalogger

#include <SPI.h>
#include <SD.h>
#include <Wire.h>
#include <DS3231.h>
File root, oke;
DS3231 RTC;

const int chipSelect = 10;
int detik=0;
int menit=0;
int jam=0;
boolean dataLengkap=false;
String dataString="";
String dataTgl="";
String dataku="";
boolean katalengkap=false;
boolean ambilFile=false;
int mode=4;//default

void setup(){
  Wire.begin();
  RTC.begin();
  Serial.begin(9600);
  pinMode(10, OUTPUT);
  if (!SD.begin(10))return;
}

void loop(){
     DateTime now = RTC.now();
   dataString="";
   dataString=String(now.date())+'/';
   dataString+=String(now.month())+'/';
   dataString+=String(now.year())+',';
   dataString+=String(now.hour())+':';
   dataString+=String(now.minute())+':';
   dataString+=String(now.second())+',';

   dataTgl="";
   dataTgl='z'+String(now.date());
   dataTgl+=String(now.month());
   dataTgl+=String(now.year())+".txt";
//   dataTgl='z'+String(now.minute())+".txt";

if(mode==1){
  if(now.second()==0 && menit!=now.minute()){
        simpan();
        menit=now.minute();}}
if(mode==2){
      if(now.minute()%5==0 && detik!=now.second() && menit!=now.minute()){
        simpan();
        detik=now.second();
        menit=now.minute();}}
if(mode==3){
      if(now.minute()%10==0 && detik!=now.second() && menit!=now.minute()){
        simpan();
        detik=now.second();
        menit=now.minute();}}
if(mode==4){
      if(now.minute()%15==0 && detik!=now.second() && menit!=now.minute()){
        simpan();
        detik=now.second();
        menit=now.minute();}}
if(mode==5){
      if(now.minute()%20==0 && detik!=now.second() && menit!=now.minute()){
        simpan();
        detik=now.second();
        menit=now.minute();}}
if(mode==6){
      if(now.minute()%30==0 && detik!=now.second() && menit!=now.minute()){
        simpan();
        detik=now.second();
        menit=now.minute();}}
if(mode==7){
      if(now.second()==0 && now.minute()==0 && jam!=now.hour()){
        simpan();
        jam=now.hour();}}

if(katalengkap){
    if(dataku[0]=='j') {
      dataku=dataku.substring(1);
      char namafileku[dataku.length()];
      dataku.toCharArray(namafileku,sizeof(namafileku));
      SD.remove(namafileku);}
    else{
      char namafileku[dataku.length()];
      dataku.toCharArray(namafileku,sizeof(namafileku));
      File dataFile = SD.open(namafileku);
      if (dataFile) {
      while(dataFile.available()){
      Serial.write(dataFile.read());}
      dataFile.close();}}
    dataku="";
    katalengkap=false;}

if(ambilFile){
  root = SD.open("/");
  printDirectory(root);
  ambilFile=false;}
}

void printDirectory(File sip) {
  sip.rewindDirectory();
   while(true) {
     File masuk = sip.openNextFile();
     if (!masuk) {
       break;}
       Serial.println(masuk.name());
      File dataFile = SD.open(masuk.name());
      if (dataFile) {
      while(dataFile.available()){
      Serial.write(dataFile.read());}
      dataFile.close();}
      Serial.println('x');
      SD.remove(masuk.name());
     masuk.close();}
}

void serialEvent(){
  while(Serial.available()){
    char ambil=(char)Serial.read();
    if(ambil=='a') mode=1;
    if(ambil=='b') mode=2;
    if(ambil=='c') mode=3;
    if(ambil=='d') mode=4;
    if(ambil=='e') mode=5;
    if(ambil=='f') mode=6;
    if(ambil=='g') mode=7;
    if(ambil=='h') ambilFile=true;
    else dataku+=ambil;
   if(ambil=='\n') katalengkap=true;
 }}

void simpan(){
  for (int analogPin = 0; analogPin < 3; analogPin++) {
    int sensor = analogRead(analogPin);
    dataString += String(sensor);
    if (analogPin < 2) dataString += ',';}
  char namafileku[dataTgl.length()+1];
  dataTgl.toCharArray(namafileku,sizeof(namafileku));
  File dataFile = SD.open(namafileku,FILE_WRITE);
  if (dataFile) {
      dataFile.print('w');
      dataFile.println(dataString);
      dataFile.close();
      Serial.println(dataString);}}