#include <SPI.h>
#include <SD.h>
#include <Wire.h>
#include "RTClib.h"
#define pinCS  10         // Pin 10 auf Arduino Uno

char input = "";
char theChar = "";
char CharNeu = "";

const char *inputFile  = "inputfile.txt"; //<<<<<<<<<<<<<<<<<<<<<
const char *outputFile = "outputfile.txt"; //<<<<<<<<<<<<<<<<<<<<<

File dataFile_IN;
File dataFile_OUT;
bool pleaseCarryOn = false;

RTC_DS1307 rtc;
DateTime now, last;
TimeSpan ts; 

int temperatur = 20;


void setup() {
Serial.begin(9600);

Serial.print("Initializing SD card...");
if (!SD.begin(10)) {
Serial.println("initialization failed!");
while (1);
}
Serial.println("initialization done.");

  while (!Serial);
  // init RTC
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC!");
    while (1);
  }
  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  Serial.println("RTC adjusted."); 
  last = rtc.now();
}

void loop() {

  now = rtc.now();
  ts = now - last; 
  if (ts.totalseconds() >= 6) {
    last = now;
    String zeit = ((String) (now.year()) + (now.month()) + (now.day()) + (now.hour())+ (now.minute())+(now.second()));
    String wetterdaten= (String) temperatur + "|Temperatur";
    dataFile_IN = SD.open("inputfile.txt", O_WRITE | O_APPEND);
    if (dataFile_IN) {
      Serial.println("Writing to file...");    
      dataFile_IN.println(zeit+wetterdaten);
      dataFile_IN.close(); 
      Serial.println("Done.");
    } 
    else {
      Serial.println("error opening inputfile.txt");
    }
  }
  
dataFile_IN = SD.open(inputFile);

if (dataFile_IN)
  {
    Serial.println("Here’s the original file");
    while (dataFile_IN.available())
    {
    theChar = (char)dataFile_IN.read();
    Serial.write(theChar);
    input += theChar;
    
    if(theChar=='\n'){
      
      
        if () {       
        CharNeu += input; 
        }
        else{
          
        }
        input= "";
     }
   dataFile_OUT = SD.open("outputFile.txt", FILE_WRITE|O_TRUNC);
   dataFile_OUT.println(CharNeu);//nur die werte von den 10h drin 
   dataFile_OUT.close();
   }
  }
}