#include <SD.h>
#include "RTClib.h"

#define FILE_NAME "MyData.csv"

RTC_DS1307 rtc;

const int cs = 10; // Set the chip select pin for your SD card module
uint8_t count = 1;
float f = 0.0;
char timeStamp[32];
bool toOpen = true;

File dataFile;

void setup() {
  Serial.begin(115200);
  while (!Serial) {
    ; // Wait for serial port to connect
  }

  Serial.print("Initializing SD card...");

  if (!SD.begin(cs)) {
    Serial.println("SD card initialization failed.");
    return;
  } else {
    Serial.println("SD card initialized successfully.\nWait 36sec approx\n");
  }

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    return;
  }
}

void loop() {

  if (count < 37) {
    if (toOpen) {
      dataFile = SD.open(FILE_NAME, FILE_WRITE);
      toOpen = false;
    }
    /*
      if (dataFile) {
      Serial.println(F("File is open"));
      } else {
      Serial.print(F("SD Card: error on opening file "));
      //Serial.println(FILE_NAME);
      }
      Serial.println(F("Writing log to SD Card"));
    */
    DateTime now = rtc.now();

    sprintf(timeStamp, "%04d-%02d-%02d %02d:%02d:%02d, ", now.year(), now.month(), now.day(), now.hour(), now.minute(), now.second());
    dataFile.print(timeStamp);
    f = random(1234, 5678) / 100.0;
    dataFile.println(f);
    if (count % 6 == 0) dataFile.println("\t\t   ,\t   <--- Empty Row\n\t\t   ,\t   <--- Empty Row");
    count++;
    delay(1000); // Wait for 1 second
  }

  if (count == 37) {
    dataFile.close();
    delay(1000);
    dataFile = SD.open(FILE_NAME, FILE_READ);//Reopen in READ mode

    if (dataFile) {
      while (dataFile.available()) { // Read the data from the file
        Serial.write(dataFile.read());
      }
      dataFile.close(); // Close the file
      count = 0;
      Serial.println("STOP THE SIMULATION");
    }
  }
}