final-working-RFIDAttendanceSystem_Data-Logger_RTC_with_16x2

#include <SD.h>
#include <SPI.h>
#include <Wire.h>
#include <MFRC522.h>
#include <LiquidCrystal.h>
#include "RTClib.h"

#define SS_PIN 8
#define RST_PIN 9
#define ECHO_TO_SERIAL   1
#define WAIT_TO_START    0
#define LOG_INTERVAL  1000
#define SYNC_INTERVAL 1000


uint32_t syncTime = 0;
int buttonReading = 1;
const int chipSelect = 10;
MFRC522 mfrc522(SS_PIN, RST_PIN);
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);



String user001ID = "64 EC 6A 85";
boolean user001Status = true;


String user002ID = "66 51 06 12";
boolean user002Status = true;


RTC_DS1307 RTC;


File logfile;

void error(char *str)
{
  Serial.print("error: ");
  Serial.println(str);

  while (1);
}
///////////////////////////////////////////////////////////// Setup() Start /////////////
void setup(void)
{
  Serial.begin(9600);

  lcd.begin(16, 2);

  scanning();

  Serial.println();
  SPI.begin();      // Initiate  SPI bus
  mfrc522.PCD_Init();   // Initiate MFRC522

#if WAIT_TO_START
  Serial.println("Type any character to start");
  while (!Serial.available());
#endif //WAIT_TO_START

  // initialize the SD card
  Serial.print("Initializing SD card...");
  // make sure that the default chip select pin is set to
  // output, even if you don't use it:
  pinMode(10, OUTPUT);
  //  pinMode(buttonPin, INPUT);
  // see if the card is present and can be initialized:
  if (!SD.begin(chipSelect)) {
    error("Card failed, or not present");
  }
  Serial.println("card initialized.");

  // create a new file
  char filename[] = "LOGGER00.CSV";
  for (uint8_t i = 0; i < 100; i++) {
    filename[6] = i / 10 + '0';
    filename[7] = i % 10 + '0';
    if (! SD.exists(filename)) {
      // only open a new file if it doesn't exist
      logfile = SD.open(filename, FILE_WRITE);
      break;  // leave the loop!
    }
  }

  if (! logfile) {
    error("couldnt create file");
  }

  Serial.print("Logging to: ");
  Serial.println(filename);

  // connect to RTC
  Wire.begin();
  if (!RTC.begin()) {
    logfile.println("RTC failed");
#if ECHO_TO_SERIAL
    Serial.println("RTC failed");
#endif  //ECHO_TO_SERIAL
  }


  logfile.println("Date-Time,Status");
#if ECHO_TO_SERIAL
  Serial.println("Date-Time,Status");
#endif //ECHO_TO_SERIAL

}
///////////////////////////////////////////////////////////// Setup END /////////////

///////////////////////////////////////////////////////////// Loop() Start //////////
void loop()
{
  // Look for new cards
  if ( ! mfrc522.PICC_IsNewCardPresent())
  {
    return;
  }
  // Select one of the cards
  if ( ! mfrc522.PICC_ReadCardSerial())
  {
    return;
  }
  //Show UID on serial monitor
  String content = "";
  byte letter;
  for (byte i = 0; i < mfrc522.uid.size; i++)
  {
    Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
    Serial.print(mfrc522.uid.uidByte[i], HEX);
    content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
    content.concat(String(mfrc522.uid.uidByte[i], HEX));
  }
  Serial.println();
  content.toUpperCase();

  ///////////////////////////////////////////////////////////////////////// User #001 /start
  if (content.substring(1) == user001ID)
  {
    if (user001Status == true) {
      user001Status = false;
      user001IN();
      dateAndTime();
      logUser001IN();
      delay(3000);
      scanning();
    }
    else if (user001Status == false) {
      user001Status = true;
      user001OUT();
      dateAndTime();
      logUser001OUT();
      delay(3000);
      scanning();
    }
  }
  ///////////////////////////////////////////////////////////////////////// User #001 /end
  ///////////////////////////////////////////////////////////////////////// User #002 /start
  if (content.substring(1) == user002ID)
  {
    if (user002Status == true) {
      user002Status = false;
      Serial.println("User 002 Just Signed IN");
      delay(1000);
    }
    else if (user002Status == false) {
      user002Status = true;
      Serial.println("User 002 Just Signed OUT");
      delay(1000);
    }
  }
  ///////////////////////////////////////////////////////////////////////// User #002 /end

}
///////////////////////////////////////////////////////////// Loop() END /////////////////////








///////////////////////////////////////////////////////////////////////// User #001 Show on LCD Screen + Save data in Log file
void user001IN() {
  lcd.setCursor(0, 0);
  lcd.print("(Card Found)    ");
  lcd.setCursor(0, 1);
  lcd.print("User 001 SIGN IN");
}
void user001OUT() {
  lcd.setCursor(0, 0);
  lcd.print("(Card Found)    ");
  lcd.setCursor(0, 1);
  lcd.print("User 001 is OUT");
}
void logUser001IN() {
  logfile.print(", ");
  logfile.print("User 001 Just Signed IN");
#if ECHO_TO_SERIAL
  Serial.print(", ");
  Serial.print("User 001 Just Signed IN");
#endif //ECHO_TO_SERIAL
  logfile.println();
#if ECHO_TO_SERIAL
  Serial.println();
#endif // ECHO_TO_SERIAL
  if ((millis() - syncTime) < SYNC_INTERVAL) return;
  syncTime = millis();
  logfile.flush();
}
void logUser001OUT() {
  logfile.print(", ");
  logfile.print("User 001 Just Signed OUT");
#if ECHO_TO_SERIAL
  Serial.print(", ");
  Serial.print("User 001 Just Signed OUT");
#endif //ECHO_TO_SERIAL
  logfile.println();
#if ECHO_TO_SERIAL
  Serial.println();
#endif // ECHO_TO_SERIAL
  if ((millis() - syncTime) < SYNC_INTERVAL) return;
  syncTime = millis();
  logfile.flush();
}
///////////////////////////////////////////////////////////////////////// User #001 Show on LCD Screen + Save data in Log file /end


void scanning() {

  lcd.setCursor(0, 0);
  lcd.print("Scanning...     ");
  lcd.setCursor(0, 1);
  lcd.print("                ");

}

void dateAndTime() {

  //Serial.println("User 001 Just Signed OUT");
  DateTime now;
  // fetch the time
  now = RTC.now();
  // log time
  logfile.print('"');
  logfile.print(now.year(), DEC);
  logfile.print("/");
  logfile.print(now.month(), DEC);
  logfile.print("/");
  logfile.print(now.day(), DEC);
  logfile.print(" ");
  logfile.print(now.hour(), DEC);
  logfile.print(":");
  logfile.print(now.minute(), DEC);
  logfile.print(":");
  logfile.print(now.second(), DEC);
  logfile.print('"');
#if ECHO_TO_SERIAL
  Serial.print('"');
  Serial.print(now.year(), DEC);
  Serial.print("/");
  Serial.print(now.month(), DEC);
  Serial.print("/");
  Serial.print(now.day(), DEC);
  Serial.print(" ");
  Serial.print(now.hour(), DEC);
  Serial.print(":");
  Serial.print(now.minute(), DEC);
  Serial.print(":");
  Serial.print(now.second(), DEC);
  Serial.print('"');
#endif //ECHO_TO_SERIAL

  delay(10);
}