#include

#include //library for rfid sensor

#include //library for rtc module

#include //library for sd card module

#include

#include //library for i2c module

#include //library for servo moter

//define pins for rfid sensor

#define SS_PIN 10

#define RST_PIN 9

//define select pin for SD card module

#define CS_SD 4

Servo myservo; // create servo object to control a servo.

MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.

RTC_DS3231 rtc;// Instance of the class for RTC

LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7,3,POSITIVE);//instance for lcd display

const int numOfCards = 5;//the number of cards used. this can change as you want

byte cards[numOfCards][4] = {{0x69, 0x38, 0xFD, 0x6E},{0x29, 0xCE, 0xE2, 0x6E},{0xD9, 0x45, 0xE5, 0x6E},{0xA9, 0x76, 0x47, 0xB8},{0x59, 0x3F, 0x16, 0x98}}; // array of UIDs of rfid cards

int n = 0;//n is for the total number of students//j is for to detect the card is valid or not

int numCard[numOfCards]; //this array content the details of cards that already detect or not .

String names[numOfCards] = {"Janith Hasitha","Nirosh Bandara","Manoj Akalanka","Milan Sankalpa","Chamila Bandara"};//student names

long sNumbers[numOfCards] = {16242,16273,16389,16322,16323};//student sNumbers

void setup() {

Serial.begin(9600); // Initialize serial communications with the PC

SPI.begin(); // Init SPI bus

mfrc522.PCD_Init(); // Init MFRC522 card

//setup for lcd screen

lcd.begin(20,4);// initialize the lcd

myservo.attach(6); // attaches the servo on pin 9 to the servo object

//setup for RTC module

#ifndef ESP8266

while (!Serial); // for Leonardo/Micro/Zero

#endif

if (! rtc.begin()) {

Serial.println(F("Couldn't find RTC"));

while (1);

}

else{

rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));//time will set auto when it compiles

//rtc.adjust(DateTime(2020, 1, 9, 16, 59, 45));// manually set time

}

if (rtc.lostPower()) {

Serial.println(F("RTC lost power, lets set the time!"));

}

//setup for display option (serial monitor)

Serial.println(F("\t\t\t<<<< Library Attendance >>>>\n")); // introduction

Serial.println(F("COUNT\tRegNO\tNAME\t\tDATE\t\tARRIVAL\t\tDEPARTURE"));// make four columns

//setup sd card

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

digitalWrite(CS_SD,LOW);

// if (!SD.begin(4)) {//checks the sd card inserted and if it not the program will not working.

// Serial.println(F("initialization failed!"));

// while (1);

// }

// Serial.println(F("initialization done."));

File myFile = SD.open("test.txt", FILE_WRITE);

if (myFile) {

myFile.print(F(" \t**** Library Attendance ****\n"));

myFile.println(F("COUNT\tRegNO\tNAME\t\tDATE\t\tARRIVAL\t\tDEPARTURE"));

// close the file:

myFile.close();

Serial.println(F("done."));

} else {

// Serial.println(F("error opening test.txt"));

}

myFile = SD.open("test.txt");

if (myFile) {

Serial.println(F("test.txt:"));

while (myFile.available()) {

Serial.write(myFile.read());

}

myFile.close();

} else {

// Serial.println(F("error opening test.txt"));

}

digitalWrite(CS_SD,HIGH);

}

void readRFID(){

int j = -1;

byte card_ID[4];//card UID size 4byte

if ( ! mfrc522.PICC_IsNewCardPresent()) {//look for new card

return;//got to start of loop if there is no card present

}

if ( ! mfrc522.PICC_ReadCardSerial()) {// Select one of the cards

return;//if read card serial(0) returns 1, the uid struct contians the ID of the read card.

}

for (byte i = 0; i < mfrc522.uid.size; i++) {

card_ID[i] = mfrc522.uid.uidByte[i];

}

for (int i = 0; i < numOfCards; i++) {

if (card_ID[0] == cards[i][0] && card_ID[1] == cards[i][1] && card_ID[2] == cards[i][2] && card_ID[3] == cards[i][3]) {

j = i;

}

}

if(j == -1) {//check the card validity

invalid();

}

else if (numCard[j] == 1) { //to check if the card already detect

alreadyRead(names[j], sNumbers[j], j);

}

else {

//send data to display and save

logCardData(names[j], sNumbers[j], j);

}

delay(1000);

}

void servo(){//method for servo motor

int pos = 0; // variable to store the servo position

for (pos = 90; pos >= 0; pos -= 1) { // goes from 0 degrees to 90 degrees

// in steps of 1 degree

myservo.write(pos);

delay(5);

}

delay(5000);

for (pos = 0; pos <= 90; pos += 1) {// goes from 90 degrees to 0 degrees

myservo.write(pos);

delay(5);

}

}

void logCardData(String name, long sNumber, int j){

displayAllow(name,sNumber);

DateTime now = rtc.now();

numCard[j] = 1;//put 1 in the numCard array : numCard[j]={1,1} to let the arduino know if the card was detecting

n++;//to get the count

//display details to the console (serial monitor)

Serial.print(n);//print number

Serial.print(F("\t"));

Serial.print(sNumber); //print name of student

Serial.print(F("\t"));

Serial.print(name); //print name of student

Serial.print(F("\t"));

Serial.print(now.year(),DEC); //print year

Serial.print(F("-"));

if(now.month()<10){Serial.print("0");Serial.print(now.month(),DEC);}

else Serial.print(now.month(),DEC); //print month

Serial.print(F("-"));

if(now.day()<10){Serial.print("0");Serial.print(now.day(),DEC);} //if the day is one digit this will display it with zero in front as two digits.

else Serial.print(now.day(),DEC);

Serial.print(F("\t"));

if(now.hour()<10){Serial.print("0");Serial.print(now.hour(),DEC);}

else Serial.print(now.hour(),DEC);

Serial.print(F(":"));

if(now.minute()<10){Serial.print("0");Serial.print(now.minute(),DEC);}

else Serial.print(now.minute(),DEC);

Serial.print(F(":"));

if(now.second()<10){Serial.print("0");Serial.print(now.second(),DEC);}

else Serial.print(now.second(),DEC);

Serial.print(F("\t"));

Serial.println(F("--:--:-- "));

digitalWrite(CS_SD,LOW);

File myFile = SD.open("test.txt", FILE_WRITE);//record the data to the sd card

if (myFile) {

myFile.print(n);//print number

myFile.print(F("\t"));

myFile.print(sNumber); //print name of student

myFile.print(F("\t"));

myFile.print(name); //print name of student

myFile.print(F("\t"));

myFile.print(now.year(),DEC); //print year

myFile.print(F("-"));

if(now.month()<10){myFile.print("0");myFile.print(now.month(),DEC);}

else myFile.print(now.month(),DEC); //print month

myFile.print(F("-"));

if(now.day()<10){myFile.print("0");myFile.print(now.day(),DEC);}

else myFile.print(now.day(),DEC);

myFile.print(F("\t"));

if(now.hour()<10){myFile.print("0");myFile.print(now.hour(),DEC);}

else myFile.print(now.hour(),DEC);

myFile.print(F(":"));

if(now.minute()<10){myFile.print("0");myFile.print(now.minute(),DEC);}

else myFile.print(now.minute(),DEC);

myFile.print(F(":"));

if(now.second()<10){myFile.print("0");myFile.print(now.second(),DEC);}

else myFile.print(now.second(),DEC);

myFile.print(F("\t"));

myFile.println(F("--:--:--"));

myFile.close();

Serial.println(F("done."));

} else {

// Serial.println(F("error opening test.txt"));

}

digitalWrite(CS_SD,HIGH);

}

void invalid(){

Serial.println(F("Invalid Card."));

digitalWrite(CS_SD,LOW);

File myFile = SD.open("test.txt", FILE_WRITE);

if (myFile) {

myFile.println(F("Invalid Card."));

myFile.close();

Serial.println(F("done."));

} else {

// Serial.println(F("error opening test.txt"));

}

digitalWrite(CS_SD,LOW);

lcd.home ();

lcd.clear();

lcd.setCursor (6, 0 );// go home

lcd.print(F("Warning!"));

lcd.setCursor (4, 2 );

lcd.print(F("Invalid Card!"));

lcd.setCursor (3, 3 );

lcd.print(F("Access Denied!"));

delay(3000);

lcd.clear();

}

void alreadyRead(String name, long sNumber, int j){

DateTime now = rtc.now();

numCard[j] = 0;//put 1 in the numCard array : numCard[j]={1,1} to let the arduino know if the card was detecting

n--;//to get the count

//display details to the console (serial monitor)

Serial.print(n);//print number

Serial.print(F("\t"));

Serial.print(sNumber); //print name of student

Serial.print(F("\t"));

Serial.print(name); //print name of student

Serial.print(F("\t"));

Serial.print(now.year(),DEC); //print year

Serial.print(F("-"));

if(now.month()<10){Serial.print("0");Serial.print(now.month(),DEC);}

else Serial.print(now.month(),DEC); //print month

Serial.print(F("-"));

if(now.day()<10){Serial.print("0");Serial.print(now.day(),DEC);}

else Serial.print(now.day(),DEC);

Serial.print(F("\t"));

Serial.print(F("--:--:--"));

Serial.print(F("\t"));

if(now.hour()<10){Serial.print("0");Serial.print(now.hour(),DEC);}

else Serial.print(now.hour(),DEC);

Serial.print(F(":"));

if(now.minute()<10){Serial.print("0");Serial.print(now.minute(),DEC);}

else Serial.print(now.minute(),DEC);

Serial.print(F(":"));

if(now.second()<10){Serial.print("0");Serial.println(now.second(),DEC);}

else Serial.print(now.second(),DEC);

Serial.println(" ");

digitalWrite(CS_SD,LOW);

File myFile = SD.open("test.txt", FILE_WRITE);

if (myFile) {

myFile.print(n);//print number

myFile.print(F("\t"));

myFile.print(sNumber); //print name of student

myFile.print(F("\t"));

myFile.print(name); //print name of student

myFile.print(F("\t"));

myFile.print(now.year(),DEC); //print year

myFile.print(F("-"));

if(now.month()<10){myFile.print("0");myFile.print(now.month(),DEC);}

else myFile.print(now.month(),DEC); //print month

myFile.print(F("-"));

if(now.day()<10){myFile.print("0");myFile.print(now.day(),DEC);}

else myFile.print(now.day(),DEC);

myFile.print(F("\t"));

myFile.print(F("--:--:--"));

myFile.print(F("\t"));

if(now.hour()<10){myFile.print("0");myFile.print(now.hour(),DEC);}

else myFile.print(now.hour(),DEC);

myFile.print(F(":"));

if(now.minute()<10){myFile.print("0");myFile.print(now.minute(),DEC);}

else myFile.print(now.minute(),DEC);

myFile.print(F(":"));

if(now.second()<10){myFile.print("0");myFile.print(now.second(),DEC);}

else myFile.println(now.second(),DEC);

myFile.close();

Serial.println(F("done."));

} else {

// Serial.println(F("error opening test.txt"));

}

digitalWrite(CS_SD,HIGH);

lcd.home ();

lcd.clear();

lcd.setCursor (5, 1 );// go home

lcd.print(F("Thank You"));

lcd.setCursor (4, 2 );

lcd.print(F("Come Again!"));

delay(3000);

servo();

lcd.clear();

}

void printLoopLCD(){//method for display date and time and number of students attendance to the lcd dislpay

DateTime now = rtc.now();

lcd.home ();// go home

lcd.setCursor (1, 0);

lcd.print(F("Welcome to Library"));

lcd.setCursor (0, 1 );

lcd.print(now.year(),DEC); //print year+

lcd.print(F("-"));

if(now.month()<10){lcd.print("0");lcd.print(now.month(),DEC);}

else lcd.print(now.month(),DEC); //print month

lcd.print(F("-"));

if(now.day()<10){lcd.print("0");lcd.print(now.day(),DEC);}

else lcd.print(now.day(),DEC);

//lcd.print(now.day(),DEC); //print date

lcd.setCursor (12, 1 );

if(now.hour()<10){lcd.print("0");lcd.print(now.hour(),DEC);}

else lcd.print(now.hour(),DEC);

//lcd.print(now.hour(),DEC);

lcd.print(F(":"));

if(now.minute()<10){lcd.print("0");lcd.print(now.minute(),DEC);}

else lcd.print(now.minute(),DEC);

//lcd.print(now.minute(),DEC);

lcd.print(F(":"));

if(now.second()<10){lcd.print("0");lcd.print(now.second(),DEC);}

else lcd.print(now.second(),DEC);

//lcd.print(now.second(),DEC);

lcd.setCursor (0, 3 );

lcd.print(F("No of Students:"));

lcd.setCursor (16, 3 );

lcd.print(n);

delay(1000);

}

void displayAllow(String name,long sNumber){

lcd.home ();

lcd.clear();

lcd.setCursor (6, 0 );

lcd.print(F("Welcome!"));

lcd.setCursor (1, 1 );

lcd.print(F("Authorized Access!"));

lcd.setCursor (0, 2 );

lcd.print(F("Name:"));

lcd.setCursor (5, 2 );

lcd.print(name);

lcd.setCursor (0, 3 );

lcd.print(F("SNo :S"));

lcd.setCursor (6, 3 );

lcd.print(sNumber);

delay(3000);

servo();

lcd.clear();

}

void checkTime(){

//check the time if the time is 6pm the system will stop working (time out)

lcd.home ();

lcd.clear();

if(n != 0){ //check the nuber of student is 0 or not

Serial.println(F("Warning!"));

Serial.print(F("Count not zero!"));

lcd.setCursor (6, 1 );

lcd.print(F("Warning!"));

lcd.setCursor (3, 2 );

lcd.print(F("Count not zero!"));

delay(5000);

}

//else{

Serial.println(F("Session has expired!"));

Serial.print(F("No of students :"));

Serial.println(n);

lcd.home ();

lcd.clear();

lcd.setCursor (6, 0 );

lcd.print(F("Library"));

lcd.setCursor (0, 1 );

lcd.print(F("Session has expired!"));

lcd.setCursor (0, 3 );

lcd.print(F("No of students :"));

lcd.print(n);

// }

delay(46800000);//delay for 12 hours

lcd.clear();

}

void loop() {

DateTime now = rtc.now();

if (now.hour() < 7 || now.hour() >= 18) {

checkTime();

}

printLoopLCD();//print details on lcd screen(loop)

readRFID();

}