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Arduino Projects

RFID based students attendance system with message Alert

Description:

Students attendance

RFID based students attendance system with message Alert- In this tutorial, I will show you how to make an RFID students attendance system with an SMS alert using Arduino, MFRC522 RFID module, and GSM SIM900A Module. This tutorial explains step by step how to create your graphical user interface application in Visual Basic.Net “Vb.net”.  Before we discuss anything, first let me tell you in a few words how this project actually works.

First of all, a teacher swipes a card and is marked Present, then the timer is started and messages are sent to the students, that the teacher has arrived. As each student has given an RFID card, so if every student swipes his/her RFID card within the specified time, the student will be marked present. While the rest of the students will be marked absent and messages will be sent to their parents.


Amazon Links:

12v Adaptor:

Arduino Uno

Arduino Nano

Mega 2560:

MFRC522 RFID module with tags:

Sim900A GSM Module:

DC 5V 2A Adaptor

Other Tools and Components:

Top Arduino Sensors:

Super Starter kit for Beginners

Digital Oscilloscopes

Variable Supply

Digital Multimeter

Soldering iron kits

PCB small portable drill machines

*Please Note: These are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!


First, let’s start with the GSM module:

Students attendance

This is the GSM module, in the market, we have different types of GSM modules, the one I will be using today is sim900A if you want you can also use any other gsm module, like for example sim900D. I have also tested the same programming using sim900D but with a different baud rate, the rest of the program remains the same.

If you are from Pakistan, Bangladesh or India make sure you double-check the GSM module and purchase the unlocked version of the sim900A. This GSM sim900A module as you can see on the screen has no Onboard voltage regulator, so be careful while applying the voltage. The ideal voltage for this GSM module is 4.7v but you can also connect it with a 5v adaptor. If you don’t have a 5v adaptor then you can make your power supply using an lm317t adjustable variable voltage regulator, I have a very detailed tutorial on lm317t explaining everything. You can watch this video tutorial on my YouTube channel “Electronic Clinic”.


As you can see clearly in the picture above this module has so many pins that are clearly labeled, but we will be using only 5 of these pins, the power supply pins, GND, Rxd 5v, and TXD 5v. The GND will be connected with the Arduino GND, TXD will be connected with the Arduino pin 2 and RXD will be connected with the  Arduino pin 4.

 

MFRC522 RFID Module and its Pinout.

The first pin of the RFID module is the VCC and this will be connected with 3.3v of the Arduino.

Pin number 2 is the RST or reset, pin number 3 is the ground, while the MISO pin, MOSI PIN, SCK pin and NSS pin, these four pins in the Arduino are the SPI pins While in Arduino Mega these pins are different. So these pins will be connected with the Arduino SPI pins, In Arduino Uno the SPI pins are as follow.

pin number 13 is the SCK

pin number 12 is the MISO

pin number 11 is the mosi and

pin number 10 is the ss.

What is SPI :

SPI stands for “Serial Peripheral Interface”. It is a Synchronous serial data bus, which means that the data can travel in both the directions at the same time, as opposed to (for example) the I2c bus that cannot do so. To use Synchronous data transmission, the SPI bus makes use of the four wires, and they are called.

MISO: The MISO stands for Mater in, Slave Out. The purpose of this line is to carry data from the SPI support devices back to Arduino.

SCK: The SCK stands for the Serial Clock.

The IRQ pin is not used

MOSI: The MOSI stands for Master Out, Slave In. the purpose of this line is to carry data from the Arduino to the SPI supported devices.

SS: The SS stands for Slave Select. Each SPI supported device needs a unique SS line back to Arduino.


RFID based Students Attendance Circuit Diagram:

The complete circuit diagram is already explained in my previous articles, you can also watch video given at the end. But as a reminder, the ideal voltage to the SIM900A module is from 4.7 volts to 5 volts.

RFID based students attendance Arduino Programming:

Tags reading Program:

This is the program written for finding the identity numbers of RFID tags. Before you can control anything using the RFID system, first you need to find out the identity number of each tag, and then you can use that identification number to identify a RFID tag to control anything you want.



/*

 * Pin layout should be as follows:
 * Signal     Pin              Pin               Pin
 *            Arduino Uno      Arduino Mega      MFRC522 board
 * ------------------------------------------------------------
 * Reset      9                5                 RST
 * SPI SS     10               53                SDA
 * SPI MOSI   11               51                MOSI
 * SPI MISO   12               50                MISO
 * SPI SCK    13               52                SCK
 
 
 * voltage 3.3v  

 */

#include <SPI.h>
#include <MFRC522.h>

#define SS_PIN 10
#define RST_PIN 9
MFRC522 mfrc522(SS_PIN, RST_PIN);        // Create MFRC522 instance.

void setup() {
        Serial.begin(9600);        // Initialize serial communications with the PC
        SPI.begin();                // Init SPI bus
        mfrc522.PCD_Init();        // Init MFRC522 card
        //Serial.println("Scan a MIFARE Classic PICC to demonstrate Value Blocks.");
}

void loop() {
        
        // Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
        MFRC522::MIFARE_Key key;
        for (byte i = 0; i < 6; i++) {
                key.keyByte[i] = 0xFF;
        }
        // Look for new cards
        if ( ! mfrc522.PICC_IsNewCardPresent()) {
                return;
        }

        // Select one of the cards
        if ( ! mfrc522.PICC_ReadCardSerial()) {
                return;
        }
        // Now a card is selected. The UID and SAK is in mfrc522.uid.
        
        // Dump UID
        Serial.print("Card UID:");
        for (byte i = 0; i < mfrc522.uid.size; i++) {
                Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
                Serial.print(mfrc522.uid.uidByte[i], DEC);
        } 
        Serial.println();

        // Dump PICC type
        byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
        Serial.print("PICC type: ");
        Serial.println(mfrc522.PICC_GetTypeName(piccType));
        if (        piccType != MFRC522::PICC_TYPE_MIFARE_MINI 
                &&        piccType != MFRC522::PICC_TYPE_MIFARE_1K
                &&        piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
                //Serial.println("This sample only works with MIFARE Classic cards.");
                return;
        }
}


RFID and GSM sim900A combined programming of the Students attendance system:

/* terminal1 program
 
 ----------------------------------------------------------------------------- 
 * Pin layout should be as follows:
 * Signal     Pin              Pin               Pin
 *            Arduino Uno      Arduino Mega      MFRC522 board
 * ------------------------------------------------------------
 * Reset      9                5                 RST
 * SPI SS     10               53                SDA
 * SPI MOSI   11               51                MOSI
 * SPI MISO   12               50                MISO
 * SPI SCK    13               52                SCK
 * voltage 3.3v 
 
 */
 
 /*
l , m , n , o are the commands for student1 , student2 ... respectively. when the controller receives any of these commands 
a message will be sent to the parents of that student. 

a, b , c and d commands are used to let the students know that the 
teacher has arrived

*/

#include <SPI.h>
#include <MFRC522.h>
#include <SoftwareSerial.h>
SoftwareSerial SIM900(2, 4);
String textForSMS;


#define SS_PIN 10
#define RST_PIN 9
MFRC522 mfrc522(SS_PIN, RST_PIN);        // Create MFRC522 instance.


void setup() {
        Serial.begin(9600);        // Initialize serial communications with the PC
        SIM900.begin(19200);
        SPI.begin();                // Init SPI bus
        mfrc522.PCD_Init();        // Init MFRC522 card
        //Serial.println("Scan a MIFARE Classic PICC to demonstrate Value Blocks.");
        randomSeed(analogRead(0));
        delay(5000); 
}

void loop() {
        
  if(Serial.available() == 0)
  {
        // Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
        MFRC522::MIFARE_Key key;
        for (byte i = 0; i < 6; i++) {
                key.keyByte[i] = 0xFF;
        }
        // Look for new cards
        if ( ! mfrc522.PICC_IsNewCardPresent()) {
                return;
        }

        // Select one of the cards
        if ( ! mfrc522.PICC_ReadCardSerial()) {
                return;
        }
        // Now a card is selected. The UID and SAK is in mfrc522.uid.
        
        // Dump UID
        Serial.print("Card UID:");
        for (byte i = 0; i < mfrc522.uid.size; i++) {
             //   Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
             //   Serial.print(mfrc522.uid.uidByte[i], DEC);
        } 
        Serial.println();

        // Dump PICC type
        byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
    //    Serial.print("PICC type: ");
//Serial.println(mfrc522.PICC_GetTypeName(piccType));
        if (        piccType != MFRC522::PICC_TYPE_MIFARE_MINI 
                &&        piccType != MFRC522::PICC_TYPE_MIFARE_1K
                &&        piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
                //Serial.println("This sample only works with MIFARE Classic cards.");
                return;
        }
        // defining Cards here 
        // teacher
        if( (mfrc522.uid.uidByte[0] == 192) && (mfrc522.uid.uidByte[1] == 47) && (mfrc522.uid.uidByte[2] == 254) && (mfrc522.uid.uidByte[3] == 121) ) // teacher card
        {
        Serial.println("teacher");
        delay(2000);
    
        }
        
                // student1
        if( (mfrc522.uid.uidByte[0] == 189) && (mfrc522.uid.uidByte[1] == 54) && (mfrc522.uid.uidByte[2] == 235) && (mfrc522.uid.uidByte[3] == 213) ) // student1 card
        {
        Serial.println("stu1");
        delay(2000);
        }
        
                        // student2
        if( (mfrc522.uid.uidByte[0] == 198) && (mfrc522.uid.uidByte[1] == 69) && (mfrc522.uid.uidByte[2] == 34) && (mfrc522.uid.uidByte[3] == 75) ) // student2 card
        {
        Serial.println("stu2");
        delay(2000);
        }
        
                                // student3
        if( (mfrc522.uid.uidByte[0] == 00) && (mfrc522.uid.uidByte[1] == 47) && (mfrc522.uid.uidByte[2] == 115) && (mfrc522.uid.uidByte[3] == 137) ) // student3 card
        {
        Serial.println("stu3");
        delay(2000);
        }

        else 
        Serial.println("unregistered user");
        
}

// commands from graphical user interface application

  if ( Serial.available() > 0 )
  {
    char data = Serial.read();
  delay(1000);
    // messages to the students that the teacher has arrived
                   if(data == 'a') 
    {
        textForSMS =  "\nFahad:Teacher has arrived";  
  sendSMS5(textForSMS);
  Serial.println(textForSMS);
  Serial.println("message sent.");
   data = 'z' ; // garbage value
 delay(5000);  
    } 
    
                       if( data == 'b') 
    {
        textForSMS =  "\nRam:Teacher has arrived";  
  sendSMS6(textForSMS);
  Serial.println(textForSMS);
  Serial.println("message sent.");
   data = 'z' ; // garbage value
 delay(5000);  
    } 
    
        if( data == 'c') 
    {
        textForSMS =  "\nJan sher:Teacher has arrived";  
  sendSMS7(textForSMS);
  Serial.println(textForSMS);
  Serial.println("message sent.");
   data = 'z' ; // garbage value
 delay(5000);  
    } 
    
       if( data == 'd') 
    {
        textForSMS =  "\nWadood:Teacher has arrived";  
  sendSMS8(textForSMS);
  Serial.println(textForSMS);
  Serial.println("message sent.");
  data = 'z' ; // garbage value
 delay(5000);  
    } 
    
    // messages to their parents to let them know their son/daughter is absent
    
        if(data == 'l') 
    {
        textForSMS =  "\nFahad was absent today";  
  sendSMS1(textForSMS);
  Serial.println(textForSMS);
  Serial.println("message sent.");
   data = 'z' ; // garbage value
 delay(5000);  
    } 
    
      if( data == 'm') 
    {
        textForSMS =  "\nRam was absent today";  
  sendSMS2(textForSMS);
  Serial.println(textForSMS);
  Serial.println("message sent.");
   data = 'z' ; // garbage value
 delay(5000);  
    } 
    
        if( data == 'n') 
    {
        textForSMS =  "\nJan sher was absent today";  
  sendSMS3(textForSMS);
  Serial.println(textForSMS);
  Serial.println("message sent.");
   data = 'z' ; // garbage value
 delay(5000);  
    } 
    
       if( data == '0') 
    {
        textForSMS =  "\nWadood was absent today";  
  sendSMS4(textForSMS);
  Serial.println(textForSMS);
  Serial.println("message sent.");
  data = 'z' ; // garbage value
 delay(5000);  
    } 
    
  }
       
}

// user defined functions for sending messages to students and parents

// messages to students 

// student1
void sendSMS5(String message)
{
  SIM900.print("AT+CMGF=1\r");                     // AT command to send SMS message
  delay(100);
 SIM900.println("AT + CMGS = \"+923339218213\"");  // recipient's mobile number, in international format
 
  delay(100);
  SIM900.println(message);                         // message to send
  delay(100);
  SIM900.println((char)26);                        // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
 // SIM900power();                                   // turn off module
}

// student2
void sendSMS6(String message)
{
  SIM900.print("AT+CMGF=1\r");                     // AT command to send SMS message
  delay(100);
 SIM900.println("AT + CMGS = \"+923462573150\"");  // recipient's mobile number, in international format
 
  delay(100);
  SIM900.println(message);                         // message to send
  delay(100);
  SIM900.println((char)26);                        // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
 // SIM900power();                                   // turn off module
}

// student3
void sendSMS7(String message)
{
  SIM900.print("AT+CMGF=1\r");                     // AT command to send SMS message
  delay(100);
 SIM900.println("AT + CMGS = \"+923417088988\"");  // recipient's mobile number, in international format
 
  delay(100);
  SIM900.println(message);                         // message to send
  delay(100);
  SIM900.println((char)26);                        // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
 // SIM900power();                                   // turn off module
}
 // student4
void sendSMS8(String message)
{
  SIM900.print("AT+CMGF=1\r");                     // AT command to send SMS message
  delay(100);
 SIM900.println("AT + CMGS = \"+923444442500\"");  // recipient's mobile number, in international format
 
  delay(100);
  SIM900.println(message);                         // message to send
  delay(100);
  SIM900.println((char)26);                        // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
 // SIM900power();                                   // turn off module
}

// parents numbers

void sendSMS1(String message)
{
  SIM900.print("AT+CMGF=1\r");                     // AT command to send SMS message
  delay(100);
 SIM900.println("AT + CMGS = \"+923339218213\"");  // recipient's mobile number, in international format
 
  delay(100);
  SIM900.println(message);                         // message to send
  delay(100);
  SIM900.println((char)26);                        // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
 // SIM900power();                                   // turn off module
}

// parents number2
void sendSMS2(String message)
{
  SIM900.print("AT+CMGF=1\r");                     // AT command to send SMS message
  delay(100);
 SIM900.println("AT + CMGS = \"+923339313613\"");  // recipient's mobile number, in international format
 
  delay(100);
  SIM900.println(message);                         // message to send
  delay(100);
  SIM900.println((char)26);                        // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
 // SIM900power();                                   // turn off module
}

// parents number3
void sendSMS3(String message)
{
  SIM900.print("AT+CMGF=1\r");                     // AT command to send SMS message
  delay(100);
 SIM900.println("AT + CMGS = \"+923315248222\"");  // recipient's mobile number, in international format
 
  delay(100);
  SIM900.println(message);                         // message to send
  delay(100);
  SIM900.println((char)26);                        // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
 // SIM900power();                                   // turn off module
}
 // parents number4
void sendSMS4(String message)
{
  SIM900.print("AT+CMGF=1\r");                     // AT command to send SMS message
  delay(100);
 SIM900.println("AT + CMGS = \"+923336719515\"");  // recipient's mobile number, in international format
 
  delay(100);
  SIM900.println(message);                         // message to send
  delay(100);
  SIM900.println((char)26);                        // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
 // SIM900power();                                   // turn off module
}


Computer application Programming of students attendance system:

This application is designed in Visual Basic 2010 express Edition.

Option Explicit
Dim BUFFERS$
Private Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
Dim message As Integer
Dim search As String
Dim strTest As String
Dim user1 As Integer
Dim user2 As Integer



Dim time1 As Integer
Dim time2 As Integer

Dim mins As Integer
Dim secs As Integer

Dim teacherflag As Integer
Dim sflag1 As Integer ' student 1 flag
Dim sflag2 As Integer ' student 2 flag
Dim sflag3 As Integer ' student 3 flag


Dim msending As Integer ' message sending flag

Dim absent1 As Integer
Dim absent2 As Integer
Dim absent3 As Integer


Dim absentflag As Integer

Dim flag1 As Integer
Dim flag2 As Integer
Dim flag3 As Integer

Dim counter As Integer



Private Sub Form_Load()
mins = 0
Timer3.Enabled = False
teacherflag = 0
sflag1 = 0
sflag2 = 0
sflag3 = 0


msending = 0

absent1 = 0
absent2 = 0
absent3 = 0


absentflag = 0

flag1 = 0
flag2 = 0
flag3 = 0

counter = 0
'MSComm1.Settings = "9600,n,8,1"      'Change this with the Baud rate of your modem (The one you use with Hyper Terminal)
'MSComm1.CommPort = 10                   ' Change this with the port your Modem is attached,(eg bluetooth)
'MSComm1.PortOpen = True

With MSComm1
        .CommPort = 3
        .Settings = "9600,N,8,1"
        .Handshaking = comRTS
        .RTSEnable = True
        .DTREnable = True
        .RThreshold = 1
        .SThreshold = 1
        .InputMode = comInputModeText
        .InputLen = 0
        .PortOpen = True 'must be the last
    End With
    



End Sub






Private Sub Timer1_Timer()


txtrec.Text = MSComm1.Input
search = txtrec.Text
If (InStr(search, "teacher") And (teacherflag = 0)) Then   ' when the teacher will swipe the rfid card the word teacher will be sent to the computer
Check3.Value = 1
Timer3.Enabled = True ' timer3 is used for timing mins and secs
teacherflag = 1
Timer4.Enabled = True
End If

If (InStr(search, "stu1") And (sflag1 = 0) And mins < 6) Then    ' then the student1 will be marked present
Check4.Value = 1
sflag1 = 1
End If

If (InStr(search, "stu2") And (sflag2 = 0) And mins < 6) Then    ' then the student1 will be marked present
Check5.Value = 1
sflag2 = 1
End If

If (InStr(search, "stu3") And (sflag3 = 0) And mins < 6) Then    ' then the student1 will be marked present
Check6.Value = 1
sflag3 = 1
End If





End Sub






Private Sub Timer2_Timer()
Label5.Caption = Time

End Sub

Private Sub Timer3_Timer()
secs = secs + 1
Label7.Caption = secs

If secs > 59 Then
secs = 0
mins = mins + 1
Label3.Caption = mins
End If



End Sub

Private Sub Timer4_Timer()
' sending message to students to let them know that the teacher has arrived.
' in the controller program each and every user will have its own message sending function in which his number will be specified.
counter = counter + 1
Label3.Caption = counter

If ((teacherflag = 1) And ((counter > 10) And (counter < 20)) And (Check8.Value = 0)) Then
Check8.Value = 1
End If

If ((teacherflag = 1) And ((counter > 30) And (counter < 40)) And (Check9.Value = 0)) Then
Check9.Value = 1
End If


If ((teacherflag = 1) And ((counter > 50) And (counter < 60)) And (Check10.Value = 0)) Then
Check10.Value = 1
End If



If ((teacherflag = 1) And ((counter > 90) And (counter < 120)) And (Check12.Value = 0)) Then ' this when checked means all messages are sent
Check12.Value = 1
End If

' check box for parents messages

If ((Check12.Value = 1) And ((counter > 300) And (counter < 320) And (Check4.Value = 0))) Then ' this when checked means all messages are sent
Check13.Value = 1
End If

If ((Check12.Value = 1) And ((counter > 330) And (counter < 350) And (Check5.Value = 0))) Then ' this when checked means all messages are sent
Check14.Value = 1
End If

If ((Check12.Value = 1) And ((counter > 370) And (counter < 380) And (Check6.Value = 0))) Then ' this when checked means all messages are sent
Check15.Value = 1
End If

If ((Check12.Value = 1) And ((counter > 390) And (counter < 400) And (Check7.Value = 0))) Then ' this when checked means all messages are sent
Check16.Value = 1
End If

'*************************************

If ((Check8.Value = 1) And (flag1 = 0)) Then

MSComm1.Output = "a"
flag1 = 1
End If

If ((Check9.Value = 1) And (flag2 = 0)) Then

MSComm1.Output = "b"
flag2 = 1
End If

If ((Check10.Value = 1) And (flag3 = 0)) Then

MSComm1.Output = "c"
flag3 = 1
End If



' messages sending to their parents


If ((Check13.Value = 1) And (absent1 = 0)) Then

MSComm1.Output = "l"
absent1 = 1
End If

If ((Check14.Value = 1) And (absent2 = 0)) Then

MSComm1.Output = "m"
absent2 = 1
End If

If ((Check15.Value = 1) And (absent3 = 0)) Then

MSComm1.Output = "n"
absent3 = 1
End If

End Sub

 


Watch Video Tutorial:

 

Engr Fahad

My name is Shahzada Fahad and I am an Electrical Engineer. I have been doing Job in UAE as a site engineer in an Electrical Construction Company. Currently, I am running my own YouTube channel "Electronic Clinic", and managing this Website. My Hobbies are * Watching Movies * Music * Martial Arts * Photography * Travelling * Make Sketches and so on...

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