Created December 31, 2019 © GPL3+

Arduino RFID based Door Lock

The RFID Door Lock is the lock that can be installed simply at your home and allows to easily lock and unlock doors

Intermediate17

Things used in this project

Hardware components

Arduino UNO

EM 18 RFID reader module

Relay (generic)

LED (generic)

Buzzer

Connecting wires

Software apps and online services

Arduino IDE

Story

About Project:

EM-18 RFID reader:

EM-18 RFID reader works at 125 kHz and it comes with an on-chip antenna and it can be powered with 5V power supply. It gives serial output along with Weigand (Wiegand is the most popular communication method utilized by access control devices)output. The range is around 8-12cm. serial communication parameters are 9600bps, 8 data bits, 1 stop bit.

The output provided by EM-18 RFID reader is in 12 digit ASCII format.

EM-18 Reader Module

The RFID system contains two components: an RFID tag and a Reader. An antenna is for sending the data to the RFID reader module. Whenever the RFID tag arrives in the range of RFID reader, RF signal power the tag and then tag begins sending data serially. Data is further accepted by the RFID reader and the reader transfers it to the Arduino board. After that as per the code, the different tasks will perform.

In this circuit, we have saved the value of the RFID tag in the code. So, whenever that specific tag comes in range, the relay gets initiated. Whenever the Relay gets initiated the door lock will be opened.

If we scan any other RFID card than a specific tag, the buzzer will begin to beep as it’s the wrong RFID tag.

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Code

Run a program

char tag[] ="180088F889E1"; 
char input[12];         
int count = 0;        
boolean flag = 0; 
void setup()  
{
  pinMode(2,OUTPUT); 
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  Serial.begin(9600);    

}
    void loop()
{
  digitalWrite(3,1);
  if(Serial.available())
  {
    count = 0;
  while(Serial.available() && count < 12)
    {
      input[count] = Serial.read(); 
      count++; 
      delay(5);
    }
    if(count == 12)
    {
      count =0;
      flag = 1;
      while(count<12 && flag !=0)  
      {
        if(tag[count]==input[count])
        flag = 1; 
        else
        flag= 0;
}
    if(flag == 1) 
    {
      digitalWrite(2,HIGH);
       digitalWrite(3,LOW);
      delay(5000);
      digitalWrite(2,LOW);
    }
     if(flag == 0)
      {
       for(int k =0; k<= 10; k++)
      {
        digitalWrite(4,HIGH);
      }
      }
    }
  }
}

Credits

hIOTron

78 projects • 2 followers

hIOTron is an internet of things based company that offers an IoT Platform, products, IoT Solutions, and IoT Training.

Arduino RFID based Door Lock

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Arduino RFID door lock

Code

Run a program

Credits

hIOTron

Comments

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Arduino RFID based Door Lock

Arduino RFID based Door Lock

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Arduino RFID door lock

Code

Run a program

Credits

hIOTron

Comments

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