RFID Based Door Lock (EM-18)

Just Do Electronics April 17, 2020

RFID Based Door Lock

CIRCUIT DIAGRAM :-

CODE :-

 
 
//Prateek
//www.prateeks.in

#define RELAYPIN 2
#define WARNLEDPIN 2
char tag[] ="4000350ABAC5";

char input[12];        
int count = 0;       
boolean flag = 0;     
void setup()
{
  Serial.begin(9600);   
  pinMode(RELAYPIN,OUTPUT); 
  pinMode(WARNLEDPIN,OUTPUT);
}
void loop()
{
  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(input[count]==tag[count])
        flag = 1; 
        else
        flag= 0; 
                              
        count++; 
      }
    }
    if(flag == 1) 
    {
      Serial.println("Access Allowed!");
      digitalWrite(RELAYPIN,HIGH);
      delay (5000);
      digitalWrite (RELAYPIN,LOW);
    }
    else
    {
      Serial.println("Access Denied");
      digitalWrite(WARNLEDPIN,HIGH);
      delay(5000);
      digitalWrite(WARNLEDPIN,LOW);
    }
 
    for(count=0; count<12; count++) 
    {
      input[count]= 'F';
    }
    count = 0; 
  }
}

PHOTO :-

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