This RFID kit comes pre assembled so all you will need to do is plug your arduino in it and you will be good to go.

This RFID works on uart protocol so to read the RFID tag we will need to read the uart data.

In this sample code we will read the RFID tag and will display it on the serial monitor.

int count = 0;                                          // count = 0
char input[11];                                         // character array of size 12 
                                 
void setup()
{
   Serial.begin(9600);                                  // begin serial port with baud rate 9600bps
}
void loop()
{
   
   if(Serial.available())
   {
      count = 0;
      while(Serial.available() && count < 12)          // Read 12 characters and store them in input array
      {
         input[count] = Serial.read();
         count++;
         delay(5);
      }
      Serial.print(input);                             // Print RFID tag number 
      Serial.print("\n");   
   }
}

Using the earlier code we will read the RFID tags we have and then we will save them in a data base and then when the next time user brings his card near the RFID reader we will read and will compare it with the existing database.
# Arduino-RFID-Shied

#How to interface RFID Reader with arduino
#https://www.controleverything.com/content/RFID-Reader?sku=ANI2CU_EM18_RFID
int count = 0;                                          // count = 0
char input[11];                                         // character array                               
void setup()
{   
Serial.begin(9600);                                  // begin serial port with baud rate 9600bps
}
void loop()
{     
 if(Serial.available())   
{      
count = 0; 
     while(Serial.available() && count < 12)          // Read 12 characters and store them in input array     
 {         input[count] = Serial.read();    
     count++;      
   delay(5);     
 }     
 Serial.print(input);                             // Print RFID tag number       
Serial.print("\n");    
  if ( strcmp(input,"0A006FBE33E9") == 0)   
   {   
     Serial.print("Tag One");        Serial.print("\n"); 
     }
     if ( strcmp(input,"0E004560173D") == 0)   
   {     
   Serial.print("Tag Two");    
    Serial.print("\n");    
  }
     if ( strcmp(input,"0A00706AF0E1") == 0)   
   {        
Serial.print("Tag Three");      
  Serial.print("\n");  
    }
    if ( strcmp(input,"28018389B696") == 0)  
    {        Serial.print("Tag Four");   
     Serial.print("\n");   
   }
         }
}

there is a lot which can be done with Arduino and this RFID shield.

1. RFID controlled gate

2. RFID controlled Door lock

3. RFID controlled lights

4. RFID attendance system

There is no soldering required in this kit so this is an ideal kit for schools,kids, software developers and all the people who doesn't want to do soldering.

this kit can be purchased from here.

Arduino RFID kit