Interface RFID With Arduino Uno

Radio-Frequency Identification (RFID) uses electromagnetic fields to transfer data through wireless.

• RFID Devices consist of two part
  • Tag
  • Reader
• Tag contain electronically stored information.
• Information read by the reader.

RFID Tag

• A RFID system uses tag, attached to the objects for identification.
• Readers send a signal to the tag and read its response.
• Tag is read-only the tag uses the radio energy transmitted by the reader.
• Each tag have unique serial number,by using this tag number it is easy to identify product details.

Rfid Reader

• There are different type of reader available in market.
  • Passive Reader Active Tag.
  • Active Reader Passive Tag.
  • Active Reader Active Tag.

Passive Reader Active Tag

• System has a passive reader which only receives radio signals from active tags (battery operated, transmit only).

Active Reader Passive Tag

• System has a active reader, which transmits interrogator signals and also receives authentication replies from passive tags.

Active Reader Active Tag

• System uses active tags a woken with an interrogator signal from the active reader.

Application

• Transportation payments.
• Transportation and logistics.
• Public transport.
• Libraries.
• Hospitals and healthcare.

Hardware Required

• RFID Reader.
• RFID Tag.
• Arduino.

Rfid Pinout

• Vin= +5V.
• Tx= Rx of Microcontroller.
• Gnd= Ground.

Circuit

virtual Circuit

Code

 char input[12];
 int count = 0;
 void setup()
 {
 Serial.begin(9600);
 }
 void loop()
 {
 if(Serial.available())
 {
 count = 0;
 while(Serial.available() && count < 12)
 {
 input[count] = Serial.read();
 count++;
 delay(5);
 }
 Serial.println("I  received: ");
 for(int i=0;i<12;i++)
 Serial.print(input[i]);
 Serial.println();
 }
 }