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How to connect Arduino and RFID




Arduino and RFIDOn this instructable I will try to show how to interface a RFID sensor with the Arduino. I am using the RFID sensor from seeedstudio the serial version of it. There are a few parts you will gonna need. I also bought some RFID keys.

UPDATE: Now it works with IDE 021

Step 1 What you gonna need?

– Arduino Board
– RFID Sensor from seeedstudios
– Wires
– Protoboard
– RFID tags (125kHz) from seeedstudios

Step 2 Plugging all together

Plugging all togetherConnect the antenna on the appropriate pins like the first photo.

Plug the RFID sensor to the protoboard like the second photo above.

Only 3 wires are required to interface, 2 wires for supply and another for the serial line(communication)
The wires as connected as the third photo shows.
On RFID sensor: PIN 1 -> Tx
PIN 2 -> Rx (Not Used)
PIN 3 -> NC
PIN 4 -> GND
PIN 5 -> VCC (+5V)

Tx from RFID board goes to Digital PIN 2 on Arduino Board.

That is all you gonna need to wire.

Moving on to next step, the software.

For more Detail: How to connect Arduino and RFID

This free embedded project also found using:

  • rfid arduino
  • arduino rfid
  • rfid atmega
  • rfid sensor
  • how to connect rfid sensor with arduino

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