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SparkFun RFID Starter Kit Hookup Guide 

Introduction

The SparkFun RFID Starter Kit gives you the tools you need to start 
reading RFID tags with your computer or microcontroller!

Required Materials

The kit contains:

• 1x RFID USB Reader
• 1x ID-12LA RFID Module
• 2x 125KHz RFID cards

You will also need a USB mini-B cable to connect the USB reader to a 
computer.

Recommended Reading

The ID-12LA module has a serial output. If you’ve never worked with a 
serial device or a terminal program before, you might want to take a look at 
these tutorials first.

• Serial Communication
• Serial Terminal Basics
• Tim’s RFID Comparison video - Let Tim from Tech Support walk you 

through our entire line of RFID options, complete with range tests.

• SparkFun Simple Sketches - RFID Starter Kit video - A simple video 

demo of the RFID Starter Kit in action.

RFID Overview

But Wait, What is RFID?

Page 1 of 10

Summary of Contents for RFID Starter Kit

Page 1: ...reader to a computer Recommended Reading The ID 12LA module has a serial output If you ve never worked with a serial device or a terminal program before you might want to take a look at these tutorial...

Page 2: ...sy of EPC RFID Passive tags like the ones included with this kit gather electromagnetic energy from the card reader and use that to transmit their unique serial number More sophisticated tags may have...

Page 3: ...ing features 1 A buzzer that sounds when a card is read If you are using the RFID kit in a stealth application you can disconnect the buzzer by removing the blob of solder on the Buzz jumper 2 A card...

Page 4: ...Serial Monitor The default terminal settings 9600 baud no line ending are fine The monitor should be blank Wave a card over the reader You should hear a beep and see something like this Now we ll do...

Page 5: ...an again Now the bread is visible That s cool right Example Project As fun as it is to watch your cards pop up in the serial terminal you d probably like to do something with all this power The exampl...

Page 6: ...pins on the RFID USB Reader to the Arduino s 5V GND and D2 pins and connect the servo to 5V GND and D9 Upload the below code open your Serial Monitor by going to Tools Serial Monitor and start scanni...

Page 7: ...y adapted from http bildr org 2011 02 rfid arduino include SoftwareSerial h include Servo h Choose two pins for SoftwareSerial SoftwareSerial rSerial 2 3 RX TX Make a servo object Servo lockServo Pick...

Page 8: ...ing the Arduino can read faster than the ID module c an deliver if rSerial available tagLen tag true if tag true while rSerial available Take each byte out of the serial buffer one at a tim e readByte...

Page 9: ...next tag read for int c 0 c idLen c newTag c 0 This function steps through both newTag and one of the know n tags If there is a mismatch anywhere in the tag it will r eturn 0 but if every character in...

Page 10: ...the module removed so you can read the silk Resources and Going Further You can use the SparkFun RFID Reader Kit and an Arduino to control access to just about anything Instead of moving a servo how a...

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