Updated: Aug 9
In this project we will learn how to use an Arduino to create an RFID tagging system using RC522 module. We will also learn to integrate various other parts such as I2C, LCD, LEDs, Servo motor, Buzzer etc., in order to create an automatic door lock system. We use an SPI (Serial Peripheral Interface) connection. It is a synchronous serial data protocol used by microcontroller for communicating with peripheral devices.
The Arduino is a programmable #microcontroller, it's an open-source electronics proto-type platform. It interacts with the user by receiving input with the aid of sensors and provides the output employing LED, buzzer, etc.,
In order to know more about the Arduino UNO, refer to this article.
The RC522 is a 13.56MHz RFID module. The module supports I2C, SPI and UART. The module operates at 3.3V typically and hence it is commonly used in 3.3V designs. It is used in applications involving identification of a person/object with a unique ID. It can both read and write data into the memory elements.
A #breadboard is a flat piece of wood that is provided with holes that allow users to build a circuit including the components and connections without the need for soldering due to which it is reusable and finds its best usage for the students who are new to build circuits. The holes in any horizontal line will be in series whereas the vertical holes remain at an equipotential state. There are different sizes of breadboards available in the market which include "full size", "half size" and, "mini size" breadboards.
The Buzzer is an audio signaling device, in this case when it detects an object, the buzzer gives a beep sound.
Connecting wires are used to establish connections between different components in the circuit.
Resistor as the name signifies, opposes the flow of electrons. The Resistor is a passive element and has two terminals. They are basically used to monitor the current flow and also as voltage dividers. The #resistor that we would use in this circuit is a 220 ohm resistor and the color code for this resistor is Red, Red, Brown & Gold.
A #servomotor is a rotary or linear actuator that allows for precise control of angular or linear position, velocity, and acceleration. A servomotor is a closed-loop servomechanism that uses position feedback to control its motion and final position.
LCD- Liquid Crystal Display is an electronic module that uses liquid crystal to produce a visible image. It is the basic module that is generally used in DIY and circuits. The display segments are affordable and simply programmable.
LED is a semiconductor light source that emits light when a current passes through it. Electrons in the semiconductor combine with holes by passing through the gap which inturns release energy in the form of photons.
The Arduino Integrated Development Environment (IDE) is a cross-platform application (for Windows, macOS, Linux) that is written in functions from C and C++. It is used to write and upload programs to Arduino compatible boards, but also, with the help of third-party cores, other vendor development boards.
The circuit connection involves the following steps:
The ground pin of the Arduino is connected to the ground pin of the RFID-RC522.
3.3V pin of the Arduino is connected to Vcc of the RFID module.
The Reset pin goes to digital pin 9 of the Arduino.
The MISO pin goes to pin 12 of the Arduino.
The MOSI pin goes to pin 11 of the Arduino.
The SCK pin goes to pin 13 of the Arduino.
The SDA pin goes to pin 10 of the Arduino.
Learn How to build an RFID Tagging system using an Arduino UNO board and a 16*2 LCD display.
Download Libraries -
Link for MFRC522 library
Link for I2C LCD library
The UFID tagging system is used in this project to identify and give access to a unique person or object. Initially, the UFID number of the right person/object is stored and whenever a user is askiing for the access, it compares the user's number with the stored number and if they match, then the access will be given otherwise access will be denied.
Video By - Aishwarya Balajee and edited by Neha Patil
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Content Written by-
Name - Kiranmai Chigurupati
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