Introduction
In this Arduino tutorial, we will be focusing on using the MFRC522 RFID module to read data. This module, also known as the RFID RC522, is a commonly used RFID module in various projects. By the end of this tutorial, you will learn how to connect and utilize the MFRC522 RFID module with your Arduino board.
Hardware Setup
Before we begin coding, let’s first take a look at the pinout of the MFRC522 module and how it should be connected to the Arduino board.
Software Setup
In order to use the MFRC522 library with your Arduino, you will need to include both the SPI and MFRC522 libraries. The SPI library enables communication with devices using the SPI protocol, while the MFRC522 library contains specific functions for controlling the RFID module.
Connecting the Pins
Now, let’s connect the necessary pins of the MFRC522 module to the Arduino board. The SC (Serial Clock) pin should be connected to pin 52 on the Arduino Pro Micro. The SDA (Serial Data) pin should be connected to pin 50. The SS (Slave Select) pin, which is the main pin for the SPI interface, should be connected to pin 53.
The module also requires a ground connection, so make sure to connect its GND pin to the GND pin on the Arduino board. The RST (Reset) pin of the module should be connected to the RST pin on the Arduino board. Lastly, connect the VCC pin of the module to the 3.3V pin on the Arduino board.
Voltage Regulation
If your Arduino board has a 3.3V and 5V pin, you can directly connect the VCC pin of the module to the 3.3V pin. However, if you are using a different board that doesn’t have a 3.3V pin, you will need a voltage regulator to ensure that the module receives the correct voltage. Connect the VCC pin of the module to the raw pin of your Arduino board, which is connected to a 5V power supply.
Including Libraries
Once you have made all the necessary connections, it’s time to include the required libraries in your Arduino code. Make sure to include both the SPI and MFRC522 libraries at the beginning of your code. This will allow you to use the functions provided by these libraries to control the MFRC522 module.
With the hardware and software setup complete, you are now ready to start reading data using the MFRC522 RFID module with your Arduino board. Good luck with your projects!
Creating a Character and Naming the RFID Module
To begin with the Arduino tutorial on MFRC522 RFID reading data, the first step is to create a character called rst with the value “rst”. This character will be used later on. Next, you need to name your RFID module.
Setting up SDA and RST Pins
After naming your RFID module, you need to set up the SDA pin (also known as the SS pin) and the RST pin. These pins are crucial for the proper functioning of the RFID module. Make sure to connect them correctly to your Arduino board.
Initializing the Key and a Loop
Once the pins are set up, you can move on to initializing the key. Use the code byte I = 0 to set the initial value of the key as 0. This key will be used for certain operations later on. After initializing the key, create a loop to continuously read for new cards.
Checking for New Cards and Handling Errors
Within the loop, use conditional statements to check if there is a new card present. If there is no new card, return. Similarly, if there is an error in reading the card, return. This ensures that the program continues only when a new card is detected without any errors.
Displaying Information
After detecting a new card, you can use the serial.printLn() function to display a message like “Detecting…”. Additionally, you can use the rfid.plccDumpToSerial() function to display detailed information about the RFID card. If you prefer less information, you can use the plccDumpDetails() function instead.
Showcasing Errors
If you want to view any errors that occur during the process, you can use the status quo function. This function can be found in one of the example codes provided. Including this function will allow you to see any errors and troubleshoot issues effectively.
Thank you for following along with this Arduino tutorial on MFRC522 RFID reading data. If you found this video helpful, please leave a like and consider subscribing for more tutorials.
