MRFC522 RFID
The MRFC522 RFID module is a popular and inexpensive component used for Radio Frequency Identification (RFID) applications, allowing for wireless data exchange between an RFID reader and RFID tags or cards. The MRFC522 module uses the MIFARE technology and typically operates at a frequency of 13.56 MHz, which is commonly used in contactless smart cards, access control systems, and inventory management.
The MRFC522 module communicates with a microcontroller, such as an Arduino, using SPI (Serial Peripheral Interface), enabling fast and reliable data transfer. It can read and write data to RFID tags or cards, making it useful for applications like door access control, student attendance systems, and cashless payment systems.
The module has a simple interface, with SDA, SCK, MOSI, MISO, and RST pins that connect to the Arduino. The SPI communication protocol allows for easy integration with various microcontrollers. The MRFC522 is capable of reading various RFID cards, including MIFARE Classic 1K, MIFARE Ultralight, and other compatible tags.
In addition to its reading capabilities, the MRFC522 module has a range of 2-5 cm depending on the tag and environmental factors. It’s widely used in DIY RFID projects and is supported by libraries like MFRC522 for Arduino, making it accessible for both beginners and advanced users in the electronics and automation fields.