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  • 13.56MHz RFID module
  • Operating voltage: 2.5V to 3.3V
  • Communication : SPI, I2C protocol, UART
  • Maximum Data Rate: 10Mbps
  • Read Range: 5cm
  • Current Consumption: 13-26mA
  • Power down mode consumption: 10uA (min)


  • RFID RC522 uses mutual induction to activate the cards and 13.56MHz for data transfer.
  • The RFID Cards are useable from both sides of the module at max 5cm.
  • 3.3V is required to activate the device.
  • Its auto-sleep mode makes it less power consumption module.
  • The module has three kinds of communications (UART, SPI, I2C). Therefore, it is useable with almost every microcontroller or device in the market.
  • RC522 is a Multi-communication RFID Module for Arduino and Microcontrollers. The RC522 is known as MFRC-522 due to its NFX semiconductor microcontroller.
  • The module allows the developers to interface it with any other SPI, I2C, and UART based microcontrollers.
  • The RC522 module works on 13.56 MHz frequency and it can act as a reader and write for UID/RFID cards.
  • The RFID cards communicates with the module at a short distance with radio frequency due to the mutual induction technique. In most of the security and commercial products, the module is effective because the errors and issues with RFID Tags are detectable by it.
  • RFID has most of the usage as a security device.
  • Some airports also start using RFID to identify and keep track of bags and other items.
  • The attendance or Parking system also uses RFID to keep the system secure.


  • Automatic billing systems
  • Attendance systems
  • Verification/Identification system
  • Access control systems