![]() In some versions of RC522, this pin is denoted by 3V3 on the module instead of VCC. RC522 Pinout DiagramĪll the pins of MFRC/RC522 RFID card Reader are: The onboard microcontroller won’t make the module a stand-alone device. Therefore, the device may have its microcontroller chip on itself but it only makes it to works as an RFID. So, the first one is power and the second one is the communication pins. ![]() In this module, there are only two kinds of pins. In most of the security and commercial products, the module is effective because the errors and issues with RFID Tags are detectable by it. The RFID cards communicate with the module at a short distance with radio frequency due to the mutual induction technique. The RC522 module works on 13.56 MHz frequency and it can act as a reader and write for UID/RFID cards. The module allows the developers to interface it with any other SPI, I2C, and UART based microcontrollers. The RC522 is known as MFRC-522 due to its NFX semiconductor microcontroller. ![]() ![]() RC522 is a Multi-communication RFID Module for Arduino and Microcontrollers. ![]()
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