Serial.println("Approximate your card to the reader.") įor (byte i = 0 i < i++) Serial.begin(9600) // Initiate a serial communication MFRC522 mfrc522(SS_PIN, RST_PIN) // Create MFRC522 instance. The module can support I2C, SPI and UART and is usually shipped with RFID cards and key-chain. The RC522 is a 13.56MHz RFID module based on the MFRC522 controller from the NXP semiconductor. A reader generates an electromagnetic f field which causes electrons to move through the tag’s antenna and subsequently power the chip. To read the information encoded on a tag, it is placed in close proximity to the reader (need not be within the reader’s direct line-of-sight). Instead, it has a microchip that stores and processes information, and an antenna to receive and transmit a signal. On the other hand, the tag is usually a passive device, which means it does not have a battery. Working Principle of RFID Reader TechnologyĪ reader consists of a radio frequency module and an antenna that generates a high frequency electromagnetic field. A tag that is attached to an object that has to be identified, and a transceiver that is known as the interrogator/interrogator. The RFID or Radio Frequency Identification System consists of two main components, a transponder/s.
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