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How do I use RFID on Raspberry Pi?
The first step is to enable SPI on the Raspberry Pi. To do this, open a command line window and enter sudo raspi-config. This will open the Configuration Menu. Select menu 5 “Interfacing Options.” Now select “P4 SPI.” When asked if you want to enable the SPI Interface, select yes.
Generally speaking RFID tag maximum read distances are as follows: 125 kHz. and 134.3 kHz. Low Frequency (LF) Passive RFID Tags -read distance of 30 cm (1 foot) or less – usually 10 cm (4 inches) unless you are using a very large tag which can have a read distance of up to 2 meters when attached to metal.
What kind of RFID reader is rc522?
The RC522 is a RF Module that consists of a RFID reader, RFID card and a key chain. The module operates 13.56MHz which is industrial (ISM) band and hence can be used without any license problem. The module operates at 3.3V typically and hence commonly used in 3.3V designs.
What kind of memory does the rc522 reader have?
The keychain has 1kB memory in it which can be used to stored unique data. The RC522 reader module can both read and write data into these memory elements. The reader can read data only form passive tags that operate on 13.56MHz.
What kind of RFID is used in attendance systems?
The RC522 is a 13.56MHz RFID module that is based on the MFRC522 controller from NXP semiconductors. The module can supports I2C, SPI and UART and normally is shipped with a RFID card and key fob. It is commonly used in attendance systems and other person/object identification applications. RC522 Pin Configuration.
Can a 5V microcontroller be used with a RFID module?
But, the communication pins of this module are 5V tolerant and hence it can be used with 5V microcontrollers also like Arduino without any additional hardware. The module supports SPI, IIC and UART communication but out of these SPI is often used since it is the fasted with a maximum data rate of 10Mbps.