Overview RC522 RFID HAT is an expansion board of a contact-less reader/writer card. It is designed for the Raspberry PI 4B. The module chip adopts RC522 . This product supports three types of transmission communication, I2C, SPI and UART. All I2C address lines are led out and can be configured freely by the users. On-board programmable passive buzzer and LEDs are available, so it allows users to do IC card experiments through sound and light prompts. At the same time, this makes the users observe the experimental phenomenon more clearly. It is convenient for the beginners to do the experiment of lighting up the LED, and learn the micro-controller motherboards as well, such as for Raspberry Pi . Chip Introduction RC522 is a highly integrated reader/writer for contact-less communication at 13.56MHz. It is a low-voltage, low-cost, small-sized and non-contacting read-write card chip, launched by NXP for "three-meter" applications. It is a good choice for the development of smart meters and portable handheld devices. Specifications Dimensions:85mm(L)*56.3mm(W) Operating Frequency:13.56MHz Communication Card Protocol:ISO/IEC14443A/MIFARE Communication Interface:SPI?I2C?UART Power Supply:3.3V/5V Package contents: 1. RC522 RFID HAT x1 2. MIFARE 1K(S50) Card x1 Please feel free to contact us via message if you have any problem.

Providing open development resources and tutorials  for the use of development boards for Raspberry Pi and STM32 . It supports classic encryption. The module supports ISO/IEC 14443 Type A communication protocols. 40Pin expansion connector for Raspberry Pi. The module adopts RC522 chip, a highly integrated reader/writer for contact-less communication at 13.56MHz.