# PN532 NFC RFID Module V4: A Comprehensive Guide ## Introduction to PN532 NFC RFID Module V4 The **PN532 NFC RFID Module V4** is one of the most versatile and widely used modules for Near Field Communication (NFC) and Radio Frequency Identification (RFID) projects. Based on the NXP PN532 chipset, this module allows microcontrollers like Arduino, Raspberry Pi, and others to read and write NFC tags, communicate with other NFC devices, and even emulate an NFC card. In my personal experience working with embedded systems, the PN532 has been a game-changer for prototyping smart access control systems and interactive installations. Its reliability and extensive library support make it a favorite among hobbyists and professionals alike. ## Technical Specifications and Detailed Parameters For developers and engineers, understanding the precise technical specifications is crucial for integration. Below are the detailed parameters for the **PN532 NFC RFID Module V4**. Please note: *These technical parameters are for reference only. For exact specifications, please contact the backend management.* * **Chipset:** NXP PN532 * **Chip Code:** PN532C1 (Common variant; other codes like PN532I/C1 may exist) * **Supported Communication Interfaces:** * I2C (Inter-Integrated Circuit) * SPI (Serial Peripheral Interface) * HSU (High-Speed UART) * **Operating Frequency:** 13.56 MHz * **Supported Protocols:** * NFC: NFCIP-1 (ISO/IEC 18092) at 106 kbps * RFID: ISO/IEC 14443 Type A & B, ISO/IEC 18092, FeliCa™ * **Operating Voltage:** 3.3V (Logic Level: 3.3V. **Caution:** Do not apply 5V directly to pins.) * **Current Consumption:** * Typical: ~80mA during RF operation * Sleep Mode: < 10µA * **Effective Read/Write Range:** Typically 3-5 cm, depending on antenna design and tag type. * **Module Dimensions (V4 Common Board):** * Length: 40.0 mm * Width: 60.0 mm * Height (excluding headers): ~ 10 mm * **Antenna:** Integrated PCB antenna. * **Interface Pin Headers:** Standard 2.54mm pitch headers for I2C, SPI, UART, and power. ## Personal Applications and Skill Development My journey with the **PN532 NFC RFID Module V4** began when I wanted to create a personalized smart locker. This project required not just coding skills but also an understanding of wireless protocols. The module's ability to handle multiple interfaces was a personal advantage, as I could switch from I2C to UART when debugging with different microcontrollers. I believe that hands-on projects with such modules are the best way to