PN532 NFC RFID Reader Writer Module for Arduino Projects

The PN532 NFC RFID Reader Writer Module is a compact solution for 13.56 MHz contactless communication. It supports Near Field Communication (NFC) and classic RFID operations, making it suitable for both basic and advanced embedded projects.

The module operates in:

• RFID reader/writer mode  

• ISO14443-A card emulation mode  

This enables experimentation in authentication, device pairing, attendance systems, and secure access control applications.

Mini Q&A:

Q: Is this module beginner friendly?

A: Yes. Interface switching and onboard antenna simplify setup.

## Technical Architecture

The module is built around the PN532 NFC controller chip with integrated protocol handling and host communication support.

Supported Interfaces:

• I2C – simple wiring

• SPI – high-speed communication

• HSU (UART) – serial communication

Interface selection is done using the onboard SMD switch before powering the module.

## Why Choose This Module?

• Supports NFC smartphone communication

• Offers card emulation capability

• Multi-interface flexibility

• Stable performance for lab use

• Compatible with 3.3V and 5V systems

## Pin Overview

• VCC

• GND

• SDA / SCL (I2C)

• MOSI / MISO / SCK / SS (SPI)

• TX / RX (UART)

## Power Requirements

• Operating Voltage: 3.3V – 5V

• SPI logic: 3.3V

• I2C / UART logic: 3.3V compatible

Do not power with 12V.

## Applications

• RFID access control systems

• NFC attendance systems

• IoT authentication modules

• Smart lockers

• Secure identification demos

• Engineering lab experiments

• Final-year student projects

## Institutional Use

Suitable for bulk academic procurement. Commonly used in embedded systems, IoT, and electronics training labs.

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1️⃣1️⃣ KEY FEATURES

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• PN532-based NFC and RFID module  

• Operates at 13.56 MHz  

• Supports I2C, SPI, and UART  

• Onboard PCB antenna  

• 3.3V and 5V compatible  

• Supports ISO14443-A cards  

• NFC smartphone interaction support  

• Interface selection switch onboard  

• Suitable for student and lab use  

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1️⃣2️⃣ TECHNICAL SPECIFICATIONS

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• Operating Frequency: 13.56 MHz  

• Communication Distance: 5 cm – 7 cm  

• Operating Voltage: 3.3V – 5V  

• SPI Logic Level: 3.3V  

• Microcontroller Core: 80C51  

• On-chip Memory: 40 KB ROM, 1 KB RAM  

• Module Size: 42.7 × 40.4 × 4 mm