Overview

This NFC + Audio + LEDs + SD Card development module is built around an ESP32-S3 microcontroller, featuring a PN5321 NFC reader, MAX98357 I²S amplifier, eight WS2812B addressable RGB LEDs, and a MicroSD card slot—ideal for creating synchronized audio-visual interactions, NFC-triggered behaviors, and local storage for audio or data.

Key Features

• Microcontroller & Connectivity
  Powered by the ESP32-S3 SoC, offering Wi-Fi, Bluetooth LE, and sufficient computational capacity for real-time audio decoding, LED effects, NFC operations, and SD card access.

• NFC Reader
  Utilizes PN5321 to support ISO/IEC 14443 A/B tags, peer-to-peer NFC, and emulation modes. Compatible with MIFARE Classic/Ultralight/DESFire, Innovision Jewel, FeliCa, and NTAG215 card types.

• Audio Output
  MAX98357 amplifier delivers up to 3 W audio to the included speaker via I²S with excellent clarity.

• RGB LED Effects
  Eight WS2812B LEDs allow full RGB control per pixel—perfect for status indicators, sound-sync lighting, animations, and more.

• SD Card Interface
  Onboard MicroSD card slot (supports up to 32 GB) for local storage of audio files, logs, or configuration data.

• Modular Design

  • Main board integrates ESP32-S3, PN532, MAX98357, LEDs, and SD card slot
    
  • External NFC antenna board with connector for optimal placement
    
  • 3 W speaker for high-quality audio output
    
  • NTAG215 NFC card included

Package Contents

• Main module PCB (ESP32-S3 + PN532 + MAX98357 + 8 × WS2812B LEDs + MicroSD slot)
• External NFC antenna PCB with cable connector
• 3 W speaker
• NTAG215 NFC card

Specifications

NFC Capabilities

The PN5321 supports multiple operating modes at 13.56 MHz:

• ISO/IEC 14443A/MIFARE Reader/Writer: MIFARE Classic (1K/4K), MIFARE Ultralight, NTAG series, DESFire.
  
• FeliCa Reader/Writer: Sony FeliCa cards.
  
• ISO/IEC 14443B Reader/Writer: Type B tags.
  
• ISO/IEC 14443A/MIFARE Card Emulation: Emulate MIFARE Classic 1K or 4K cards.
  
• FeliCa Card Emulation: Emulate FeliCa cards.
  
• ISO/IEC 18092 (ECMA-340) Peer-to-Peer: NFC peer-to-peer communication.

Emulation and peer-to-peer modes enable advanced use cases such as virtual card creation and direct device-to-device exchanges.

ESP32-S3 Integration

Refer to the Pinout and Internal Connections section for detailed GPIO mappings.

• Use Cases

  • NFC-triggered audio playback, LED animations, and Wi-Fi/BLE interactions.
    
  • Access control systems with visual/audio feedback.
    
  • Interactive installations, smart kiosks, educational projects.

• Software & Code Examples
  Leverage frameworks such as Arduino, ESP-IDF, MicroPython, and ESPHome. PN532 libraries are widely available for these environments.

Quick Start

1. Power
   Supply power via USB-C or 5 V through the onboard connector.

2. Example Loaded
   On startup, the example firmware is ready to read NFC tags and perform the following behavior:

   • LEDs: Continuous "chase" effect on the 8 WS2812B LEDs.
     
   • On Tag Detect: Play success.mp3 from the MicroSD card (SD card not included) and flash the LEDs in green.

Order Processing

We process all orders within 1–2 business days of receiving payment. During national holidays or peak periods, processing may take up to 3 business days.

Shipping Origin

All packages ship from A Coruña, Spain, via Correos.

Delivery Methods & Estimated Times

• Spain (peninsula): 2–5 business days

• Balearic Islands, Ceuta & Melilla: 3–7 business days

• Europe (rest of EU): 7–15 business days

• Rest of World: 10–30 business days (varies by destination country)

Shipping Costs

Shipping fees are calculated at checkout based on package weight, dimensions, and destination. You’ll see the exact cost before you confirm payment.

Tracking

Every order includes a Correos tracking number. As soon as your package is handed over to the carrier, we’ll email you the tracking code so you can follow its progress.

Customs & Import Taxes

For destinations outside the European Union, customs duties, VAT, or other import fees may apply. These charges are not included in our shipping fees and are the responsibility of the buyer.

Address Changes

If you need to change your shipping address, please contact us before you receive your tracking number. Once the package is in transit, Correos’s address‐change policies and fees will apply.

Delays & Claims

If your package is delayed beyond the estimated delivery window, marked “Delivered” but not received, or arrives damaged, please contact us immediately. We will work with Correos to locate your shipment or arrange a replacement as needed.

Customer Support

For any questions about shipping, email us at info@hermitx.es or use the contact form on our site. We’re here to help!