ESP32-C3 NFC Music Box | Audio Reactive WS2812 | Auto Learning + Manual UID | Kids Smart Audio Player

mart NFC music box for kids with reactive LEDs and customizable design.

🧸 Full Description

Smart NFC Audio Player for Kids

This TonyBox is a DIY smart audio player based on ESP32-C3.
When an NFC tag is detected, the device automatically plays the assigned MP3 folder.

The project is designed to be:

• beginner-friendly

• highly reliable

• fully customizable

• perfect for kids

⭐ Key Features

✅ NFC tag playback (PN532 I2C)
✅ MP3 playback from microSD (DFPlayer Mini)
✅ WS2812 audio-reactive LEDs (16 led)
✅ Physical control buttons
✅ Smart anti-repeat shuffle
✅ Two firmware options included
✅ Optional 18650 battery support
✅ USB-C powered
✅ Front and back images fully customizable
✅ Embedded NFC tag print-pause system

🖨 IMPORTANT — Embedded NFC Tag During Print

The 3D model includes a print pause that allows you to embed the NFC tag inside the object.

How it works

1. Start the print normally

2. The printer pauses automatically

3. Insert the NFC tag into the pocket

4. Resume printing

✅ Clean professional look
✅ Child-safe design
✅ No glue required

📸 Reference images show exactly where to pause.

🖼 Full Customization

The TonyBox is fully customizable.

You can easily change:

• 🎨 front image

• 🖼 back image

• 🏷 NFC tag graphics

• 🌈 LED effects

• 🔊 audio content

✅ Both front and back panels can be reprinted with your own design.

Perfect for:

• kids characters

• audiobooks

• personalized gifts

• educational projects

🧠 Firmware Options

🔵 Manual UID (Recommended)

Pros

• unlimited NFC tags

• maximum stability

• full control

Cons

• requires UID scanning step

🟢 Auto Learning

Pros

• very easy to use

• automatic tag learning

Limitations

• maximum 5 tags

• 6th tag overwrites the oldest

• PLAY button becomes LEARN

⚠ These are two separate sketches.

🔘 Button Functions

Manual UID

• ▶ PLAY → play / pause

• ⏭ NEXT → next random track

• ⏮ PREV single → restart track

• ⏮ PREV double → previous track

Auto Learning

• ▶ becomes LEARN

• ⏭ NEXT active

• ⏮ PREV active

🔀 Smart Anti-Repeat System

The TonyBox:

• shuffles tracks

• avoids immediate repetition

• automatically regenerates the playlist

⚡ Recommended Power

• 5V 2A minimum

• 5V 3A recommended

Avoid weak USB ports.