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Mp3 Bluetooth Module

Looking for a high-performance, all-in-one MP3 Bluetooth module? The N8900U combines Bluetooth 5.0, MP3/WAV decoding, TF/USB/Flash support, and recording/FM functions into one compact chip. With 32-bit CPU + DSP hardware decoding and stereo DAC output, it delivers crystal-clear sound, stable control, and effortless integration. Ideal for voice prompts, smart devices, and embedded systems.

Smart MP3 Bluetooth Module for Embedded Audio Perfection

N8900U Mp3 Bluetooth module

The N8900U – A Next-Gen MP3 Bluetooth Module

Say goodbye to complex audio systems. The N8900U MP3 Bluetooth module offers a powerful integration of Bluetooth 5.0, MP3/WAV playback, FM radio, recording, and multi-device storage in a single compact chip. It’s tailor-made for modern voice-controlled smart electronics, delivering exceptional sound quality, effortless control, and robust performance for any embedded application.

Rich Features, Streamlined Functionality

  • Bluetooth V5.0 + USB2.0 OTG + FAT16/32 storage support (TF card, flash, U-disk)
  • 32-bit CPU + DSP hardware decode for MP3/WAV formats
  • 16-bit stereo DAC output, SNR > 90dB
  • 30-level volume control, 5-band EQ adjustment
  • ADKEY, UART, and single-wire serial control
  • Supports playback mode switching, track index reading, directory management
  • Dedicated BUSY signal output for precise system status
  • Ultra-compatible with MCU-controlled applications

Smart low-cost solution with customization support

Custom-Ready, Cost-Effective, Compact

Whether you’re building a blood pressure monitor, smart lock, barcode scanner, or voice toy, the N8900U delivers exactly what your product needs:

  • Low power, compact form factor
  • Plug-and-play audio playback with no low-level coding
  • Supports recording, voice prompts, and even wireless audio
  • Compatible with high-interference environments
  • Flexible control modes to suit any microcontroller-based system

Power Your Product with N8900U Today

Simplify your audio system design and upgrade your product experience with the N8900U MP3 Bluetooth module. It’s your all-in-one solution for stable, customizable, high-quality embedded audio.

👉 Contact us today to request a sample or discuss integration for your next device.

FAQ

Can you compare it to other Bluetooth modules?

Absolutely. Below is a clear, feature-by-feature comparison of the N8900U MP3 Bluetooth module vs. typical Bluetooth audio modules found in the market (like BK8000L, JDY-62, and generic CSR-based chips):

N8900U MP3 Bluetooth Module vs. Common Competitor Modules

FeatureN8900U MP3 Bluetooth ModuleTypical Bluetooth Modules
Bluetooth VersionBluetooth 5.0Often Bluetooth 4.0 / 2.1
Audio DecodeMP3 + WAV hardware decoding (DSP)MP3 only or software-based decoding
CPU Architecture32-bit CPU + DSP8-bit MCU or general-purpose CPU
Stereo Output Quality16-bit DAC, SNR > 90dB12–14-bit DAC, lower SNR (70–85dB)
Storage SupportTF card, USB drive, Flash memoryUsually none or just TF card
File System SupportFAT16 / FAT32Often limited FAT16 only or proprietary formats
Control InterfaceUART, one-wire serial, ADKEYMostly UART only, no ADKEY support
Volume / EQ Control30 levels, 5 EQ presetsFixed or minimal control (e.g., 10 steps, no EQ)
Playback Control FeaturesSupports playlist navigation, file/folder targetingBasic play/pause/next/prev only
BUSY Signal OutputYes (dedicated BUSY output pin)Rarely available
Additional FunctionsFM, voice recording, USB update, playback modes, IR inputTypically no FM, recording, or USB OTG
Application ReadinessDesigned for voice prompts & embedded devicesMostly for wireless speakers or simple audio systems
Power Supply RangeFlexible and stable (3.3V–5V)3.3V fixed, sometimes unstable
Customization SupportYes – API available, deep custom firmware supportedOften closed system, not customizable
Target Use CasesSmart locks, medical devices, toys, appliances, IoT voice alertsWireless music, car kits, basic audio output

Why N8900U Stands Out:

  • Combines Bluetooth + MP3/WAV decoding + storage + FM + recording

  • Offers multiple control modes (UART, ADKEY, 1-wire serial)

  • Designed for real embedded audio control, not just Bluetooth music

  • High SNR (90dB) ensures crystal-clear sound, even in voice prompts

  • Modular and customizable, fitting perfectly into industrial, medical, consumer, and smart home devices

Can you detail customization options available?

he N8900U MP3 Bluetooth module offers a range of customization options to help developers and manufacturers tailor the module to specific product needs across various industries. Below is a detailed breakdown:

Firmware Customization

  • Custom voice playback logic: Choose how and when voice prompts trigger—ideal for smart locks, appliances, or medical devices.
  • Customized UART command set: Simplify or modify commands for faster integration with your MCU or PLC.
  • Playback modes: Modify default behavior (e.g., auto-play on power-up, loop mode, random mode).
  • Startup and standby behavior: Configure sleep modes, wake behavior, or delay intervals.

Audio Content Integration

  • Preloaded audio: Factory pre-burn your product-specific MP3/WAV voice prompts to onboard Flash or TF card.
  • Path-specific voice folders: Organize playback by folder structure and assign command-based triggers.

  • Multi-language support: Support for folder naming and playback in Chinese, English, and other language paths.

Hardware I/O Configuration

  • ADKEY resistance mapping: Customize resistor values and button mappings to fit your keypad layout.
  • GPIO usage: Reassign BUSY, mute, play, or other functions to specific pins.
  • IR receiver customization: Adapt to specific IR remote models or protocols if using remote control input.

Voice & Audio Features

  • Custom EQ profiles: Tailor the 5-band EQ to match your speaker, enclosure, or use case.
  • Mic/recording behavior: Set recording format, duration, gain levels, and where files are saved.
  • Dynamic voice insertion rules: Configure when and how voice interruptions occur (e.g., emergency alert over background music).

Packaging & Labeling

  • Private label options: Add your company logo or branding on module packaging.
  • Custom module ID or versioning: Useful for product differentiation, inventory tracking, or software matching.

SDK & API Access

  • API documentation: For UART command integration and advanced control.
  • Development tools support: Assist with testing/debugging on various MCU platforms.
  • Consultation for feature expansion: Collaborate with firmware engineers to build in unique product capabilities.

Popular Customization Use Cases

IndustryCustom Features Example
Smart LocksFingerprint match → play voice → send BUSY signal
Medical DevicesTrack-specific alerts (“BP too high”) in English/Spanish
Toys/GiftsPreloaded songs or stories, trigger via ADKEY
MassagersMode switch → voice confirmation + EQ change
Access ControlCustom ID callout via 1-wire UART signal

What industries best fit this module’s use?

The N8900U MP3 Bluetooth module is a versatile, embedded audio solution that fits a wide range of industries—especially those needing compact, voice-enabled, Bluetooth-integrated functionality. Here’s a breakdown of the top industries and ideal use cases:

Medical & Healthcare Devices

Why it fits:

  • Stable voice playback for prompts and instructions

  • Supports Bluetooth 5.0 for wireless data/audio

  • Clear stereo sound (SNR > 90dB)

Use cases:

  • Blood pressure monitors

  • Blood glucose meters

  • Medical alert systems

  • Smart thermometers

  • Hospital access systems

Smart Home & Security

Why it fits:

  • Low power + deep customization

  • ADKEY or 1-wire UART for easy control

  • Compact size for tight enclosures

Use cases:

  • Smart locks (fingerprint, password, card-based)

  • Doorbell voice prompts

  • Access control systems

  • Smart door/window sensors

Consumer Electronics & Toys

Why it fits:

  • Pre-recorded voice playback

  • Custom folder-based playback

  • Supports TF/USB for story/music storage

Use cases:

  • Educational toys

  • Voice storybooks

  • Portable MP3 players

  • Game consoles with voice feedback

  • DIY kits and STEM products

Automotive & Vehicle Accessories

Why it fits:

  • Stereo output + BUSY signal for system sync

  • Works in high-interference environments

Use cases:

  • Parking alert systems

  • Voice-guided navigation or assistance

  • Bluetooth-connected driving tools

  • Car diagnostic tools with audio alerts

Industrial & Commercial Equipment

Why it fits:

  • Supports voice alarms and instructions

  • Easy integration with existing MCUs

Use cases:

  • Barcode scanners

  • Kiosks and vending machines

  • Factory automation systems

  • Industrial control panels with voice feedback

Religious & Cultural Devices

Why it fits:

  • Folder-based audio control

  • Custom playback by button or sensor

Use cases:

  • Digital chanting machines (Buddhist/Christian/Islamic)

  • Mantra/nianfo players

  • Interactive ceremonial tools

Crafts, Gifts, and Novelty Products

Why it fits:

  • Preloaded voice or music

  • Battery-compatible

  • Small form factor

Use cases:

  • Gift boxes with voice

  • Greeting cards with sound

  • Personalized promotional items

Please Explain the ADKEY control’s advantages

The ADKEY control mode used in the N8900U MP3 Bluetooth module offers smart, cost-effective, and space-saving advantages over traditional control methods. Here’s a clear explanation:

What is ADKEY Control?

ADKEY (Analog Key) control is a method where multiple buttons are connected to a single ADC (analog-to-digital converter) input using different resistor values. When a button is pressed, it outputs a unique voltage level that the MCU or module recognizes as a specific command.

Advantages of ADKEY Control

Saves I/O Pins
  • Traditional matrix keyboards require multiple GPIO pins.

  • ADKEY uses just one analog input pin to support up to 10 buttons.

  • Ideal for compact devices or MCUs with limited GPIOs.

Reduces Hardware Complexity
  • No need for complex key matrix wiring or scanning code.

  • Simpler PCB layout and reduced wiring.

Lower Cost
  • Fewer pins = smaller microcontrollers = lower BOM cost.

  • Reduces connector, PCB, and assembly cost.

Efficient for Embedded Design
  • Works perfectly in battery-powered, space-constrained, or low-resource devices.

  • Highly compatible with embedded MP3/Bluetooth modules like N8900U.

Flexible Customization
  • Resistor values can be defined by the developer to match their key design.

  • Developers can map each voltage to custom functions (e.g., Play, Pause, EQ, Volume+, Folder Next).

Stable & Reliable
  • Less vulnerable to signal interference compared to traditional matrix scanning.

  • Works well even in high EMI environments (when paired with proper filtering).

Real-World Applications
Product TypeADKEY Use Examples
Smart locksLock/Unlock, Mode switch, Voice toggle
Medical devicesStart test, Repeat instruction, Mute
Toys & MP3 playersPlay, Pause, Next song, EQ
Gift boxesTrigger voice/music from 1 key
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