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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
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
| Feature | N8900U MP3 Bluetooth Module | Typical Bluetooth Modules |
|---|---|---|
| Bluetooth Version | Bluetooth 5.0 | Often Bluetooth 4.0 / 2.1 |
| Audio Decode | MP3 + WAV hardware decoding (DSP) | MP3 only or software-based decoding |
| CPU Architecture | 32-bit CPU + DSP | 8-bit MCU or general-purpose CPU |
| Stereo Output Quality | 16-bit DAC, SNR > 90dB | 12–14-bit DAC, lower SNR (70–85dB) |
| Storage Support | TF card, USB drive, Flash memory | Usually none or just TF card |
| File System Support | FAT16 / FAT32 | Often limited FAT16 only or proprietary formats |
| Control Interface | UART, one-wire serial, ADKEY | Mostly UART only, no ADKEY support |
| Volume / EQ Control | 30 levels, 5 EQ presets | Fixed or minimal control (e.g., 10 steps, no EQ) |
| Playback Control Features | Supports playlist navigation, file/folder targeting | Basic play/pause/next/prev only |
| BUSY Signal Output | Yes (dedicated BUSY output pin) | Rarely available |
| Additional Functions | FM, voice recording, USB update, playback modes, IR input | Typically no FM, recording, or USB OTG |
| Application Readiness | Designed for voice prompts & embedded devices | Mostly for wireless speakers or simple audio systems |
| Power Supply Range | Flexible and stable (3.3V–5V) | 3.3V fixed, sometimes unstable |
| Customization Support | Yes – API available, deep custom firmware supported | Often closed system, not customizable |
| Target Use Cases | Smart locks, medical devices, toys, appliances, IoT voice alerts | Wireless 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
| Industry | Custom Features Example |
|---|---|
| Smart Locks | Fingerprint match → play voice → send BUSY signal |
| Medical Devices | Track-specific alerts (“BP too high”) in English/Spanish |
| Toys/Gifts | Preloaded songs or stories, trigger via ADKEY |
| Massagers | Mode switch → voice confirmation + EQ change |
| Access Control | Custom 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 Type | ADKEY Use Examples |
|---|---|
| Smart locks | Lock/Unlock, Mode switch, Voice toggle |
| Medical devices | Start test, Repeat instruction, Mute |
| Toys & MP3 players | Play, Pause, Next song, EQ |
| Gift boxes | Trigger voice/music from 1 key |
