JQ6500 5-Way Serial Control Voice Module – MP3 Playback IC with MCU UART Interface for Custom Audio Broadcasting

SKU: FA2044-1
Operating Voltage

3.2V – 5V DC
Serial Interface

Standard UART (TTL Level)
Baud Rate

9600 bps (Default)
Audio Formats

MP3 (8~320Kbps), WAV
Output Power

2W (into 8Ω load)
Internal Storage

16Mbit SPI Flash (Approx. 2MB)
Quiescent Current

< 10mA (Standby)
Operating Temp

-40°C to +85°C (Industrial Grade)
Product Description
The JQ6500 5-Way Serial Voice Module is a high-performance, multipurpose audio solution designed for professional-grade voice broadcasting and MP3 playback. Unlike simpler recording chips, the JQ6500 supports high-quality MP3 and WAV decoding, offering superior sound fidelity for industrial alerts, commercial kiosks, and smart appliances.
This module is uniquely versatile, offering two primary control methods: 5-Way Direct Trigger (for standalone use with physical buttons) and Full Serial UART Control (for integration with Arduino, Raspberry Pi, or PLCs). With its onboard flash memory, users can easily upload custom audio files via a standard USB connection. Its “Plug-and-Play” architecture allows for complex audio sequencing, volume adjustment, and track selection, making it the definitive choice for developers requiring a reliable, programmable voice interface.
Key Features
  • Dual Control Modes: Supports 5-way direct I/O mapping for simple button triggers or full UART serial command control for advanced MCU integration.
  • High-Fidelity Decoding: Hardware decoding for MP3 and WAV formats with support for sampling rates from 8KHz to 44.1KHz.
  • Onboard Flash Storage: Includes integrated SPI Flash memory (typically 16Mbit/2MB) for storing high-quality voice prompts without an SD card.
  • USB File Management: Easily update audio content by connecting the module directly to a PC; it appears as a standard drive for quick file transfers.
  • Rich Serial Command Set: Control play/pause, volume (30 levels), next/previous track, and specific file indexing via simple hex commands.
  • Direct Speaker Drive: Integrated 2W mono amplifier capable of driving a small speaker directly, or line-out for external amplification.
Usage & Applications
  • Industrial Safety Broadcasting: Automate voice warnings for factory machinery (“Caution: Machine Starting”) triggered by PLC sensors.
  • Public Address Systems: Use in elevators, vending machines, or ticketing kiosks to provide step-by-step user guidance.
  • Smart Home Integration: Connect to an ESP32 or Arduino to play custom door chimes, weather reports, or security system status alerts.
  • Automotive Electronics: Voice prompts for vehicle reverse-assist sensors or GPS navigation turn-by-turn directions.
  • Medical Equipment: Clear audible instructions and status updates for diagnostic or treatment hardware.
Q: Do I need a microSD card to use the JQ6500 module?

No. This specific version includes onboard SPI Flash memory. You simply connect the module to your computer via USB and upload your MP3 files directly to the module’s internal storage

Q: Can I trigger multiple sounds at once?

The module is designed for single-track playback. When a new trigger is received, it will typically stop the current track and start the new one, or wait for the current track to finish depending on your configuration.

Q: Is the 5-way trigger mode customizable?

Yes. The 5 pins (K1–K5) can be mapped to specific audio files. When a pin is pulled to Ground, the corresponding file plays instantly, making it perfect for simple button-operated soundboards

Q: How do I change the volume via code?

Using the UART interface, you can send specific Hex commands (e.g., 7E 03 06 1E EF for max volume) to adjust the output across 30 distinct levels.

Q: Will it work with my 5V Arduino Uno?

Yes. The JQ6500 is 5V tolerant. However, when connecting the UART TX/RX pins, we recommend a 1kΩ resistor on the RX line of the module to ensure long-term stability with 5V logic signals

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