Description

Audio Player Unit is a compact MP3 and WAV playback module for embedded M5Stack projects. It uses the N9301 audio decoding chip, includes a microSD card slot, and outputs sound through a 3.5mm stereo jack for clear audio playback.

Playback can be controlled through the Grove UART interface with serial commands, making the Audio Player Unit easy to integrate into controllers, automation panels, guided voice systems, and interactive learning devices. The module supports FAT16 and FAT32 file systems and microSD cards up to 32GB.

For smart home controllers, voice tour guides, industrial alarm systems, medical voice prompt terminals, and STEAM education kits, the Audio Player Unit provides a small, serial-triggered audio solution that is practical for miniaturized and space-constrained builds.

Notes

Insert the microSD card before powering on the Audio Player Unit. If the card is inserted after power-on, initialization may fail.

Features

• Audio Player Unit design: compact audio playback module with the N9301 decoding chip.
• UART control: playback can be triggered through Grove serial communication.
• Audio output: standard 3.5mm stereo jack for direct audio connection.
• Format support: supports MP3 and WAV audio files.
• Storage support: compatible with FAT16/FAT32 file systems and microSD cards up to 32GB.
• Development support: usable with UiFlow1, UiFlow2, and Arduino IDE workflows.

Specifications

Applications

• Audio Player Unit integration for smart voice interaction devices and smart home control centers.
• Voice tour guides, guided exhibits, and interactive signage.
• Industrial automation alarm systems and equipment status prompts.
• Medical device voice prompt terminals.
• STEAM education and embedded audio teaching projects.

Product List

• 1 x Unit AudioPlayer
• 1 x HY2.0-4P Grove connection cable (20cm)

Other Content

The Audio Player Unit uses PORT.C pin mapping: Black for GND, Red for 5V, Yellow for UART_RX, and White for UART_TX. This helps keep wiring predictable when the module is connected to a host controller.

Use the protocol PDF when implementing serial playback commands, and check the schematic and model size files before placing the unit inside a fixed enclosure.

Resources

Unit AudioPlayer product document

Unit AudioPlayer schematic PDF

Unit AudioPlayer model size PDF

Unit AudioPlayer Arduino tutorial

Unit AudioPlayer Arduino library

Unit AudioPlayer UiFlow2 documentation

Unit AudioPlayer UART protocol PDF

FAQ

What audio formats are supported?

The module supports MP3 and WAV audio files.

How is playback controlled?

Playback is controlled through UART serial communication over the Grove interface.

What storage card can be used?

Use a microSD card up to 32GB with a FAT16 or FAT32 file system.

What should be done before power-on?

Insert the microSD card before powering on the Audio Player Unit so initialization can complete normally.