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Product description: AudioPlayer - MP3 / WAV audio player - N9301 - Unit expansion module - M5Stack U197
The Unit AudioPlayer module from M5Stack is a universal audio player designed with simplicity of integration and high sound quality in mind. The N9301 decoder allows for seamless playback of MP3 and WAV files from a microSD card , and communication is via a UART interface at a default speed of 9600 bps. Audio output is available via a classic 3.5 mm jack , making it easy to connect to headphones or amplifiers. The device is suitable for intelligent voice control systems as well as industrial, educational, and medical solutions requiring fast and reliable voice messaging.
AudioPlayer - MP3 / WAV audio player - N9301 - Unit expansion module - M5Stack U197.
AudioPlayer is an MP3 player equipped with the N9301 audio decoding chip.
Main features of the AudioPlayer module
- Built-in N9301 audio decoder : supports MP3 and WAV file playback
- UART communication : default 9600 bps, compliant with 8N1 format
- microSD slot : supports cards up to 32 GB and FAT16/FAT32 systems
- 3.5mm audio jack : allows you to conveniently connect external speakers or headphones
- Compact size : only 48 x 24 x 8 mm and weighing 6.9 g
Pinouts and compatibility with M5Stack
The Unit AudioPlayer module features a standard Grove connector and communicates via UART . It easily connects to M5Stack devices such as CoreS3 , Core2 , and Atom . Standard Grove ports A, B, and C are compatible, but require customization of the program code to the assigned pins (e.g., G17/G18 on CoreS3). The wire color scheme is black (GND), red (5V), yellow (UART_RX), and white (UART_TX). This allows the module to seamlessly integrate into the M5Stack ecosystem and enable the creation of scalable projects.
You can control MP3 playback from a microSD card via the UART interface.
Programming and ecosystem integration
Unit AudioPlayer supports three major platforms: Arduino IDE, UiFlow1, and UiFlow2 . Ready-made libraries and documentation allow you to quickly integrate the module into your project—from simple voice prompts to dynamic content playback systems. Available code examples and official UART protocols make it easy to get started. The module is ideal for IoT projects, educational electronics learning kits, and automated voice messaging systems.
AudioPlayer Unit Technical Specifications
- Audio chip: N9301
- Memory interface: microSD card slot
- Supported formats: MP3, WAV
- File systems: FAT16 / FAT32
- Communication: UART, 9600 bps, 8N1
- Audio connector: 3.5 mm jack (stereo)
- Power supply: 5V DC
- Current consumption (operation): 25.17 mA
- Current consumption (standby): 7.33 mA
- Power consumption (sleep): 871.24 µA
- Dimensions: 48 x 24 x 8 mm
- Weight: 6.9 g
Contents of the set
- 1x Unit Audio Player
- 1x Grove Cable (20cm)
A Grove cable is included in the set.
