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Small green PCB with memory card slot and pin headers

NuoTo

NuoTo MP3 Player Module UART TTL Serial Control Board

SKU CH-X0WG-KQVYS

UART TTL serial board plays MP3 and WAV files from a memory card with 30 volume levels at 9600 baud

  • Plays MP3 and WAV files for flexible audio projects
  • 30-level volume control lets you set precise listening levels
  • UART TTL serial interface at 9600 baud enables simple microcontroller integration
  • Works with 3.3 V and 5 V logic for broad board compatibility
  • On-board memory card socket allows quick media swaps without rewiring

UART TTL MP3 Module for Microcontrollers

This compact PCB provides a serial-controlled audio player that works with 3.3V and 5V logic levels. It accepts commands over UART at 9600 baud to manage playback, volume and track selection. The board is aimed at hobbyists and developers adding sound to embedded projects.

On-Board Card Socket and Voltage Flexibility

A built-in memory card socket lets you store MP3 or WAV files directly on the module without external storage wiring. The control interface tolerates both 3.3V and 5V TTL signals, so it can connect straight to a Leonardo, Due or similar microcontroller. Its small footprint and light weight make mounting inside tight enclosures straightforward.

30-Level Volume and Dual Format Support

Playback software on the module handles MP3 and WAV files and offers 30 discrete volume steps adjustable through serial commands. No extra libraries or host-side decoding are required; the board renders audio independently once powered and instructed. This reduces code complexity for DIY builders who need reliable sound output.

How it compares

Measured against everything we stock in Mini PC Barebone Systems, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 99% of the 1,735 comparable items (median $564.99).

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Specifications

Processor
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Questions about this item

What UART baud rate does the NuoTo MP3 player module use for serial control?

The module communicates at 9600 bps over its UART TTL serial interface for play mode, volume, and track commands.

What logic voltages can the module's control interface accept?

The control logic interface works with both 3.3 V and 5 V TTL levels, so it can connect directly to boards like Leonardo or Due.

How is the audio storage connected to the board?

Insert a memory card into the on-board socket; the module reads MP3 and WAV files directly from that card.

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