MP3 Player Module | ATMOSFÆR ENGINEERING

Compact audio playback module supporting MP3, WAV, and WMA formats with onboard 24-bit DAC for high-quality sound output. Features multiple control modes (serial UART, I/O trigger, AD button) and supports microSD cards up to 32GB. Perfect for embedded audio projects, voice prompts, alarm systems, and Arduino/ESP32 audio applications without requiring external decoding.

Technical Specifications:

• Supported Formats: MP3, WAV, WMA
• File Systems: FAT16, FAT32
• Storage: MicroSD card (up to 32GB), USB flash drive (up to 32GB), 64MB NOR Flash
• DAC: 24-bit
• Dynamic Range: 90dB
• Signal-to-Noise Ratio: 85dB
• Sampling Rates: 8/11.025/12/16/22.05/24/32/44.1/48 kHz
• Operating Voltage: 3.3V - 5V (5V recommended, max 5.2V)
• Interface: 16-pin header (UART, I/O control, AD button)
• Volume Levels: 30 adjustable levels
• EQ Settings: 6 presets (Normal, Pop, Rock, Jazz, Classic, Bass)
• File Organization: Up to 100 folders, 255 tracks per folder
• Audio Output: 3.5mm jack, speaker terminals (direct drive up to 3W)
• Dimensions: 20.65mm x 20.45mm x 1.6mm
• Operating Temperature: -40°C to +85°C (typical)

Control Modes:

• Serial UART: Full control via microcontroller (Arduino, ESP32, etc.)
• I/O Trigger: Direct playback trigger via GPIO pins
• AD Button: Analog button control for standalone operation

Pin Configuration:

• VCC, GND: Power supply
• TX, RX: Serial communication
• SPK1, SPK2: Speaker output (3W max)
• DACR, DACL: Line-level audio output
• ADKEY1, ADKEY2: Analog button input
• USB+, USB-: USB drive connection
• IO1, IO2: Trigger/busy status pins

Applications:

• Voice prompt systems (navigation, announcements, alarms)
• Embedded audio playback for IoT devices
• Interactive exhibits and displays
• Doorbell and notification sounds
• Audio triggers for automation systems
• Educational electronics projects
• Retail and transportation voice guidance
• Safety and security alarm systems

Compatible with Arduino, ESP32, Raspberry Pi, and any microcontroller with UART or GPIO. Includes onboard amplifier for direct speaker connection or line-level output for external amplifiers.