How to Use Module Ampli audio Mp3 I2S: Examples, Pinouts, and Specs

The Module Ampli Audio MP3 I2S (Manufacturer Part ID: DFR0954) by DFRobot is a compact and efficient audio amplifier module designed for MP3 playback. It utilizes the I2S (Inter-IC Sound) interface for digital audio transmission, ensuring high-quality sound output with minimal noise and distortion. This module is ideal for applications requiring clear and amplified audio, such as smart speakers, DIY audio systems, and embedded audio projects.

• DIY audio systems and portable speakers
• Smart home devices with audio playback
• Embedded systems requiring high-quality sound
• Educational projects involving digital audio processing
• Prototyping audio-based IoT devices

Below are the key technical details and pin configuration for the DFR0954 module:

The DFR0954 module has a total of 7 pins. The table below describes each pin:

1. Power the Module: Connect the VIN pin to a 3.3V power source and the GND pin to ground.
2. Connect I2S Signals:
   • Connect the LRCK, BCLK, and DIN pins to the corresponding I2S output pins of your microcontroller or audio source.
3. Connect Audio Outputs:
   • Attach the ROUT and LOUT pins to speakers or an external amplifier for stereo audio output.
4. Load Audio Data: Ensure your microcontroller or audio source is configured to send audio data in a supported format (e.g., MP3, WAV).
5. Test the Setup: Power on the system and verify audio playback.

• Power Supply: Ensure a stable 3.3V power supply to avoid noise or distortion in the audio output.
• Speaker Impedance: Use speakers with an impedance of 4Ω or higher for optimal performance.
• I2S Configuration: Configure your microcontroller's I2S interface to match the module's requirements (e.g., bit depth, sampling rate).
• Heat Dissipation: Although the module is efficient, ensure proper ventilation if used in high-power applications.

The DFR0954 module can be connected to an Arduino UNO using an external I2S interface module (since the UNO does not natively support I2S). Below is an example code snippet for an Arduino-compatible microcontroller with I2S support (e.g., ESP32):

#include <I2S.h> // Include the I2S library for audio communication

void setup() {
  // Initialize I2S with the appropriate pins
  if (!I2S.begin(I2S_PHILIPS_MODE, 44100, 16)) {
    // Check if I2S initialization was successful
    Serial.println("Failed to initialize I2S!");
    while (1); // Halt execution if initialization fails
  }

  Serial.println("I2S initialized successfully!");
}

void loop() {
  // Example: Send audio data to the I2S module
  int16_t sample = 0; // Placeholder for audio sample
  I2S.write((uint8_t *)&sample, sizeof(sample)); 
  // Write audio data to the I2S interface
}

• Replace the placeholder sample with actual audio data from your source.
• Ensure the I2S pins on your microcontroller are correctly connected to the DFR0954 module.

1. Can I use a 5V power supply for the module?
   No, the module is designed to operate at 3.3V. Using a 5V supply may damage the module.

2. What is the maximum sampling rate supported by the module?
   The module supports sampling rates up to 48kHz for high-quality audio playback.

3. Can I use this module with a Raspberry Pi?
   Yes, the Raspberry Pi has native I2S support and can interface with the module for audio playback.

4. Is the module compatible with mono audio output?
   Yes, you can use either the ROUT or LOUT pin for mono output, but stereo output is recommended for optimal performance.

5. What is the recommended speaker wattage?
   Use speakers with a power rating of 3W or higher to match the module's output power.

By following this documentation, you can effectively integrate the DFR0954 Module Ampli Audio MP3 I2S into your audio projects and achieve high-quality sound amplification.