Introduction
The voice prompt module integrates an intelligent MP3 music playback chip with a speaker. Designed for ease of use, it can operate directly with a power supply, battery, and buttons, or be controlled via serial commands. Featuring seamless MP3, WAV, and WMA hardware decoding, this module boasts a 16MB memory capacity, enabling easy playback of specified tracks and sequences through simple serial commands. Its user-friendly design, wide applicability, good sound quality, and reliable performance make it superior to previous MP3 player and speaker solutions.
Size
Pin definition
| No | Pin | Description | Note |
|---|---|---|---|
| 1 | 5V | Input Voltage | Input voltage should not exceed 5.2V |
| 2 | U+ | USB+ DP | USB Port |
| 3 | U- | USB- DM | USB Port |
| 4 | GND | GND | Power GND |
| 5 | TX | UART serial output | If connecting to a 5V TTL, a resistor should be connected in series |
| 6 | RX | UART serial input | If connecting to a 5V TTL, a resistor should be connected in series |
| 7 | Busy | Playing Status | Low means playing \high means no |
| 8 | P1 | 1-channel digital input interface | Ground-triggered function 1. Short press: Next track 2. Double press: Previous track 3. Long press: Pause/Play |
Arduino tutorial
Requirements
- Hardware
- DFRduino UNO R3 (or similar) x 1
- MP3 Voice prompter x1
- Software
- Arduino IDE
- Download and install the DFRobot_SerialMP3 library
- How to install the library?
Wiring diagram
Sample code (sample codes are provided by the library files)
- Connect the module to the UNO controller according to the wiring diagram above. Of course, you can also use an expansion board for a more convenient and quicker prototype construction.
- Download and install the DFRobot_SerialMP3 library.
- Open the Arduino IDE, upload the following code to the UNO controller.
- Open the serial monitor of the Arduino IDE, adjust the baud rate to 115200, and observe the serial print results.