Example Code for Arduino-Playback

Hardware Preparation

• DFR0216 DFRduino UNO R3 x 1
• DFR0781 Audio & BLE/SPP Pass-through Module x 1
• FIT0449 Speaker with Amplifier x 1
• FIT0916-FF DuPont Wires x4

Software Preparation

• Download Arduino IDE: Click to download Arduino IDE
• Download the DFRobot_BT401 library: DFRobot_BT401 library
• About how to install the library?

Wiring Diagram

Other Preparation Work

It is recommended to use hardware serial to drive this module, since it may be unstable when using software serial, which may result in unknown errors.It is suggested to reduce the module's baud rate to 9600 when using software serial driver. Delay 2s for the BT401 to start before initializing.

Sample Code

/*!
 * @file playMusic.ino.ino
 * @brief Play song in TF card 
 * @n Experiment Phenomenon：play music and do the related actions 
 * @copyright  Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @licence     The MIT License (MIT)
 * @author [Eddard]([email protected])
 * @version  V1.0
 * @date  2020-12-29
 * @get from https://www.dfrobot.com
 * @url https://github.com/cdjq/DFRobot_ID809
*/

#include <DFRobot_BT401.h>
#include <SoftwareSerial.h>

SoftwareSerial btSerial(2, 3);  //RX TX

DFRobot_BT401 bt;

void setup(){
  btSerial.begin(115200);
  /*Delay 2s for the BT401 to start*/
  delay(2000);
  while(!bt.begin(btSerial)){
    Serial.println("Init failed, please check wire connection!");
    delay(1000);
  }
  bt.setVOl(30);
  bt.switchFunction(bt.eTFCard);
  bt.setPlayMode(bt.eDeviceCycle);
}

void loop(){
  //Play
  bt.playControl(bt.ePlay);
  delay(3000);
  //Pause 
  bt.playControl(bt.ePause);
  delay(3000);
  //Next 
  bt.next();
  delay(3000);
  //Last 
  bt.last();
  delay(3000);
  //Play song in the first file
  bt.playFileNum(1);
  while(1);
  /*Delete the currently playing file*/
  //bt.delCurFile();
}

Result

The module will enter music mode on power-up, play the last recorded file, pause after 3 seconds, play the next song after another 3 seconds, play the previous song after 3 seconds, and finally play the first file copied into the device.

Additional Information

Ensure the TF card has music files and is properly inserted before powering on the module.