Arduino Sketch, "ReadValuesModified", Experiments with DFPlayer #319
Description
Summary
An Arduino sketch for experimenting with DFPlayer Mini MP3 Library.
Code
//ReadValuesModified
/***************************************************
DFPlayer - A Mini MP3 Player For Arduino
<https://www.dfrobot.com/product-1121.html>
***************************************************
This example shows the basic function of library for DFPlayer.
Created 2016-12-07
Modified 2018-08-15
By [Angelo qiao](Angelo.qiao@dfrobot.com)
GNU Lesser General Public License.
See <http://www.gnu.org/licenses/> for details.
All above must be included in any redistribution
****************************************************/
/***********Notice and Trouble shooting***************
1.Connection and Diagram can be found here
<https://www.dfrobot.com/wiki/index.php/DFPlayer_Mini_SKU:DFR0299#Connection_Diagram>
2.This code is tested on Arduino Uno, Leonardo, Mega boards.
****************************************************/
#include "Arduino.h"
#include "DFRobotDFPlayerMini.h"
#if (defined(ARDUINO_AVR_UNO) || defined(ESP8266)) // Using a soft serial port
#include <SoftwareSerial.h>
//SoftwareSerial softSerial(/*rx =*/4, /*tx =*/5);
SoftwareSerial softSerial(16, 17);
#define FPSerial softSerial
#else
#define FPSerial Serial1
#endif
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);
void setup() {
#if (defined ESP32)
FPSerial.begin(9600, SERIAL_8N1, 16, 17);
#else
FPSerial.begin(9600);
#endif
Serial.begin(115200);
Serial.println();
Serial.println(F("DFRobot DFPlayer Mini Demo"));
Serial.print("Compiled at: ");
Serial.println(F(__DATE__ " " __TIME__)); //compile date that is used for a unique identifier
Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));
if (!myDFPlayer.begin(FPSerial, /*isACK = */ true, /*doReset = */ true)) { //Use serial to communicate with mp3.
Serial.println(F("Unable to begin:"));
Serial.println(F("1.Please recheck the connection!"));
Serial.println(F("2.Please insert the SD card or USB drive!"));
while (true) {
delay(0); // Code to compatible with ESP8266 watch dog.
}
}
Serial.println(F("DFPlayer Mini online."));
Serial.print("Files found: ");
Serial.println(myDFPlayer.readFileCounts());
Serial.print("Current file number: ");
Serial.println(myDFPlayer.readCurrentFileNumber());
// value = myDFPlayer.readCurrentFileNumber(); //read current play file number
Serial.print("Player State: ");
Serial.println(myDFPlayer.readState());
// value = myDFPlayer.readState(); //read mp3 state
// value = myDFPlayer.readVolume(); //read current volume
// value = myDFPlayer.readEQ(); //read EQ setting
// value = myDFPlayer.readFileCounts(); //read all file counts in SD card
// value = myDFPlayer.readCurrentFileNumber(); //read current play file number
}
void loop() {
static unsigned long timer = millis();
if (millis() - timer > 3000) {
timer = millis();
int value;
// value = myDFPlayer.readState(); //read mp3 state
// value = myDFPlayer.readVolume(); //read current volume
// value = myDFPlayer.readEQ(); //read EQ setting
// value = myDFPlayer.readFileCounts(); //read all file counts in SD card
// value = myDFPlayer.readCurrentFileNumber(); //read current play file number
value = myDFPlayer.readFileCountsInFolder(3); //read file counts in folder SD:/03
if (value == -1) { //Error while Reading.
Serial.println("Error while Reading file count. ");
printDetail(myDFPlayer.readType(), myDFPlayer.read());
} else { //Successfully get the result.
Serial.print("File count: ");
Serial.println(value);
}
if (myDFPlayer.available()) {
printDetail(myDFPlayer.readType(), myDFPlayer.read()); //Print the detail message from DFPlayer to handle different errors and states.
} else {
Serial.println("myDFPlayer.available() not available");
}
}
}
void printDetail(uint8_t type, int value) {
switch (type) {
case TimeOut:
Serial.println(F("Time Out!"));
break;
case WrongStack:
Serial.println(F("Stack Wrong!"));
break;
case DFPlayerCardInserted:
Serial.println(F("Card Inserted!"));
break;
case DFPlayerCardRemoved:
Serial.println(F("Card Removed!"));
break;
case DFPlayerCardOnline:
Serial.println(F("Card Online!"));
break;
case DFPlayerUSBInserted:
Serial.println("USB Inserted!");
break;
case DFPlayerUSBRemoved:
Serial.println("USB Removed!");
break;
case DFPlayerPlayFinished:
Serial.print(F("Number:"));
Serial.print(value);
Serial.println(F(" Play Finished!"));
break;
case DFPlayerError:
Serial.print(F("DFPlayerError:"));
switch (value) {
case Busy:
Serial.println(F("Card not found"));
break;
case Sleeping:
Serial.println(F("Sleeping"));
break;
case SerialWrongStack:
Serial.println(F("Get Wrong Stack"));
break;
case CheckSumNotMatch:
Serial.println(F("Check Sum Not Match"));
break;
case FileIndexOut:
Serial.println(F("File Index Out of Bound"));
break;
case FileMismatch:
Serial.println(F("Cannot Find File"));
break;
case Advertise:
Serial.println(F("In Advertise"));
break;
default:
break;
}
break;
default:
break;
}
}
Sample Serial Monitor Output
10:21:41.836 -> ets Jul 29 2019 12:21:46
10:21:41.836 ->
10:21:41.836 -> rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
10:21:41.836 -> configsip: 0, SPIWP:0xee
10:21:41.836 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
10:21:41.836 -> mode:DIO, clock div:1
10:21:41.836 -> load:0x3fff0030,len:4832
10:21:41.836 -> load:0x40078000,len:16460
10:21:41.836 -> load:0x40080400,len:4
10:21:41.836 -> load:0x40080404,len:3504
10:21:41.836 -> entry 0x400805cc
10:21:41.978 ->
10:21:41.978 -> DFRobot DFPlayer Mini Demo
10:21:41.978 -> Compiled at: Dec 28 2025 10:17:31
10:21:42.003 -> Initializing DFPlayer ... (May take 3~5 seconds)
10:21:43.029 -> DFPlayer Mini online.
10:21:43.029 -> Files found: 9
10:21:43.067 -> Current file number: -1
10:21:43.594 -> Player State: 0
10:21:46.634 -> File count: 512
10:21:46.634 -> myDFPlayer.available() not available
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