DFR0534

An Arduino Uno/Nano/ATmega328p, ESP32 library for a DFR0534 audio module. The library works with SoftwareSerial/HardwareSerial and is very similar to https://github.com/sleemanj/JQ8400_Serial, but is no fork.

PDF-Documentation

Examples, how to use the library

• playFileByName
• playFileByNumber
• playCombined

SoftwareSerial for Arduino Uno/Nano/ATmega328p

To create a DFR0534 object pass the SoftwareSerial object as a parameter to the DFR0534 constructor, for example

#include <SoftwareSerial.h>
#include <DFR0534.h>

#define TX_PIN A0
#define RX_PIN A1
SoftwareSerial g_serial(RX_PIN, TX_PIN);
DFR0534 g_audio(g_serial);
...

HardwareSerial for ESP32

To create a DFR0534 object pass the HardwareSerial object as a parameter to the DFR0534 constructor, for example

#include <DFR0534.h>

#define TX_PIN 19
#define RX_PIN 23
HardwareSerial g_serial(1);

DFR0534 g_audio(g_serial);

void setup() {
  g_serial.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN);
...

License and copyright

This library is licensed under the terms of the 2-Clause BSD License Copyright (c) 2024 codingABI.

Appendix

Supported functions

Function	Notes
decreaseVolume
fastBackwardDuration
fastForwardDuration
getDrive	Returns DFR0534::DRIVEUSB, DFR0534::DRIVESD, DFR0534::DRIVEFLASH or DFR0534::DRIVEUNKNOWN, Example playFileByNumber
getDrivesStates	Returns bitmask for DFR0534::DRIVEUSB, DFR0534::DRIVESD, DFR0534::DRIVEFLASH, Example playFileByNumber
getDuration
getFileName	Example playFileByNumber
getFileNumber	Example playFileByNumber
getFirstFileNumberInCurrentDirectory	Example playFileByNumber
getRuntime
getStatus	Returns DFR0534::STOPPED, DFR0534::PLAYING, DFR0534::PAUSED or DFR0534::STATUSUNKNOWN, Example playFileByNumber
getTotalFiles	Example playFileByNumber
getTotalFilesInCurrentDirectory	Example playFileByNumber
increaseVolume
insertFileByNumber
pause
play
playCombined	The DFR0534 uses a special two char file name format and fixed folder /ZH for this function. Look at the example playCombined or comments to this function in DFR0534.cpp for details
playFileByName	The DFR0534 uses a special 8+3 file name format. Before using this function take a look at the example playFileByName or the comments to this function in DFR0534.cpp for details
playFileByNumber	Example playFileByNumber
playLastInDirectory
playNext
playNextDirectory
playPrevious
prepareFileByNumber
repeatPart
setChannel	Seems make no sense on a DFR0534 audio module
setDrive	Supports DFR0534::DRIVEUSB, DFR0534::DRIVESD and DFR0534::DRIVEFLASH
setDirectory	Seems not to work
setEqualizer	Supports DFR0534::NORMAL, DFR0534::POP, DFR0534::ROCK, DFR0534::JAZZ and DFR0534::CLASSIC
setLoopMode	Supports DFR0534::LOOPBACKALL, DFR0534::SINGLEAUDIOLOOP, DFR0534::SINGLEAUDIOSTOP, DFR0534::PLAYRANDOM, DFR0534::DIRECTORYLOOP, DFR0534::RANDOMINDIRECTORY, DFR0534::SEQUENTIALINDIRECTORY and DFR0534::SEQUENTIAL
setRepeatLoops
setVolume	Volume level (0 = mute, 30 = max), Example playFileByNumber
startSendingRuntime
stop
stopCombined
stopInsertedFile
stopRepeatPart
stopSendingRuntime

For function details see comments in DFR0534.cpp

DFR0534 pinout

Minimal schematic to use this library

Pin	Connected to
TX	SoftwareSerial/HardwareSerial RX
RX	SoftwareSerial/HardwareSerial TX*
GND	Ground
VCC	3.3-5V
SP+	Speaker + connector
SP-	Speaker - connector

*If your microcontroller runs at 5V, use a 1k resistor between RX and SoftwareSerial/HardwareSerial TX.