DFcontroller

Receives SD card sound file data of Arduino sound module dfplayer through Bluetooth and uses the data to remotely control dfplayer in an mp3 player environment.

Intuitive control by using the track name by importing the track list.

-Bluetooth 2.0 Classic HC-06 module
-Bluetooth 4.0 BLE AT-09 module
-ESP8266 NodeMc
-ESP32 DevKit

1.HC06/AT09 + DFPlayer mini
2.HC06/AT09 + Arduino + DFPlayer mini
3. ESP8266 NodeMcu WiFi soft AP + DFPlayer mini
4.ESP32 DevKit Bluetooth 2.0 Classic / 4.0 BLE / WiFi soft AP + DFPlayer mini

Arduino sound module DFPlayer remote control app

This app controls DFplayer in the MP3 player environment.

Support Bluetooth 2.0 / BLE (Android version 10 or lower) / WiFi (Android version 8 or lower) connection control
** Bluetooth module HC-06, BLE module AT-09, ESP8266 NodeMcu wifi, ESP32 Bluetooth 2.0 / BLE / wifi
** Communication module can be controlled by directly connecting with DFplayer
** Arduino and development board can be used by adding code

You can control DFplayer's tracks using the track names read from the track list file.
Through DCmode, you can control using the file number in the folder.

-Support custom shuffle function
If you are not using the random play function of DFplayer, you can play using the shuffle track number created in the app.
However, since each track is played by the app, a constant communication connection is required.

-RGB LED control color picker function

-Dial knob function for PWM control
** Convenient PWM control using digital dial

-Bluetooth 4.0 BLE Custom UUID setting function

-User setting function of PWM data transmission interval using Wi-Fi and Bluetooth

-User setting function of Wi-Fi and Bluetooth data reception interval

-Android system date and time data transmission function

-Function to set whether to use timer for data reading
** If there is no data received from Arduino, the timer is stopped to reduce power consumption.

-Low power BLE function applied
** BLE does not use a separate timer when receiving data.

blog
https://nxpop.tistory.com/5