DFPlay Enhanced Library for the DFPlayer - Arduino Port

The author wrote DFPlay as a library for Particle devices.

Particle prerelease version 0.0.10 was ported to Arduino in September 2018 by Federico Busero. Limited Arduino testing was done in relation to the following project:
https://community.blynk.cc/t/audio-mp3-music-esp8266-dfrobot-dfplayer-mini-music-player-widget-wifi-nodemcu-wemos-d1/28513

This version is retained for other Arduino users to use. Note that it is a "one time port", and that it is not maintained or enhanced by the author.

None of the example programs have been ported, but the following should not be difficult to port.

• PlaySD.ino
• PlaySD-timer.ino

The other examples define "Particle Functions" that allow users to interface with the Particle MPU and to control the DFPlayer via the Particle Cloud. These will be more difficult to port to Arduino.

• DoorAlarm.ino
• PlayList.ino
• PlaySelection.ino

None of the documentation has been adjusted for Arduino devices ... but Arduino users who use the DFPlayer should still find it relevant.

DFPlay Enhanced Library for the DFPlayer - Particle Field Test #1

Version 0.0.9
Function Complete*
Test Complete
Field Test in Progress.

*Since this release, the project has been amended to include some additional functionality. This includes the ability to skip forwards and backwards within folders and media plays.

Known issues:

• Skip function does not work properly when skipping to last track in the folder or media.