Hi all, done enough searching to see that multiple people have had problems with the audio modules based on the GD3300D, like this one https://www.amazon.com/HiLetgo-YX5300-Control-Serial-Arduino/ (masquerading as a YX5300).
No matter what I do, it won't play from a folder. Looks like it reads all the files into a big list. I'm using the SerialMP3Player library.
EDIT: I found this line commented out in the SerialMP3Player.h file:
"//#define CMD_PLAY_F_FILE 0X0F // only available for Flash not SD Card.
I wonder if any of these modules can play a specific file in a specific folder, or they work by amalgamating all the files in all folders into a big index? Any advice would be welcome, as I am building a jukebox with lots of files. Ideally I'd like to point to a folder and then a specific file in that folder e.g. 01 (Folder) -> Play File 003.
Phil