I'm a beginner to Arduino and I am working on my first MP3 project, I am stuck on how to send commands to my MP3 module (it's the Dorhea YX5300 UART Control Serial MP3 Music Player).
I am using this code from the project hub and it's working well, but I can't find out the step by step on how or where to input new commands (from the ones following #define before void setup) into the void loop.
What would the commands look like? Do they just go in void loop or do I need to add anything else? I am specifically trying to use CMD_SET_VOLUME to set the volume at the max level.
Any help would be really appreciated!