DFPlayer Commands to get Informations

This is my first tread in this forum, so I ask your forbearance if I do anything wrong.

At the moment I am building an MP3 player and using Comands to control it.
But I have not yet managed to use the commands so that they return information to me.
For examle. I want to get the number of Folders of the mircroSD-card inside the DFPlayer.
The command should be as follows: 0x4F
So I tried: if( folderNr == 2 ) { ….
But it dosent work. How I using the Command in the right way?#

Thanks in Advance!

Your LuciLuzifer

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