DfPlayer nod and adjust the volume

Hello, is here any way how to work with DfPlayer mini (https://wiki.dfrobot.com/DFPlayer_Mini_SKU_DFR0299)? Because, I can’t find some nod for this modul and I don’t know programming for creating own nod in C++.
What I need:
Listen analog port (potentiometer, light sensor, …) and set the volume. Probably via map range.
thank you for your ideas.