Pull GPIO2 to 3V3, with a resistor (e.g. 10k) For easier operation, wire pushbuttons between GPIO0 and GND (rather than tieing it permanently) and Reset and GND. That allows you to reset the module by ...

In the code we check every active channel (here there are 11 channels cheking the state of each button) and if the signal is high (button pressed), we play a sound. DFPLayer mini: We conneect it to ...