Hi Matthew,
The code you're looking for is something like this:
#include <DFPlayer_Mini_Mp3.h>
...
if(s == "xxxxxx") {
mp3_play (1); // play file "0001.mp3" in the folder "mp3"
}
if(s == "xxxxxx") {
mp3_play (2); // play file "0002.mp3" in the folder "mp3"
}
if(s == "xxxxxx") {
mp3_play (3); // play file "0003.mp3" in the folder "mp3"
}