#include <Arduino.h>
#include <SoftwareSerial.h>
#include "DFRobotDFPlayerMini.h"

int music_num;
SoftwareSerial mySoftwareSerial(10, 11); // #1
DFRobotDFPlayerMini myDFPlayer; // #2

// Setup Section
void setup() {
	mySoftwareSerial.begin(9600);
	Serial.begin(115200);
	myDFPlayer.begin(mySoftwareSerial); // #3
	myDFPlayer.volume(20);
}

// Loop Section
void loop() {
	if (Serial.available() > 0) {
		music_num = Serial.readString().toInt(); // #4
		if (music_num < 5 && music_num > 0) {
			switch (music_num) {
				case 1:
					Serial.println("1");
					myDFPlayer.play(1);
					break;
				case 2:
					Serial.println("2");
					myDFPlayer.play(2);
					break;
				case 3:
					Serial.println("3");
					myDFPlayer.play(3);
					break;
				case 4:
					Serial.println("4");
					myDFPlayer.play(4);
					break;
			}
		}
	}
}