Arduino Nano Every MP3

1#include <Wire.h>
2#include <Adafruit_GFX.h>
3#include <Adafruit_SSD1306.h>
4
5#include "Arduino.h"
6#include "SoftwareSerial.h"
7#include "DFRobotDFPlayerMini.h"
8
9Adafruit_SSD1306 display(128, 32, &Wire, 4);
10
11SoftwareSerial mySoftwareSerial(10, 11); // RX, TX
12DFRobotDFPlayerMini myDFPlayer;
13
14#define v A0 //vol up
15#define s A1 //vol down
16#define pp 9 //state button (if it's pressed or not)
17
18int vol= 20, pv=0;//state button's consequence 
19
20void setup()
21{
22   if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
23   while(true);
24  }
25  display.display();
26  display.clearDisplay();
27
28  mySoftwareSerial.begin(9600);
29  Serial.begin(9600);
30  
31  pinMode(pp,INPUT_PULLUP);
32
33   if (myDFPlayer.begin(mySoftwareSerial)) 
34  {
35    Serial.println("\r\n\r\nOK");   //  ← ←  CONFIRMATION Note
36    // Set volume to maximum (0 to 30).
37    myDFPlayer.volume(30);
38  } 
39  else 
40  {
41    Serial.println("Connecting to DFPlayer Mini failed!");
42  }
43    
44}
45
46
47void loop()
48{
49  
50int x = analogRead(v);
51int y = analogRead(s);
52
53int button = !digitalRead(pp);
54 
55  if(digitalRead(pp)==0){
56    if(pv == 0){
57    myDFPlayer.start();
58    display.drawRect(90, 5, 5, 25, WHITE);
59    display.drawRect(100, 5, 5, 25, WHITE);//--> start logo
60    display.display();
61    pv=1;
62    }
63    else if(pv == 1){
64    myDFPlayer.pause();
65    display.drawLine(100, 5, 120, 15, WHITE);
66    display.drawLine(100, 5, 100, 25, WHITE);//-->pause logo 
67    display.drawLine(100, 25, 120, 15, WHITE);
68    display.display();
69    pv=0;
70    }
71  }
72  if(analogRead(s)==0){
73    myDFPlayer.next();
74  }
75  if(analogRead(s)==1023){
76    myDFPlayer.previous();
77    
78  }
79  if(analogRead(v)==1023 && vol<30){
80    vol=vol+1;
81    myDFPlayer.volume(vol);
82  }
83  if(analogRead(v)==0 && vol>0){
84    vol=vol-1;
85    myDFPlayer.volume(vol);
86  }
87
88 display.clearDisplay();
89 display.setTextSize(1);
90 display.setTextColor(WHITE);
91
92 display.setCursor(0, 0);
93 display.print("Volume");
94 display.setCursor(50, 0);
95 display.print(vol);
96 display.setCursor(128, 0);
97 display.print("Track");
98 display.setCursor(45, 10);
99 display.print(myDFPlayer.readCurrentFileNumber());
100 display.display();
101
102}