/***************************************************
DFPlayer - A Mini MP3 Player For Arduino
 <https://www.dfrobot.com/product-1121.html>

 ***************************************************
 This example shows the basic function of library for DFPlayer.

 Created 2016-12-07
 By [Angelo qiao](Angelo.qiao@dfrobot.com)

 GNU Lesser General Public License.
 See <http://www.gnu.org/licenses/> for details.
 All above must be included in any redistribution
 ****************************************************/

/***********Notice and Trouble shooting***************
 1.Connection and Diagram can be found here
 <https://www.dfrobot.com/wiki/index.php/DFPlayer_Mini_SKU:DFR0299#Connection_Diagram>
 2.This code is tested on Arduino Uno, Leonardo, Mega boards.
 ****************************************************/

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

SoftwareSerial mySoftwareSerial(10, 11); // RX, TX
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);

int buttonState;
int lastButtonState = HIGH;
unsigned long lastDebounceTime = 0;

int buttonState2;
int lastButtonState2 = HIGH;
unsigned long lastDebounceTime2 = 0;

int buttonState3;
int lastButtonState3 = HIGH;
unsigned long lastDebounceTime3 = 0;

int buttonState4;
int lastButtonState4 = HIGH;
unsigned long lastDebounceTime4 = 0;



void setup()
{
  mySoftwareSerial.begin(9600);
  Serial.begin(115200);

  Serial.println();
  Serial.println(F("DFRobot DFPlayer Mini Demo"));
  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));

  if (!myDFPlayer.begin(mySoftwareSerial)) {  //Use softwareSerial to communicate with mp3.
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while(true){
      delay(0); // Code to compatible with ESP8266 watch dog.
    }
  }
  Serial.println(F("DFPlayer Mini online."));

  pinMode (5, INPUT_PULLUP);
  pinMode (4, INPUT_PULLUP);
  pinMode (3, INPUT_PULLUP);
  pinMode (2, INPUT_PULLUP);
  myDFPlayer.volume(10);  //Set volume value. From 0 to 30

}

void loop()
{
 int reading = digitalRead (5);
 if (reading != lastButtonState){
  lastDebounceTime = millis () ;
  }
  if ((millis() - lastDebounceTime) > 50){
    if (reading !=lastButtonState){
      buttonState = reading;
      if (buttonState ==LOW) {
        myDFPlayer.play(1);
      }
    }
  }
  lastButtonState = reading;

 int reading2 = digitalRead (4);
 if (reading2 != lastButtonState2){
  lastDebounceTime2 = millis () ;
  }
  if ((millis() - lastDebounceTime2) > 50){
    if (reading2 !=lastButtonState2){
      buttonState2 = reading2;
      if (buttonState2 ==LOW) {
        myDFPlayer.play(2);
      }
    }
  }
  lastButtonState2 = reading2;

 int reading3 = digitalRead (3);
 if (reading3 != lastButtonState3){
  lastDebounceTime3 = millis () ;
  }
  if ((millis() - lastDebounceTime3) > 50){
    if (reading3 !=lastButtonState3){
      buttonState3 = reading3;
      if (buttonState3 ==LOW) {
        myDFPlayer.play(3);
      }
    }
  }
  lastButtonState3 = reading3;

 int reading4 = digitalRead (2);
 if (reading4 != lastButtonState4){
  lastDebounceTime4 = millis () ;
  }
  if ((millis() - lastDebounceTime4) > 50){
    if (reading4 !=lastButtonState4){
      buttonState4 = reading4;
      if (buttonState4 ==LOW) {
        myDFPlayer.play(4);
      }
    }
  }
  lastButtonState4 = reading4;

}

void printDetail(uint8_t type, int value){
  switch (type) {
    case TimeOut:
      Serial.println(F("Time Out!"));
      break;
    case WrongStack:
      Serial.println(F("Stack Wrong!"));
      break;
    case DFPlayerCardInserted:
      Serial.println(F("Card Inserted!"));
      break;
    case DFPlayerCardRemoved:
      Serial.println(F("Card Removed!"));
      break;
    case DFPlayerCardOnline:
      Serial.println(F("Card Online!"));
      break;
    case DFPlayerUSBInserted:
      Serial.println("USB Inserted!");
      break;
    case DFPlayerUSBRemoved:
      Serial.println("USB Removed!");
      break;
    case DFPlayerPlayFinished:
      Serial.print(F("Number:"));
      Serial.print(value);
      Serial.println(F(" Play Finished!"));
      break;
    case DFPlayerError:
      Serial.print(F("DFPlayerError:"));
      switch (value) {
        case Busy:
          Serial.println(F("Card not found"));
          break;
        case Sleeping:
          Serial.println(F("Sleeping"));
          break;
        case SerialWrongStack:
          Serial.println(F("Get Wrong Stack"));
          break;
        case CheckSumNotMatch:
          Serial.println(F("Check Sum Not Match"));
          break;
        case FileIndexOut:
          Serial.println(F("File Index Out of Bound"));
          break;
        case FileMismatch:
          Serial.println(F("Cannot Find File"));
          break;
        case Advertise:
          Serial.println(F("In Advertise"));
          break;
        default:
          break;
      }
      break;
    default:
      break;
  }

}