Expanded my previous circuit with the DFPlayer Mini to now activate an arduino servo from 0 – 180 degrees while playing an audio file of a garage door. When pressed again, the servo reverts back from 180 – 0 and again plays the audio file. Six of these will be used to control the bay doors on the Walthers diesel house.

Servo code

// Diesel shop controls via push button and sound
// Author: Michael Peters Bond - Merrimack Valley Railroad

#include <SoftwareSerial.h>
#include <DFRobotDFPlayerMini.h>
#include <Servo.h>

// LEDS
int WELDERLED = 8;

// BUTTONS
int WELDERBUTTON = 4;
int BAY1FRONTBUTTON = 22;

// SERVOS
Servo BAY1FRONTSERVO;

// Servo positions
int BAY1FRONTPOS = 0;

// DFPlayer
SoftwareSerial mySoftwareSerial(11, 12); // RX, TX
DFRobotDFPlayerMini myDFPlayer;

void setup() {
  // Setup leds
  pinMode(WELDERLED, OUTPUT);
  
  // Setup buttons
  pinMode(WELDERBUTTON, INPUT);
  pinMode(BAY1FRONTBUTTON, INPUT);

  // Setup Servos
  BAY1FRONTSERVO.attach(30);
  BAY1FRONTSERVO.write(0);
  
  // Setup DFPlayer Mini
  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);
  }
  Serial.println(F("DFPlayer Mini online."));
  myDFPlayer.volume(20);  //Set volume value. From 0 to 30
 
}

void loop() {
  // Welder Button
  if(digitalRead(WELDERBUTTON) == HIGH)
  {
     myDFPlayer.play(1);
     int i,count;
     //count=random(10,60);
     for (i=0;i<95;i++)
     {
      digitalWrite(WELDERLED, HIGH); // set the LED on
      delay(random(60));
      digitalWrite(WELDERLED, LOW); // set the LED off
      delay(random(200));
     }
  }
  else
  {
    digitalWrite(WELDERLED, LOW);
  }

  // Bay 1 front door button open
  if(digitalRead(BAY1FRONTBUTTON) == HIGH && BAY1FRONTPOS <= 5)
  {
    Serial.print("Bay 1 position: ");
    Serial.println(BAY1FRONTPOS);
    BAY1FRONTPOS = MoveBayDoor(BAY1FRONTSERVO, BAY1FRONTPOS);
    Serial.print("Bay 1 position: ");
    Serial.println(BAY1FRONTPOS);
  }

  // Bay 1 front door button close
  if(digitalRead(BAY1FRONTBUTTON) == HIGH && BAY1FRONTPOS >= 160)
  {
    Serial.print("Bay 1 position: ");
    Serial.println(BAY1FRONTPOS);
    BAY1FRONTPOS = MoveBayDoor(BAY1FRONTSERVO, BAY1FRONTPOS);
    Serial.print("Bay 1 position: ");
    Serial.println(BAY1FRONTPOS);
  }
}

// Method that moves the any bay door.
int MoveBayDoor(Servo BAYSERVO, int BAYCURRENTPOS)
{
  if(BAYCURRENTPOS > 90)
  {
    myDFPlayer.play(2);              // Play the garage door sound
    for (BAYCURRENTPOS = 180; BAYCURRENTPOS >= 0; BAYCURRENTPOS -= 1) {   // goes from 0 degrees to 180 degrees
      // in steps of 1 degree
      BAYSERVO.write(BAYCURRENTPOS);   // tell servo to go to position in variable 'pos'
      delay(80);                            // waits 15ms for the servo to reach the position
    }
  }
  else
  {
    myDFPlayer.play(2);                      // Play the garage door sound
    for (BAYCURRENTPOS = 0; BAYCURRENTPOS <= 180; BAYCURRENTPOS += 1) {   // goes from 0 degrees to 180 degrees
      // in steps of 1 degree
      BAYSERVO.write(BAYCURRENTPOS);   // tell servo to go to position in variable 'pos'
      delay(80);                            // waits 15ms for the servo to reach the position
    }
  }

  return BAYCURRENTPOS;
}