ArduinoCode

#include <Servo.h> //library to control servo
#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h> //library to control dfplayer mini
#include <MsTimer2.h> //to use timer
Servo servo1;

int grado = 10;
int sensorValue; 
int count = 0;
int digit = 0;

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  servo1.attach(2); //servo motor connected to D2
  servo1.write(grado);
  mp3_set_serial (Serial);  //set Serial for DFPlayer-mini mp3 module 
  delay(1);  //wait 1ms for mp3 module to set volume
  mp3_set_volume (25); //set volume
}

void robotics(){
  digit = 1;
}

// the loop routine runs over and over again forever:
void loop() {
  sensorValue = analogRead(A0); // read the input on analog pin 0:
  // print out the value you read:
  grado = sensorValue/5,68;
  Serial.println(sensorValue);
  if(sensorValue > 150){
    Serial.print("robotics");
    servo1.write(grado+100);
    delay(300);
    count++;
  }
  if(count==1){
  MsTimer2::set(5000, robotics);//set Timer 5 sec
  MsTimer2::start();
  if(digit ==1){
    grado=10;
    mp3_play (20);//play 0020.mp3
    delay (3000);
    servo1.write(grado);
    count = 0;
    digit=0; 
  }
 }
}