saber

#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h>
#include <Wire.h>
#include <I2Cdev.h>
#include <MPU6050.h>

MPU6050 accelgyro;
int16_t ax, ay, az;    // define accel as ax,ay,az
int16_t gx, gy, gz;    // define gyro as gx,gy,gz
int16_t px, py, pz;    // previous accel settings
long x, y, z;
long accel;         // calc accel

int inPin = 9;         // the number of the input pin
int outPin = 10;       // the number of the output pin
int ledPin = 11;

int reading;           // the current reading from the input pin
int previous = LOW;    // the previous reading from the input pin

int brightness = 0;    // how bright the LED is
int fadeAmount = 5;    // how many points to fade the LED by

int track = 20;
int prev = 20;

boolean state = false; // the current state of the circuit

// the follow variables are long's because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long time = 0;         // the last time the output pin was toggled
long debounce = 500;   // the debounce time, increase if the output flickers
long looptime = 0;     // the last time the loop was played
long gtime = 0;

SoftwareSerial mySerial(0, 1); // RX, TX

void setup()
{
  Wire.begin();              // join I2C bus
  //Serial.begin(38400);       // initialize serial communication
  //while (!Serial);           // wait for Leonardo enumeration, others continue immediately
  Serial.println("INIT");
  accelgyro.initialize();

  Serial.println(accelgyro.testConnection() ? "MPU6050 connection successful" : "MPU6050 connection failed");

  mySerial.begin(9600);
  mp3_set_serial(mySerial);  //set Serial for DFPlayer-mini mp3 module

  pinMode(inPin, INPUT);
  pinMode(outPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop()
{
  reading = digitalRead(inPin);
  accelgyro.getMotion6(&ax, &ay, &az, &gx, &gy, &gz);   // read measurements from device

  if(millis() - gtime > 500) {
    x=px-ax; y=py-ay; z=pz-az;
    x=abs(x); y=abs(y); z=abs(z);
    accel = (x+y+z);
    px = ax; py = ay; pz = az;

    if(state && accel > 15000) {
      mp3_play(random(31,34));
        //analogWrite(outPin, 255); delay(100);
        //analogWrite(outPin, 50); delay(100);
        //analogWrite(outPin, 255); delay(100);
        //analogWrite(outPin, 200); delay(100);
      looptime = millis()-2000;
    }

    Serial.print(gx);Serial.print(" ");Serial.print(gy);Serial.print(" ");Serial.println(gz);
    Serial.println(accel);

    gtime = millis();
  }

  if (reading == HIGH && previous == LOW && millis() - time > debounce) {
    if (!state) {
      digitalWrite(ledPin, HIGH);
      looptime = millis();
      mp3_play(1);
      for(brightness = 0; brightness < 200; brightness++) {
        analogWrite(outPin, brightness);
        delay(16);
      }
      state = true;
    } else {
      mp3_play(2);
      for(brightness = 200; brightness > -1; brightness--) {
        analogWrite(outPin, brightness);
        delay(7);
      }
      digitalWrite(ledPin, LOW);
      state = false;
    }
    time = millis();
  }

//  if (state && millis() - looptime > 4000) {
//    while (track == prev) {
//      track = random(21,24);
//    }
//    mp3_play(track);
//    prev = track;
//    looptime = millis();
//  }

  previous = reading;
}