// Accelerometer (Adafruit MPU650)
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
Adafruit_MPU6050 mpu;

//Push button
#define BUTTON_PIN 4

byte lastButtonState = LOW;
byte accelerometer = LOW;

void setup() {
  // Set up code, Run once:
  Serial.begin(115200);
  Serial.println("Starting up!");

  // Accelerometer (Adafruit MPU650)
  // Try to initialize!
  if (!mpu.begin()) {
    Serial.println("Failed to find MPU6050 chip");
    while (1) {
      delay(10);
    }
  }
  mpu.setAccelerometerRange(MPU6050_RANGE_16_G);
  mpu.setGyroRange(MPU6050_RANGE_250_DEG);
  mpu.setFilterBandwidth(MPU6050_BAND_21_HZ);
  Serial.println("");
  delay(100);

  // Push button
  pinMode(BUTTON_PIN, INPUT);
}

//Push button
int lastState = HIGH;

void loop() {
  // Code is run repeatedly in this loop:
  // Accelerometer (Adafruit MPU650)
  /* Get new sensor events with the readings */
  sensors_event_t a, g, temp;
  mpu.getEvent(&a, &g, &temp);
  /* Print out the values */
  Serial.print(a.acceleration.x);
  Serial.print(",");
  Serial.print(a.acceleration.y);
  Serial.print(",");
  Serial.print(a.acceleration.z);
  Serial.println("");

  delay(10);  

  //Push button
  int value = digitalRead((BUTTON_PIN));

  if (millis()-lastTimeButtonStateChanged > debounceDuration){
      byte buttonState = digitalread(BUTTON_PIN)
      if (buttonState != lastButtonState) {
        lastTimeButtonStateChanged = millis();
        lastButtonState = buttonState;
        if (buttonState == LOW) {
          ledState = (ledState == HIGH) ? LOW: HIGH;
          digitalWrite(LED_PIN, ledState);
        }
      }
  }
   if (value == HIGH) {
    Serial.println(" button released");
  }
  if (value == LOW) {
    Serial.println(" button pressed");
  }
}