#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>

Adafruit_MPU6050 mpu;

float accel;
int falltime;

void setup(void) {
  Serial.begin(115200);
  pinMode(7, OUTPUT);
  digitalWrite(7,LOW);
  while (!mpu.begin()) {
    Serial.println("MPU6050 not connected!");
    delay(1000);
  }
  Serial.println("MPU6050 ready!");
}

sensors_event_t event;

void loop() {
  mpu.getAccelerometerSensor()->getEvent(&event);
  accel = (event.acceleration.x + event.acceleration.y + event.acceleration.z);
  Serial.print("Acceleration: ");
  Serial.print(accel);
  Serial.println(" m/s^2");

  if ((-0.5 <= accel)and(accel <= 0.5)) {
    falltime = falltime + 1;
  } else {
    falltime = 0;
  }
  if (falltime == 30) {
    Serial.println("FALL DETECTED");
    digitalWrite(7,HIGH);
    while(true);
  }
  delay(10);
}