MPU6050 as an accelerator

Using Arduino Sensors
1

hi, i have a project where a wristband will detect if a person is drowning using the speed of the person's movement. I want to use mpu6050 to measure the speed movement of the person, accelerating or decelerating but I keep on getting the angular velocity but that's not what I need
btw here's the code

/*
    MPU6050 Triple Axis Gyroscope & Accelerometer. Simple Accelerometer Example.
    Read more: http://www.jarzebski.pl/arduino/czujniki-i-sensory/3-osiowy-zyroskop-i-akcelerometr-mpu6050.html
    GIT: https://github.com/jarzebski/Arduino-MPU6050
    Web: http://www.jarzebski.pl
    (c) 2014 by Korneliusz Jarzebski
*/    

#include<Wire.h>
#include<MPU6050.h>

MPU6050 mpu;

void setup() {
 Serial.begin(115200);

 Serial.println("Initialize MPU6050");

 while(!mpu.begin(MPU6050_SCALE_2000DPS, MPU6050_RANGE_2G)){
   Serial.println("Could not find a valid MPU6050 sensor, check wiring!");
   delay(500);
 }

  // If you want, you can set accelerometer offsets
  // mpu.setAccelOffsetX();
  // mpu.setAccelOffsetY();
  // mpu.setAccelOffsetZ();
 
 checkSettings();
}

void checkSettings()
{
 Serial.println();
 
 Serial.print(" * Sleep Mode:            ");
 Serial.println(mpu.getSleepEnabled() ? "Enabled" : "Disabled");
 
 Serial.print(" * Clock Source:          ");
  switch(mpu.getClockSource())
  {
    case MPU6050_CLOCK_KEEP_RESET:     Serial.println("Stops the clock and keeps the timing generator in reset"); break;
    case MPU6050_CLOCK_EXTERNAL_19MHZ: Serial.println("PLL with external 19.2MHz reference"); break;
    case MPU6050_CLOCK_EXTERNAL_32KHZ: Serial.println("PLL with external 32.768kHz reference"); break;
    case MPU6050_CLOCK_PLL_ZGYRO:      Serial.println("PLL with Z axis gyroscope reference"); break;
    case MPU6050_CLOCK_PLL_YGYRO:      Serial.println("PLL with Y axis gyroscope reference"); break;
    case MPU6050_CLOCK_PLL_XGYRO:      Serial.println("PLL with X axis gyroscope reference"); break;
    case MPU6050_CLOCK_INTERNAL_8MHZ:  Serial.println("Internal 8MHz oscillator"); break;
  }
 
 Serial.print(" * Accelerometer:         ");
 switch(mpu.getRange()){
    case MPU6050_RANGE_16G:            Serial.println("+/- 16 g"); break;
    case MPU6050_RANGE_8G:             Serial.println("+/- 8 g"); break;
    case MPU6050_RANGE_4G:             Serial.println("+/- 4 g"); break;
    case MPU6050_RANGE_2G:             Serial.println("+/- 2 g"); break;
 } 

 Serial.print(" * Accelerometer offsets: ");
 Serial.print(mpu.getAccelOffsetX());
 Serial.print(" / ");
 Serial.print(mpu.getAccelOffsetY());
 Serial.print(" / ");
 Serial.println(mpu.getAccelOffsetZ());
 
 Serial.println();
}

void loop() {
 	Vector rawAccel = mpu.readRawAccel();
 	Vector normAccel = mpu.readNormalizeAccel();

 	Serial.print(" Xraw = ");
 	Serial.print(rawAccel.XAxis);
 	Serial.print(" Yraw = ");
 	Serial.print(rawAccel.YAxis);
 	Serial.print(" Zraw = ");

 	Serial.println(rawAccel.ZAxis);
 	Serial.print(" Xnorm = ");
 	Serial.print(normAccel.XAxis);
 	Serial.print(" Ynorm = ");
 	Serial.print(normAccel.YAxis);
 	Serial.print(" Znorm = ");
 	Serial.println(normAccel.ZAxis);
 	
 	delay(10);
}
2

This minimal code will get and print all the measured values from the MPU-6050.

// MPU-6050 Short Example Sketch
// By Arduino User JohnChi
// August 17, 2014
// Public Domain
#include<Wire.h>
const int MPU_addr = 0x68; // I2C address of the MPU-6050
int16_t AcX, AcY, AcZ, Tmp, GyX, GyY, GyZ;

void setup() {
  Wire.begin();
  Wire.beginTransmission(MPU_addr);
  Wire.write(0x6B);  // PWR_MGMT_1 register
  Wire.write(0);     // set to zero (wakes up the MPU-6050)
  Wire.endTransmission(true);
  Serial.begin(9600);
}

void loop() {
  Wire.beginTransmission(MPU_addr);
  Wire.write(0x3B);  // starting with register 0x3B (ACCEL_XOUT_H)
  Wire.endTransmission(false);
  Wire.requestFrom(MPU_addr, 14); // request a total of 14 registers
  int16_t t = Wire.read();
  AcX = (t << 8) | Wire.read(); // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
  t = Wire.read();
  AcY = (t << 8) | Wire.read(); // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
  t = Wire.read();
  AcZ = (t << 8) | Wire.read(); // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
  t = Wire.read();
  Tmp = (t << 8) | Wire.read(); // 0x41 (TEMP_OUT_H) & 0x42 (TEMP_OUT_L)
  t = Wire.read();
  GyX = (t << 8) | Wire.read(); // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
  t = Wire.read();
  GyY = (t << 8) | Wire.read(); // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
  t = Wire.read();
  GyZ = (t << 8) | Wire.read(); // 0x47 (GYRO_ZOUT_H) & 0x48 (GYRO_ZOUT_L)
  t = Wire.read();
  Serial.print("AcX = "); Serial.print(AcX);
  Serial.print(" | AcY = "); Serial.print(AcY);
  Serial.print(" | AcZ = "); Serial.print(AcZ);
  Serial.print(" | Tmp = "); Serial.print(Tmp / 340.00 + 36.53); //equation for temperature in degrees C from datasheet
  Serial.print(" | GyX = "); Serial.print(GyX);
  Serial.print(" | GyY = "); Serial.print(GyY);
  Serial.print(" | GyZ = "); Serial.println(GyZ);
  delay(333);
}
3

hi what I want is the sensor to show in serial monitor if the person's movement is fast or slow is that possible? not the objects change in angle

4

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