Fitness Tracker

Hardware Components

1. Microcontroller: Arduino Uno or Raspberry Pi
2. Sensors:
   • Accelerometer (e.g., MPU6050)
   • Heart rate sensor (e.g., MAX30100)
3. Display (optional): OLED display
4. Power Supply: Battery or USB power source
5. Bluetooth Module: HC-05 for communication with a mobile app (if using Arduino)

Software Components

1. Arduino IDE: For programming the microcontroller
2. Mobile App: Could be a simple web app or a native app using frameworks like React Native.

Sample Code for Arduino

Setting Up the Accelerometer

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

MPU6050 mpu;

void setup() {
  Serial.begin(9600);
  Wire.begin();
  mpu.initialize();
  if (!mpu.testConnection()) {
    Serial.println("MPU6050 connection failed");
  }
}

void loop() {
  int16_t ax, ay, az;
  mpu.getAcceleration(&ax, &ay, &az);
  Serial.print("Acceleration X: "); Serial.print(ax);
  Serial.print(" Y: "); Serial.print(ay);
  Serial.print(" Z: "); Serial.println(az);
  delay(1000);
}

Setting Up the Heart Rate Sensor

cppCopy code#include <Wire.h>
#include <MAX30100_PulseOximeter.h>

MAX30100_PulseOximeter pox;

void setup() {
  Serial.begin(9600);
  pox.begin();
}

void loop() {
  pox.update();
  Serial.print("Heart Rate: ");
  Serial.println(pox.getHeartRate());
  delay(1000);
}

Mobile App Example (Using React Native)

You can use libraries like react-native-bluetooth-serial to connect to your Arduino.

Basic Setup

bashCopy codenpx react-native init FitnessTracker
cd FitnessTracker
npm install react-native-bluetooth-serial

Sample Code for App

javascriptCopy codeimport React, { useEffect, useState } from 'react';
import { View, Text, Button } from 'react-native';
import BluetoothSerial from 'react-native-bluetooth-serial';

const App = () => {
  const [data, setData] = useState('');

  useEffect(() => {
    BluetoothSerial.connect('DEVICE_MAC_ADDRESS')
      .then((res) => {
        console.log('Connected', res);
      })
      .catch((err) => console.log(err));

    BluetoothSerial.on('data', (data) => {
      setData(data);
    });

    return () => {
      BluetoothSerial.disconnect();
    };
  }, []);

  return (
    <View>
      <Text>Received Data: {data}</Text>
      <Button title="Connect" onPress={() => {/* Add connection logic */}} />
    </View>
  );
};

export default App;

Next Steps

1. Data Logging: Store data on a cloud server or local storage for long-term tracking.
2. Visualization: Create graphs to visualize progress over time.
3. User Interface: Improve the mobile app interface for better user experience.