Pebble Health

An Intro To Wearables and Fitness Tracking




Me

@anaptfox
Taron Foxworth

Software Engineer 

 

I Love Wearables :)

What is a wearable?



Clothing and/or accessory incorporating computer and advanced electronic technologies.


 Google Glass

Nod

Myo Gesture Control Armband

 Fit Bit Force

 JawboneUP

 Nike Sports Watch

Fitness Wearables

What can they do?

  • Steps Traveled
  • Calories Burned
  • Hours Slept
  • Distance Traveled
  • Quality of Sleep
  • Active Minutes
  • Inactivity Alarm

My Current State


What I eventually realized...

1. I'm not Iron Man :(
2. I had to keep a lot of things charged




I wanted just one device. So I started researching. 

 THE PEBBLE IS AWESOME.





 

How?

 3D accelerometer 



Pebble Health

Pebble Health Philosophy


 Goal Tracking vs. Inactivity TrackingLive Data


 

Demo Here

Pebble App

Watch App
C programming Language
Step Calculation











Isaiah PebbleKit
Javascript
HTTP Request
Cross Platform

Web Server

No Sql Database

Real time communication using web sockets

Asynchronous Javascript on the server
Modulus
Real Time MVC Framework




Client App


Client Side Javascript Framework
Socket.io
Angular JS

Architecture 

Problems

  • Bleeding Edge Pebble
  • Sails.js
  • Mobile Latency
  • Location and Distance

Steps

Accelerometer sampling rate : 50hz
Subscribe to receive batch every 25 samples.

Average every 5 samples

Calculate acceleration vector

Compare 

Step Error

Error rate
Factors That Effect Steps
Driving
Working out
Waving
Giving a Talk

FitBit - 2782 Steps
PebbleHealth - 2953 step


5.78% Error

Location

Isaiah PebbleKit

Grab location using phone's GPS

Distance

Haversine formula



Speed



Calories






Basal Metabolic Rate

2.67 Calories / min

1920.9 Calories/ day

According to Shape Up America, you burn 1 calorie every 20 steps

Resting Calories Burned





Calories by Step

Practical Uses and The Future


PebbleJoint


Voice Reminders


Thank You




Questions

Pebble Health

By Taron Foxworth

Pebble Health

Presentation for my Senior Seminar at Xavier University

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