iFitController

Simple websockets client proof of concept to control NordicTrack iFit enabled treadmills.

Can capture data from the socket and send events during exercise and allow for storing and graphing. No root access to android treadmill controller needed or was required, standard port 80 on version 3.4.0324.0.0.5.2.3 of firmware is open to IP ANY/ANY. This may change, so you may want to freeze the version on your treadmill.

No reverse engineering was required, we simply used the repair tool access from iFit, then exit to desktop as they explain if you need to restore the firmware. After that we started the file browser Astro. From there /var/log/messages contained all the logged connections to the uthttpd process that controls the treadmill functions.

Replaying these events via a remote websocket resulted in speed, incline and other changes. Turns out they are simple JSON formatted strings such as:

#SETSPEED
#start & speed:
{ "values": {"MPH":"2" },"type":"set" }

#stop
{ "values": {"MPH":"0" },"type":"set" }

#FAN
#stop
{ "values": {"Fan Speed":"0" },"type":"set" }

#half
{ "values": {"Fan Speed":"50" },"type":"set" }

Sliders have been built to replicate these commands. In addition while there is an active websockets connection, events from the machine are relayed to any websocket hosts connected. We keyed off the chest heart rate sensor and also capture speed and incline into a realtime scrolling graph for heartrate and speed and incline, and also a downloadable CSV format in the javascript session. That file that can be downloaded after your session is complete for later use in Excel etc (see below).

Here you can see Elmo enjoying his ride!

We hope this software is useful for others, if you have ideas for extension please feel free to submit a pull request, there are some ideas in the TODO section below.

Installing

Set Treadmill address in ifit.js

// Set IP address of treadmill..

var treadmill = "10.0.1.6";

Load ifit.html into your browser from file:///

file:///Users/jcuff/iFitController/ifit.html 

or pop it on a webserver that can see your treadmill... you will want to password protect that page if you have children or spouses who like to mess with your run. The websocket on these treadmills are wide open as of the current firmware, which is great for this application, but bad for security.

There's a Download Run Data button that will dump the events to a csv file so you can open in Excel etc. to look at your run. Currently keyed off chest heart rate events and any other changes to elevation and or speed.

Packages used

Kudos and thanks to each of the following that were used to build this app:

• repair tool access from iFit
• jQuery
• d3js
• sprintf
• epoch

NOTE: All trademarks are of their respective owners.

This application is in NO WAY affiliated or endorsed with or by any product!

Authors

• James Cuff
• Michele Clamp

TODO

• Add "workouts" to be able to replay previous workouts, and/or challenges e.g. rolling hills, intervals etc.
• Alexa style voice commands could be fun. e.g. "Alexa, set treadmill to five miles per hour".
• Nice iPad/tablet interface app or html that can be used while you are on the treadmill.
• Comparison of previous runs/workouts - delta of current heartrate, like the concept of a "shadow" run.
• Accessibility issues - we could help with this question here
• Export to other formats, TCX, Strava etc.

Acknowledgments

• Hat tip to Ventz!

Example Output:

Realtime graphing and console

Downstream processing by Excel of CSV file