FB Heart Rate Monitor

Share real-time heart rate data from Fitbit watches via Bluetooth Low Energy

Project maintained by randalln Hosted on GitHub Pages — Theme by mattgraham

FB Heart Rate Monitor for Fitbit Sense, Versa 3, Versa 2, Versa Lite, Versa, and Ionic

A pair of apps: one for a Fitbit™ smart watch, and one for an Android or iOS device, that create a mock Bluetooth heart rate monitor.

This lets you share real time heart rate data from the Fitbit™ watch with exercise equipment (like Peloton) or fitness apps (like Strava, Zwift, or Wahoo).

Currently, the Fitbit™ smart watches measure heart rate, but do not advertise as generic heart rate monitors and can only maintain one Bluetooth Low Energy connection with the Fitbit™ mobile app. As a workaround, we’ll send heart rate data from the watch to the mobile device. Then, we’ll run our app that appears as a Bluetooth Low Energy peripheral and advertises as a generic heart rate monitor. Finally, we’ll push heart rate data from the Fitbit™ mobile app to our FB Heart Rate Monitor app.

Much thanks to the original author, @mogenson

Thanks to @cwcpers, who got the watch app working on OS 4 devices (Versa 2, Versa Lite, Versa, Ionic)

Requirements

  1. One of the Fitbit™ smart watches (with the Fitbit Gallery) noted above and a device running at least Android 9 or iOS 15.6
  2. If you plan on running a fitness app on a mobile device, e.g. Strava, you’ll need a second device, because FB Heart Rate Monitor will need to run on the same (bluetooth) device as the Fitbit™ app.
    For example, I run Wahoo or Strava on my iPad or spare old Android phone and FB Heart Rate Monitor on my regular phone (where Fitbit™ is installed)

Installation

  1. Install the HR Service Fitbit™ watch app from the Fitbit Gallery
  2. Install the FB Heart Rate Monitor app:

    Android

    Install from Google Play

    iOS

  3. Install AltStore Classic
  4. Add a new source to AltStore Classic: https://randalln.github.io/fitbit-heart-rate-service/altstore.json
  5. Install FB Heart Rate Monitor

Usage

  1. Start the HR Service app on the Fitbit™ watch.
  2. Start the FB Heart Rate Monitor app on the mobile device.
    • You should see the BPM value update with each new received value.
  3. On your exercise equipment or an app like Strava (on your second mobile device), search for a Bluetooth heart rate monitor.
    • The mock heart rate monitor will have the same name as the mobile device.

Disclaimer

No implied warranty or guarantee of functionality. The names Fitbit, Android, iOS, and Bluetooth are trademarks of their respective owners.

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