Real-time heart rate overlay for streaming

This repo provides a real-time heart rate graph that can be selected as a source in Xsplit or OBS to overlay on a stream. To use this repo, you'll need a bluetooth enabled computer, a bluetooth heart rate band, and you'll need node installed. I've only tested it with a Polar HR7 band.

stream.js reads from the heart rate band and logs the latest rate to rate.json (This uses Noble)

Video example

How to use this

• Install node
• Clone this repo
• In the root directory, run npm install to install requirements
• While wearing the Polar H7, run node stream.js
• After a few seconds, you should see heart rate data logged into the terminal (and you can double check rate.js to make sure it's updating)
• Then, simply open index.html and you should see the overlay.

I recommend serving this through python simple HTTP server (or some other simple server) so that you can easily add it as a source in your streaming software.

Notes

This should function with other bluetooth heart rate sensors that broadcast the 180d service. This does not include Fitbit Charge HR - to my knowledge the Charge HR does not broadcast the heart rate service over bluetooth.