Add support for SpO2

[leoherzog]

Fitbit is rolling out official SpO2 measurements during sleep, and including the data in their own watch faces. Is there an API for this that you could tap into?

Love the face! And love that it's open source!

[jdhartley]

Thanks Leo, I am really excited about the new devices and these new API updates. As of now, there isn't an API available to not-Fitbit, but I expect SDK 5.0 will include some awesome features. I am keeping an eye out for them!!

[nayfield]

I would love this too.

Insights:

• SpO2 (and other stats) are only recorded when sleeping.
• for some reason the code to record SpO2 is in the face. I think you can track sleep and maybe wrist temp and hrv even with the reference sdk simple face.
• all the SpO2 faces (1sr party for now) invest way too much real estate displaying the SpO2 data.
• Which is from last sleep, not changing during the day ... And currently unavailable for a few hours after you wake up (unless you reboot the watch)

If they uncouple SpO2 collection from the chosen face - and make it an option, I wouldn't even display it on my wrist, just use the app for it. It's more like sleep score.

So it would be nice if there was a way to "track and sync SpO2 but don't display on face" option.

[ThomasHineXYZ]

This would be sweet to have.