Web API - sleep data Classic vs Stages?

[solarslurpie]

When/why does the fitbit decide to record classic instead of stages data?  Thank you.

[JohnFitbit]

Hi @solarslurpie,

Here are the factors that would determine whether or not your device records sleep stages or classic sleep data:

• If you slept in a position that prevented your device from getting a consistent heart-rate reading or wore it too loosely. For best results, wear your device higher on your wrist (about 2-3 finger widths above your wrist bone). The band should feel secure but not too tight.
• If you used the Begin Sleep Now option in the Fitbit app (instead of simply wearing your device to bed). For more information on automatic sleep tracking, see How do I track my sleep with my Fitbit device?
• If you slept for less than 3 hours.
• If your device’s battery is critically low.

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Source:  What should I know about Fitbit Sleep Stages?

I hope this helps. Let me know if you have any additional questions.

[mickjeon]

Hi @JohnFitbit,

I am also curious about the factors that would distinguish between sleep stages or classic data. I understand the factors you listed. But what do the factors imply? How many conditions are needed to meet and create which data?

Thank you

[Gordon-C]

Hi @mickjeon 

Typically, if any one of the conditions that were listed above were met, you could receive classic sleep data.

Gordon