Getting simplified sleep instead of Sleep Stages.

[LondonSi72]

At least once or twice a week I get simplified sleep data rather than sleep stages. I rarely let the Charge 2 battery level get below 20/25% so I don’t think it’s critically low, and I get heart rate data all night, so it’s clearly being worn correctly for the sensor to work. 

Anybody else notice this / got a fix for this?

Thanks!

Moderator Edit: Clarified Subject.

[MarcoGFitbit]

Hello @LondonSi72, have a warm welcome to the Fitbit Community, it's great to have you on board. 

I appreciate your participation in the Forums and for sharing your experience with us. Please note that 

the Fitbit app currently has in-app error notifications that provide an explanation for why you aren't receiving Sleep Stages on any given night. Keep in mind that not only the heart rate is taken in account when calculating Sleep Stages, the error messages are the following:

1. We need more than 3 hours of sleep to reliably calculate your sleep stages. Learn more
2. Your tracker couldn't get a consistent heart rate reading while you slept. Learn more 
3. We couldn’t generate sleep stages for this sleep. Please try again tomorrow. Learn more

When you tap on Learn more, you will be able to get more information about why your tracker didn't record sleep stages. Additionally, I'd like to suggest the following:

• For any of the nights you were expecting to see Sleep Stages, did you ever click on the "Begin Sleep Now" or "Add Sleep Log" functions within the Fitbit App?
  • This is important to note because your tracker uses auto-detection to track Sleep Stages; so there's no need to try and remember to click on anything before falling asleep! 
• Do you have at least 3 consecutive hours of sleep?
  • This is important to note because you typically won't see sleep stages if you are waking up multiple times through out the night or taking short naps.
• Your tracker's battery isn't at a critically low level prior to falling asleep.
• Your device is tracking and syncing heart rate data.
  • This is important because Sleep Stages uses a combination of your movement and heart-rate patterns. 
• Your Fitbit App is updated to the latest version.

I hope this can be helpful, give it a try and keep me posted in case you need anything else.

[LondonSi72]

Hi MarcoG,

Thanks for your reply. I did see the error message. It says the Fitbit couldn’t get a consistent heart rate. The thing is - the heart rate log for the same period I was sleeping has no gaps at all, suggesting there was no problem reading the sensor. Does the Fitbit show heart rate readings it has calculated for periods it can’t read my actual heart rate? 

It’s just inconsistent. 

Thanks,

Si