Charge 2 not recording sleep and activities properly, HR sensor not working

[Wendykav]

Hi my Fitbit all of a sudden isn't recording my sleep or excersize proper

y. I then noticed only 1 light on back flashing ?

Moderator edit: updated subject for clarity

[AlvaroFitbit]

@Wendykav I hope you're doing well! Sorry for the delay in my reply.

Let me help you with you Charge 2 not recording your activities and sleep and that the heart rate sensor lights aren't working as they should. For the sleep your device will start recording sleep after it detects an hour of inactivity. If you have a light sleep or move too much then this may difficult your sleep detection. Additionally you can try wearing your device on your non dominant hand to decrease the amount of movement it is subjected to. Finally you can restart your device. You can also manually log your sleep time. You can read more about sleep detection here.

Regarding activity detection the Charge 2 detects activities based on the motion on your arm. The automatic detection is a feature called SmartTrack. For example when using the elliptical machine make sure you have the moving bars so your device detects the motion and records the activity itself, once an Elliptical activity is saved on your account it should show on the Recent Exercise area. If your heart rate is high but there isn't much motion (yoga, weight lifting, etc.) then these activities will be difficult to be detected by your device. Still you can manually log your activity so you have a record on your account or use the activity mode on the device itself.

Finally regarding the heart rate green lights, I suggest you clean the back of your device with cotton and rubbing alcohol and restart it. Turn the heart rate off, save and sync then turn it on save and sync again. Also check these tips to improve the heart rate reading on your device.  

Let me know how it goes.