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Only had the new 255 for a week but last night it failed to record any sleep data or HRV.

Checking the settings the record HRV had reset to default off - is it likely this will fix the no sleep recording issue? Anyone had the same?

0 6592637 over 3 years ago

I have had the same issue this morning, when I woke up no sleep data were recorded. Did you solved it out?

Thanks!

0 zabaki over 3 years ago

Ive found it happening to me once or twice as well. but then I realised that I had a activity that I hadn't ended, which prevented the watch from measuring sleep etc. might that have been the issue?

0 6592637 over 3 years ago in reply to zabaki

Hi, thanks a lot for your replay. Yes it cold be because yesterday a breathing activity was suggested by the watch and if I remember well, I put it on hold.

I'll try to see if all the activity are ended.

Thanks again!

Edo