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Python client for the $20 Colmi R02 smart ring

(tahnok.github.io)
353 points tahnok | 4 comments | 14 Oct 24 01:06 UTC | HN request time: 0.001s | source
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croes ◴[14 Oct 24 04:38 UTC] No.41834241[source]▶
How accurate can the data of such a smart ring be or do other smart ring have so high margins?
replies(1): >>41834288 #
bhaney ◴[14 Oct 24 04:47 UTC] No.41834288[source]▶
From the little bit of research I just did before buying one, most people are reporting that compared to their more expensive trackers, the heart rate, accelerometer, and sleep tracking functionality are all pretty accurate (good sleep tracking being dependent on a high sampling rate, which decreases battery life), but the blood oxygen and "stress" reporting is uselessly inaccurate.
replies(2): >>41834605 #>>41836195 #
1. stavros ◴[14 Oct 24 10:38 UTC] No.41836195[source]▶
I tried blood oxygen and the readings were the same as my pulse oximeter (though it always shows 98%, so I haven't managed to test any other value), but my sleep reporting with the ring would regularly be three or four hours longer than I actually slept, making it useless.
replies(1): >>41836615 #
2. alwayslikethis ◴[14 Oct 24 11:45 UTC] No.41836615[source]▶
> test any other value

Try this:

Hyperventilate for a minute or two. Then, make a full exhale and hold it. You should be able to hold your breath for longer than you normally can and during this time you should see the value drop a bit. Be sure to inhale before you start getting dizzy or faint. (Note: do not do this under water)

replies(2): >>41836799 #>>41837162 #
3. stavros ◴[14 Oct 24 12:14 UTC] No.41836799[source]▶
Oh interesting, thank you, I'll try that.
4. HumblyTossed ◴[14 Oct 24 13:08 UTC] No.41837162[source]▶
> (Note: do not do this under water)

Or while operating heavy machinery.