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Python client for the $20 Colmi R02 smart ring

tahnok.github.io

11–20 of 125 posts

Re: Python client for the $20 Colmi R02 smart ring

#11
This looks interesting - is there a comparable ring that also has a temperature sensor? It would be interesting to be able to determine if you're sick a day or two ahead like an Oura ring or Apple's new Vitals app for Apple Watch using an open source app.

Alternatively, does anyone know if it's possible with the sensors just in this ring?

Re: Python client for the $20 Colmi R02 smart ring

#14
post #5

At a quick glance this looks cool! I just have a hard time justifying things like this when the apple watch + iphone work so well. But i'm sure at some point the apple experience will get worse and push people to other OS like windows is

20$

1200$

I have an easier time justifying this

Re: Python client for the $20 Colmi R02 smart ring

#15
post #13

How accurate can the data of such a smart ring be or do other smart ring have so high margins?

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.

Re: Python client for the $20 Colmi R02 smart ring

#16
post #2

I couldn’t find it on the product page: any idea if this has a vibrating alarm? I’m in the market for something to wake me up without disturbing my partner

Wouldn't a watch do that? Ex. the https://pine64.com/product/pinetime-smartwatch-sealed/ is dirt cheap and its alarms just vibrate the watch.

Re: Python client for the $20 Colmi R02 smart ring

#17
post #5

At a quick glance this looks cool! I just have a hard time justifying things like this when the apple watch + iphone work so well. But i'm sure at some point the apple experience will get worse and push people to other OS like windows is

Here are few reasons that justify its existance.

* Different form factor

* Not tied to Apple Ecosystem.

* Price

* You can even use it independently (without phone).

Re: Python client for the $20 Colmi R02 smart ring

#19
post #15
post #13

How accurate can the data of such a smart ring be or do other smart ring have so high margins?

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.

That has also been my experience with this model. I’ve been using it for about a month now. I originally planned on trying to use the accelerometer data over Bluetooth to build a custom control input for Frame smart glasses, but I got busy and never got around to that. But I’ve been wearing it as a health tracker and the heart rate and sleep tracking seem pretty accurate relative to my Apple Watch, and the blood oxygen measurement is generally a couple percentage lower than my Apple Watch. I have no idea what the stress thing is even supposed to measure, it’s just a random number that doesn’t seem to have any correlation with real life and there’s no units or explanation.

I get about four days of battery life with all of the sensors turned up to maximum frequency, which is every 5 minutes at least for the heart rate. Surprisingly good for such a small lightweight device. I imagine it could go a lot longer if you turned down the sensors to a lower frequency. I found a good rhythm is to charge it when I take showers, that seems to be a good balance and it never comes close to dying. My Apple Watch on the other hand regularly dies before I go to bed, and I can’t wear it for sleep tracking because it can’t last that long.

I will never understand people that pay a monthly subscription to access basic local sensor information like this. Yet I see people wearing subscription-based smart rings all the time. I don’t get it.

Re: Python client for the $20 Colmi R02 smart ring

#20
post #18

Is there a similar ring with NFC? I have no use for the smart health thingies, which really look like a data driven health gimmicks to me. NFC on the other hand I could find hundreds of applications, from payment to access and transport cards.

I think you're onto something.

I would be ok with a watch too.

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