Heart Rate Measurement via WiFi, The DIY WayA few weeks back, we reported on a research group that figured out how to measure heartrate using perturbations in WiFi signals.
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Heart Rate Measurement via WiFi, The DIY Way
A few weeks back, we reported on a research group that figured out how to measure heartrate using perturbations in WiFi signals. [Nick Bild] was interested in this so-called “Pulse-Fi” technique, but noted the paper explaining it was behind a paywall. Thus, he worked to recreate the technology himself so he could publish the results openly for anyone eager to learn.
[Nick] paid for the research paper, and noted that it was short on a few of the finer details and didn’t come with any code or data from the original research team. He thus was left to figure out the finer details of how to measure heart rate via WiFi in his own way, though he believes his method is quite close to the original work.
The basic concept is simple enough. One ESP32 is set up to transmit a stream of Channel State Information packets to another ESP32, with a person standing in between. As the person’s heart beats, it changes the way the radio waves propagate from the transmitting unit to the receiver. These changes can be read from the packets, and processed to estimate the person’s heart rate. [Nick] explains the various data-massaging steps involved to go from this raw radio data to a usable heart rate readout.
It’s a great effort from [Nick] to recreate this research all on his own in his home lab. Files are on GitHub for the curious. If you’re eager to learn more about these innovative measurement techniques, you might like to read our prior reporting on the tech. Also, it’s worth remembering—don’t use your homebrew prototypes for any serious healthcare purposes.
youtube.com/embed/Cf6_PGuEiZY?…
Gli ultimi otto messaggi ricevuti dalla Federazione
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Giuli spende trenta milioni nostri per un Caravaggio....meloni urla anche stavolta?
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I enjoyed and appreciated reading this post.
"I realized almost immediately that GNU/Linux and FreeBSD were so similar they were completely different."
This right here.
My initial impression with #FreeBSD in 2006 was quite similar. Of course, #Linux back then was a much different beast than what it has evolved (mutated?) into today.
Had I not pursued Linux system administration as a career, I *probably* would have stuck with FreeBSD.
We can make all the technical comparisons between the two OSes all day long but what drove my interest and enthusiasm are (1) the documentation and (2) the community.
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@peacelink ma non sono riuscite ad evitare di sbavare mentre lo dicevano
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@stefano Don’t bother filing a bug report. They will act stupid. Probably they are stupid about it. They think it is a bug. Actually the author probably wrote a program he knew was not a solution to the problem but which he could do on deadline and which was good enough for his job at HP.
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@stefano Here is something new for you to be upset about, though, which affects everyone, Linux, BSD, illumos alike. I have been upset about it for over 20 years.
Read ‘man 5 fonts-conf’ or whatever your equivalent is. Read it carefully under ‘FONT MATCHING’. What it says is that a font is not chosen as you wished, but instead RANDOMLY. You are only LUCKY if you get the font you wished.
And if you experiment long enough you will find this is true.
Fontconfig is unfixable and must be scrapped.
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L'Ucraina ha sviluppato nuovi missili balistici FP-7, analoghi all'ATACMS, ma due volte meno costosi
I test si stanno muovendo verso una nuova fase, i missili saranno testati direttamente in attacchi in Russia
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E in omaggio la concessione decennale per l'uso di un pezzo di bosco demaniale.
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@quinta non solo lo fa, ma se ne vanta pure.
