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natural-intelligence

Hosting on a vape

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The chip is marked PUYA C642F15, which wasn’t very helpful. I was pretty sure it was a PY32F002A, but after poking around with pyOCD, I noticed that the flash was 24k and we have 3k of RAM. The extra flash meant that it was more likely a PY32F002B, which is actually a very different chip.1

So here are the specs of a microcontroller so bad, it’s basically disposable:

24MHz Coretex M0+ 24KiB of Flash Storage 3KiB of Static RAM a few peripherals, none of which we will use.

You may look at those specs and think that it’s not much to work with. I don’t blame you, a 10y old phone can barely load google, and this is about 100x slower. I on the other hand see a blazingly fast web server.

bogdanthegeek.github.io/blog/projects/vapeserver/

Cómo medir el pulso cardíaco mediante Wi-FI con precisión clínica

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Un sistema bautizado como Pulse-Fi logra captar el ritmo cardíaco de una persona a hasta 3 metros de distancia usando únicamente señales Wi-Fi y algoritmos de aprendizaje automático. El prototipo funciona con hardware de muy bajo coste (ESP32 de 5–10 dólares o Raspberry Pi de ~30 dólares) y mantiene la precisión en 17 posturas y situaciones distintas...

blog.elhacker.net/2025/09/como-medir-pulso-cardiaco-mediante-wifi.html

How to ask questions

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Before You Ask

Before asking a technical question by e-mail, or in a newsgroup, or on a website chat board, do the following:

  1. Try to find an answer by searching the archives of the forum or mailing list you plan to post to.
  2. Try to find an answer by searching the Web.
  3. Try to find an answer by reading the manual.
  4. Try to find an answer by reading a FAQ.
  5. Try to find an answer by inspection or experimentation.
  6. Try to find an answer by asking a skilled friend.
  7. If you're a programmer, try to find an answer by reading the source code.