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Various Projects Find Hidden SDR Capabilities in ESP32 Microcontrollers

288 points · 67 comments · nkw

  1. mallets · · focus · HN ↗
    So many $1 wireless ICs have a powerful "SDR", but will never be documented due to certification/compiliance/export-control reasons. The projects listed here rightly limited the scope to RX-only but Espressif might be forced to "patch" this away if arbitrary TX too is possible (or starts making headlines). Hope it doesn't come to that, more cheap options for RF-to-bits is always welcome.

    On a technical note, not much I can find about the signal quality. Phase noise, images, DC Offset, etc. Have to get my hands on one, ESP32-S31 seems promising.

    1. rasz · · focus · HN ↗
      >if arbitrary TX too is possible

      <a href="https:&#x2F;&#x2F;espargos.net&#x2F;espsdr&#x2F;" rel="nofollow">https:&#x2F;&#x2F;espargos.net&#x2F;espsdr&#x2F; straight up shows its an ADC&#x2F;DAC debug interface working both ways.

      1. mallets · · focus · HN ↗
        Shhhh. Just some AI hallucinations, nothing to see here.
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