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Various Projects Find Hidden SDR Capabilities in ESP32 Microcontrollers

288 points · 67 comments · nkw

  1. 1e1a · · focus · HN ↗
    This is absolutely fantastic! Testing with an esp32-s3, it looks like the tuning range is roughly 2.2GHz to 2.8Ghz, which covers far more than just WiFi. It should be possible to receive and demodulate S-band satellite downlinks using this < $2 chip with a dish.
    1. jcims · · focus · HN ↗
      Not sure if it helps with the S3 specifically but they found a way to tinker with the LO to allow fixed tuning to a lower range - <a href="https:&#x2F;&#x2F;github.com&#x2F;h0m3us3r&#x2F;eSpDR&#x2F;blob&#x2F;main&#x2F;docs&#x2F;LO-EXTENSION.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;h0m3us3r&#x2F;eSpDR&#x2F;blob&#x2F;main&#x2F;docs&#x2F;LO-EXTENSIO...
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