The ESP32, An SDR In Itself
The ESP32, An SDR In Itself No comments by: Jenny List October 3, 2026 Title: Copy Short Link: Copy Perhaps the most famous of all the software-defined radio (SDR) receivers is the RTL-SDR, a digital TV receiver on which an undocumented feature was found. Perhaps other radio-enabled chips also have the same undocumented feature? It seems in the case of some members of the ESP32 family, they do.
- ▪The ESP32, An SDR In Itself No comments by: Jenny List October 3, 2026 Title: Copy Short Link: Copy Perhaps the most famous of all the software-defined radio (SDR) receivers is the RTL-SDR, a digital TV receiver on which an undocumented fea
- ▪Perhaps other radio-enabled chips also have the same undocumented feature?
- ▪It seems in the case of some members of the ESP32 family, they do.
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| Original publisher | Hackaday |
| Canonical URL | https://hackaday.com/2026/10/03/the-esp32-an-sdr-in-itself/ |
| Publication time | Sat, 03 Oct 2026 17:00:31 +0000 |
| Retrieval time | 2026-10-03T17:03:12.917Z |
| Last seen | 2026-10-03T17:03:12.917Z |
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| Cluster | bcheMkE26a66 · 1 stories |
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| Publisher visit | Yes — open original |
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Opening excerpt (first ~120 words) tap to expand
The ESP32, An SDR In Itself No comments by: Jenny List October 3, 2026 Title: Copy Short Link: Copy Perhaps the most famous of all the software-defined radio (SDR) receivers is the RTL-SDR, a digital TV receiver on which an undocumented feature was found. Perhaps other radio-enabled chips also have the same undocumented feature? It seems in the case of some members of the ESP32 family, they do. It’s a discovery made independently in two places, by Espargos, and a Reddit user by the name of h0m3us3r. What’s happening is that the undocumented mode taps the I/Q stream off before the WiFi modem, and this can be read and processed by SDR software on an external computer.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Hackaday.
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