Turned an ESP32-S31’s Wi-Fi radio into a streaming spectrum analyzer

Barnabus Notes@BarnabusBull on X · Oct 6

ESP32 development boards5 mods on co.build

Midjourney charges you a subscription for pixels, this project gives you raw RF spectrum off a $3 chip for free

someone pointed an ESP32-S31 at an LTE signal sitting at 2.63 GHz and streamed it live over Ethernet at 40 MSa/s straight into Gqrx.

no external SDR dongle, no RTL-SDR, just the Wi-Fi radio already soldered onto the board, repurposed to capture raw I/Q samples it was never designed to expose.

ESP-SDR on co.build Open on GitHub View post on X

Code: ESPARGOS/esp-sdr
On X: 7 likes
Views: 554