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Some ESP32 chips capture raw SDR samples at up to 80 MS/s

rtl-sdr.com Editor score 7/10

Several ESP32 models can capture raw IQ samples across specified frequency bands, but most export only snapshots; the ESP32-S31 can stream at up to 16 MS/s over Gigabit Ethernet. The discovery illustrates both hidden hardware capability and its practical limits.

What: - Several ESP32 chips can capture raw IQ baseband samples, turning them into internal SDRs across the frequency ranges described in the excerpt.
How: - Most export only snapshots; the ESP32-S31 can stream continuously at up to 16 MS/s over Gigabit Ethernet, and another setup uses an FPGA USB3 front end.
Why it matters: - The discovery expands embedded radio uses, while output limits distinguish snapshot spectrum analysis from continuous demodulation.

An FPGA front end streams raw IQ data from an ESP32-S3 to a PC. Sketched from the article's own text.

Read on rtl-sdr.com → Hacker News · 63 comments

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