ESPARGOS/esp-sdr
ESP-SDR uses the undocumented raw I/Q capture functionality of ESP32 family chips to turn them into (low-duty-cycle) Software Defined Radios
About the project
Firmware that turns the ESP32's built-in Wi-Fi radio into a software-defined radio (SDR): it captures raw I/Q samples and sends them to a computer over USB/UART for spectrum analysis. Supports most ESP32 chips, with 5 GHz reception on the ESP32-C5.
Useful for
- Tune the ESP32 to a frequency and bandwidth via FREQ/BANDWIDTH and capture a spectrum snapshot with CAP16 for signal analysis.
- Write a Python client that reads the binary I/Q stream over UART and verifies the packet CRC32.
- Scan the 2400-2483.5 MHz band with several ESP32 boards to study Wi-Fi channel occupancy.
README summarized by DeepSeek V4.1 Flash. Details may be inaccurate.
Why it’s trending
- 33 stars so far today, about 66 expected by the end of the day.
- The spike has held for 3 days in a row — not a one-off blip.
- The repository is 2 days old and already has 101 stars. With less than two weeks of history, there's no usual pace to compare the spike against yet.
- Top new repositories this week: #157.
- Hacker News: “ESP-SDR: Raw IQ Capture with Espressif's ESP32 Chips” — 6 points, 1 day ago.
- About 7 forks a day — people are taking the code.
- Recent forks include notable developers: @mildsunrise (571 followers).
Stars per day
Bars are daily stars, the line is the usual pace. Red marks spike days.
Numbers
- Total stars
- 101
- Today
- 33 · ≈ 66 by evening
- Forks
- 12
- Issues and pull requests
- 0
- Watchers
- 0
- Language
- C
- Created
- September 28, 2026
- Last push
- September 29, 2026
Star trust
Growth looks organic: forks and discussion are in line with active projects, and stars arrive unevenly, the way people give them.
These are heuristics, not a verdict: we judge by the repository’s behavior, not by a list of stargazers.
Hacker News discussions
- ESP-SDR: Raw IQ Capture with Espressif's ESP32 Chips6 points, September 28, 2026
Spotted in
- September 30, 2026Top new repositories this week: #157
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README badge
Paste it into your README — the badge shows the current magnitude and links to this page.
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