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hardwar

feitcsi

Also known as: FeitCSI, FeitCSI tool, FeitCSI extractor, AX210 FeitCSI

Description

FeitCSI (KuskoSoft, 2023+) is the first free and open-source tool to extract and inject CSI for all 802.11 formats (a/g/n/ac/ax) and all bandwidths (20/40/80/160 MHz) on commodity Intel AX200 / AX210 NICs. It fills the gap left by the discontinued intel-5300 and the heavyweight, historically-closed picoscenes: it gives the AX200/AX210 most of PicoScenes' Wi-Fi 6 capability without the licensing or footprint, which makes it the natural extractor for new (2026-era) CSI studies on Wi-Fi 6 hardware. The lab's own deployment plan already targets it — see EXP-002 CSI Model Drift Measurement Over Time ("Raspberry Pi 5 + Intel AX210, CSI extraction via FeitCSI"). Tracked here as Hardware because, like the other extractors, it is a specific chip + patched-driver combination.

Specs / capabilities

  • 802.11a/g/n/ac/ax CSI extraction on Intel AX200 / AX210
  • 2.4 / 5 / 6 GHz bands; bandwidths up to 160 MHz
  • Up to 512 subcarriers, 16-bit signed integer precision per component (finer than Intel 5300's 8-bit, Atheros' 10-bit)
  • Frame injection supported (not just passive capture)
  • Fine Timing Measurement (FTM) support — useful for ranging / ToF work (cf. W8 localisation)
  • CLI for local control; UDP socket interface for remote control from external tools (e.g. MATLAB)
  • Patched iwlwifi driver + user-space tool; Linux

Tooling

  • FeitCSI: https://feitcsi.kuskosoft.com/ · source: https://github.com/KuskoSoft/FeitCSI
  • Parsed by CSIKit (one Python interface across Atheros / Intel 5300 / Nexmon / ESP32 / FeitCSI / PicoScenes formats)
  • Free/open-source alternative to picoscenes for AX200/AX210; complements (does not replace) csi-extractor

Used by (papers / context)

  • The WST tutorial's reproducibility lineage and guarino2026_e72c ↗ track FeitCSI / AX-CSI / PicoScenes as the live 802.11ax extraction options.
  • Related: AX-CSI (Gringoli et al., 2021) — the earlier 802.11ax CSI-extraction effort on Intel AX NICs; FeitCSI is the open-source, injection-capable successor in the same niche.
  • Lab use: planned AX210 extractor for the BLE-anchored CSI experiments (EXP-002 CSI Model Drift Measurement Over Time, and the EXP-F series).

Notes

  • WS501 Week 3 (Collecting CSI off commodity hardware) compares FeitCSI against Intel 5300 / Atheros / Nexmon / PicoScenes as workflows — what each patches, whether it injects, its Wi-Fi generation, and its on-disk format. For new Wi-Fi 6 work the live choices are FeitCSI (free, open) and PicoScenes (heavier, multi-NIC).