ruvnet/RuView v0.8.0-esp32

v0.8.0-esp32 — Wi-Fi 6 HE-LTF CSI on ESP32-C6 (242 tones, IDF v5.5.2 builds)

on GitHub

Headline: the C6 becomes the precision instrument of the fleet

All binaries in this release are built with ESP-IDF v5.5.2 — the first release where the ESP32-C6 delivers true HE-LTF CSI: 256 bins / 242 active HE20 tones per frame at 78.125 kHz tone spacing (4× the spectral density of any HT capture). Discovered and first measured by @stuinfla in #1005: the IDF v5.4 driver blob silently downconverted HE links to 64-subcarrier HT; v5.5.2 delivers the real thing. Independently replicated on a second rig before this release (84% of frames at 532 B / PPDU 0x01 HE-SU; WITNESS-LOG-110 §B1 now RESOLVED WITH MEASUREMENT from two rigs).

What's in the binaries

• esp32-csi-node-c6.bin + bootloader-c6 + partition-table-c6 — C6 4MB, HE-LTF capable out of the box on any 11ax 2.4 GHz AP (no toolchain or rebuild needed)
• esp32-csi-node.bin (S3 8MB) + bootloader + partition-table + ota_data_initial — hardware-validated on ESP32-S3 (HT format unchanged; S3 silicon is HT-only)
• esp32-csi-node-4mb.bin + partition-table-4mb — S3 4MB variant
• SHA256SUMS.txt for all artifacts

Firmware changes

• #1005 fix: c6_sync_espnow.c ESP-NOW send-callback guard now ESP_IDF_VERSION >= VAL(5,5,0) (Espressif backported the v6 signature to v5.5) — building from source with IDF 5.5.x works again
• ADR-061 fuzz-harness stubs for the #954 self-ping includes (un-breaks the fuzz CI broken since #985)

Host-side changes (required for HE frames — update your host before flashing C6 nodes!)

• sensing-server + CLI calibrate/room-watch parsers: n_subcarriers now read as u16 (256-bin frames previously decoded as zero subcarriers), corrected rssi/seq offsets (RSSI was always 0), PPDU type (byte 18) surfaced as a typed field
• Per-node grid gate: interleaved HT minority frames never mix into an HE baseline window
• HE-aware bandwidth classification; verbatim live HE/HT frames embedded as regression fixtures
• ADR-135 calibration: wifi-densepose calibrate --tier he20 consumes 242-tone baselines today

Validation

• C6: live bench capture, 84%/1,525 frames at 532 B HE-SU into an ADR-135 He20 baseline (600/600 windows)
• S3: v5.5.2 build flashed and streaming real CSI (148 B HT, correct PPDU)
• 765 host tests green; full CI green including the repaired fuzz layer

Credit: @stuinfla (#1005) for the discovery, measurement, and the build fix.

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