81e848ef2a
ADR-121 (Normal Mode) gave us distance and a passable breathing estimate but couldn't see the heartbeat — cardiac chest displacement (~0.5 mm) is well below the cm quantisation of `distance:NNN`. Engineering Mode streams per-range-gate energy at the same 6 Hz cadence (15 motion + 15 micromotion gates, u32 LE each). The micromotion bin at the target's distance carries enough cardiac modulation for FFT peak-detection in the 0.8-2.0 Hz band. Live result, seated operator ~1.5 m from the radar: 🫁 📡 13.0 BPM · 37% норма 12-20 💓 📡 76 BPM · 63% норма 60-100 Implementation: - Send enable-config → set-mode(0x04) → disable-config on startup; fall back to Normal-Mode ASCII parsing if the sequence fails. - Binary frame parser: F4 F3 F2 F1 | len(2) | 0x01 | dist(2) | 8z | motion[15]×u32 LE | micro[15]×u32 LE | F8 F7 F6 F5. Gate the ASCII line-drain on the engineering_mode flag — first cut ran both unconditionally and destroyed 80% of partial frames mid-buffer. - Target-gate selection: distance-bracketed gate first, mid-range micro-peak fallback, gate 1 default. Per-gate ring buffer of log-energies feeds a Hann + radix-2 FFT. - /api/v1/mmwave/vitals now returns real `heart_rate_bpm`. - raw.html: 💓 📡 pill now shows real values (no more "n/a" placeholder). - New probe script v2/scripts/probe_ld2402_engineering.py used to reverse-engineer the wire format; kept in tree for next time. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> |
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| examples | ||
| patches/ruvector-crv | ||
| scripts | ||
| Cargo.lock | ||
| Cargo.toml | ||