Unattended Cabinet Presence Witness: Someone Is at That Rack
Records that somebody was standing at a particular rack, outside the hours they should have been.
Contested Space · Contested capability
Latent emits a reading. It does not switch cameras, unlock cages, cut power or open a ticket. Your VMS, PoE switch or access controller does that, on your side of the boundary. A Latent blueprint contains no executable code, no remote URLs and no device secrets — by schema, not by policy.
No face, no plate, no MAC, no device identity, no payload. A movement signature is a shape moving through a room, not a person. Nothing stored here resolves to an individual.
This witnesses a person at the cabinet, never the cabinet opening. Presence is CSI variance; it does not see a door. The door event belongs to rack-tamper-geometry-door-panel-blanking.
Across Camera Shield Jam the mesh and the wake never fires. Two people moving together read as one disturbance. Re-rack a row and the fade map is wrong until you recalibrate.
Each node mints its own key over USB, in your hand. Physical possession is the root authority: a device that cannot prove physical presence is refused enrollment outright. A cloud pairing PIN is a weaker ownership claim and is never treated as liveness.
Every reading is attributable to a device id, profile id, hardware id and firmware version recorded at install and verified by mutual HMAC-SHA256 proof over an LFW1 nonce exchange. A node whose proof did not verify is marked untrusted, not merely offline.
Completing an installation is a high-risk action. It requires your explicit browser approval, an approval snapshot that still matches, an idempotency key, and heartbeats less than three minutes old. There is no silent commissioning.
How enrollment worksProperties you can map to your own controls
These are properties, not certifications. Latent does not assert compliance with any framework on your behalf.
Mapped to a shared offline runtime family and usable with a recording or compatible ESP32 CSI stream.
Published physics or adjacent results support the hypothesis; capability-specific product and site validation are still required.
Calibrated motion and presence score from CSI variance and change statistics.
No compatible ESP32 stream is connected. Use the bundled Camera Shield recording; it demonstrates the shared Presence runtime, not independent proof of this capability.
Intended capability
This describes the intended outcome. Readiness is shared-family mapped, evidence is class B, and a catalog mapping or recording is not proof of this outcome at a real site.
Solution blueprint
This exact kit is one of 191 first-class designs. It includes geometry, objects, nodes, wording, scenarios, installation, limitations, and catalog-bound readiness.
No rendered revision is available yet.
Bundled recording
This is one recorded vertical scenario. It is not separate validation of every capability in the catalog.
A person standing at a rack face is the mmWave radar's design case: a static target whose torso and limb micro-motion keeps returning 24 GHz energy in the aisle-aimed cone for as long as they stand there, however still they hold. The same body occupies the Fresnel volume of the CSI links that cross that aisle position, producing amplitude variance whose link pattern says which cabinet — the radar carries the hold and the mesh carries the address. The claim stays bounded to 'a body at this rack position', which is exactly what the two observables jointly support.
Radar static-target energy on the aisle-aimed cone (the hold) + per-link CSI amplitude variance and low-velocity Doppler on aisle-crossing links (the address) -> adaptive PCA baseline against the cabinet zone's own quiet window with a mechanical-rhythm term -> presence verdict with dwell hysteresis, sustained by the radar through motionless intervals -> zone attribution to the named cabinet object in the layout -> interval row joined against the change calendar on a host.
This is a capability design path. Components may be shared with other catalog entries; it is not presented as a unique algorithm.
Presence detection is class A in open rooms; the new claim is per-cabinet zone attribution in a metal-dense aisle. Own-hardware: eight nodes on one rack row, a person standing at each of 12 cabinets for 90 s in rotation, report per-cabinet attribution accuracy and confusion with adjacent cabinets; 14 nights of empty baseline with plant cycling for the false-presence rate.
'Cabinet Witness' — a change-window cross-check for the colo security lead, sold as an attendance record at named cabinets and explicitly not as a door sensor, which is the neighbouring entry's job. Plus tier: the aisle carries an aimed mmWave radar, because the person this entry exists to witness is the one holding still.
A quiet reading is not an all-clear. If nodes are stale, degraded or jammed, this runtime says so explicitly. It never infers safety from missing data.