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SENSE&VALUE
Seven-layer architecture

One data spine. Two products: operations and valuation.

Every layer below is a real engineering surface with its own protocols, contracts, and failure modes. The stack is designed so operations pays for the sensors, and valuation emerges as a signed by-product of data we were already paid to collect.

End-to-end flow

Cumulative flow across all seven layers

L-0Field sensingInputs
Physical phenomena: vibration, tilt, voltage, current, water, CO₂, temperature, motion.
Process
On-node ADC sampling → thresholded encoding → LoRaWAN uplink; gateway buffers on WAN loss.
Outputs
Compact binary frames tagged with devEUI, timestamp, and RSSI/SNR — ready for decoding.
L-1Ingestion & market da…Inputs
LoRaWAN frames from gateways + nightly market-data files and APIs.
Process
Decode → validate → dedupe → insert into hypertable; ETL normalises leases and comps onto property_id.
Outputs
Unified time-series rows: readings, leases, transactions, comparables.
L-2Asset & twin modelInputs
Component catalogue, documents, maintenance history, incoming readings.
Process
Map readings to components → apply subsystem weights → compute per-subsystem and composite BHI.
Outputs
Versioned BHI score with subsystem breakdown and confidence flags.
L-3Valuation engineInputs
BHI · NOI (measured) · comparables · cost baseline.
Process
Run three estimators independently → weight by data quality → blend → emit CI.
Outputs
Valuation + confidence interval + explainable contribution breakdown.
L-4Trust & complianceInputs
Readings, computed scores, valuation snapshots.
Process
Hash → batch → Merkle root → anchor → valuer signs.
Outputs
Signed, anchored report with verifiable hash path.
L-5ApplicationsInputs
User role · organisation · query parameters.
Process
RLS view materialises role-appropriate slice → UI composes KPIs.
Outputs
Role-scoped dashboard, alerts, exports, and signed reports.
L-6Roll-outInputs
Design-partner buildings and pilot KPIs.
Process
Instrument → measure → publish · widen coverage each phase.
Outputs
Case evidence, portfolio benchmarks, open signed city index.
InputsProcessOutputsTap a row to open its layer
100%
L-0

Field sensing

Per-building kit: structural, MEP, power quality, water, environment, anonymous occupancy — over LoRaWAN with edge-buffered gateways.

Gateway · ChirpStackAccelerometerTilt / driftPower qualityLeak / waterCO₂ · RH · TPIR occupancyLoRaWAN Class A · 0.1–1 Hz · ≤300 ch/tower
100%

A pilot tower carries up to ~300 measurement channels distributed across floors and risers. Structural drift is captured by MEMS accelerometers and dual-axis tilt sensors mounted on core columns and slab edges. MEP health comes from three-phase power-quality meters on switchgear (voltage sags, harmonics, imbalance) plus differential-pressure and vibration probes on chillers and pumps. Envelope and safety are covered by leak ropes on wet risers, CO₂/RH/T probes on AHUs, and anonymous PIR occupancy pucks — no cameras, no PII. Every node is battery-powered (5–8 year design life), LoRaWAN Class A, and buffers up to 24 h locally so a rooftop gateway outage never loses readings.

Specifications
  • Protocol: LoRaWAN 1.0.4 · Class A · EU868 / AS923
  • Cadence: 0.1–1 Hz uplink · adaptive data rate
  • Payload: 8–51 B compact binary · decoded at gateway
  • Density cap: ≤300 channels per tower (pilot)
  • Enclosure: IP54–IP66 · retrofit-friendly mounts
  • Battery: 5–8 y typical · low-power sleep between reports
Inputs

Physical phenomena: vibration, tilt, voltage, current, water, CO₂, temperature, motion.

Process

On-node ADC sampling → thresholded encoding → LoRaWAN uplink; gateway buffers on WAN loss.

Outputs

Compact binary frames tagged with devEUI, timestamp, and RSSI/SNR — ready for decoding.

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