MTR-WP-784240
NFC · WO-418 · TECH-014
OFFLINE FIELD DIAGNOSTICS
localLocal device session & evidence
Capture local NFC/M-Bus/optical state as evidence, compare it with cloud state and preserve divergence before syncing.
Demo only. Local diagnostics must use authorized field tooling and scoped technician permissions. Raw diagnostic evidence is retained; production keys are never exported.
captured
evidence://FS-DEMO-22/raw-nfc.bin
4
Cloud vs. local meter state
Local state may be newer than the cloud after communications failure.
Cloud valveopenTotal 418.22 m³
Local valveclosedTotal 418.47 m³
Local battery78%Config cfg-12
high
valve state
cloud: open · local: closed
warn
available water
cloud: 2.41 · local: 2.16
warn
total water
cloud: 418.22 · local: 418.47
warn
config version
cloud: cfg-11 · local: cfg-12
Field session lifecycle
1AuthenticateTechnician + work order + scoped action.
2Capture local stateRetain raw diagnostic payload and parsed fields.
3CompareNever assume cloud valve/balance is physical truth.
4SyncQueue append-safe evidence and explicit conflicts.