Interface ErrorLogEntry

When the error occurred (ISO 8601, as the wire reported it).

The instant of at normalized to epoch milliseconds — each dialect anchors its own wall-clock discipline at its boundary. Home at is UTC wall clock, so its instant is exact. Classic at is BUILDING-local wall clock anchored in the client's configured timezone (ClassicAPIConfig.timezone, the host's zone when unset): exact only insofar as that timezone is the building's — a building in another zone skews the instant by the zone delta, and the recorded worldwide skew reaches ±14 h, so day-scale reasoning stays safe where sub-hour reasoning does not. null when the wire's at cannot be parsed (such entries are deliberately kept).

When the error cleared (Home only, while uncleared it is absent).

The instant of clearedAt normalized to epoch milliseconds — present exactly where clearedAt is (Home, once cleared), anchored in UTC like the Home discipline of atEpochMs; null when the wire's stamp cannot be parsed.

Wire error code (Home only — the Classic wire has none).

Identifier of the device that reported the error — numeric on Classic, a GUID string on Home.

Human-readable message: always present on Classic entries, only when the wire carries a reason on Home.