what the rig proved about the age sensor
Review findings 1, 3, 5 and 6. Finding 2 is deliberately untouched - it is
its own ticket.
3. `built` was rebound at test_p1.py:816 by `built = build_source(...)`,
silently disarming the build() wrapper for anything appended below it.
Renamed to `sel`. Reproduced the reviewer's failure before fixing:
appending a check that calls built() after that line gives
`TypeError: 'HaSignedSource' object is not callable` and aborts at 163 of
180; with the rename the same probe reaches 180 and passes.
5. DOCS.md now states the "length must equal meter_phases" constraint that
config.yaml already carried, plus what leaving the list empty actually
costs: on the surveyed reading the phases carry 2769 W of import while the
connection nets 187 W, so the tariff quantity is understated ~15x.
6. build_source now checks the ha_signed wiring once at startup instead of
once per telegram: a blank p1_net_entity, or a phase list whose length
disagrees with meter_phases, logs an error and disables ingestion. Both
otherwise fail in the single way indistinguishable from a healthy source
nobody has fed yet - no samples, a climbing age, the watchdog holding the
battery at 0 W, and nothing in the log.
1. THE AGE SENSOR. Measured on the ENV-01 rig against the real HomeWizard
integration, meter frozen via hwsim's `?fault=freeze` seam (cleared in a
finally:, rig verified restored):
- websocket state_changed for the meter over 70 s : 0
- last_reported advanced (REST serialiser) : no
- last_reported advanced (websocket serialiser) : no
- subscribe_events(state_reported) : rejected,
"Event filter is required for event state_reported"
So Home Assistant exposes NO arrival signal for a repeated reading, and
the proposed fix - stamp from last_reported via subscribe_entities - is
not available. subscribe_entities listens only to EVENT_STATE_CHANGED, and
as_compressed_state carries no last_reported at all.
The age is therefore "time since the value changed", which on ha_dsmr is
mostly harmless (a telegram moves several entities) and on ha_signed is
not: one entity means a healthy meter under a flat load is
indistinguishable from a dead one. Recorded loudly in DOCS.md, in the
HaSignedSource docstring and in the CHANGELOG, with the measured 42.2 s
and 97.0 s gaps from our own capture.
meter_max_age_s is deliberately NOT widened. The two conditions produce an
identical signal, so a larger number does not separate them - it only
chooses which of the two errors you get, and it would disarm the watchdog
for a genuinely dead meter as well. The honest fix is an arrival stamp the
meter itself provides.
test_p1.py: 174 -> 179 checks, all green. Other three suites unchanged.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Du77usMj8XNKNFZGmUiWDa
