A fourth meter_source, `homewizard_local`, polling a HomeWizard P1's own
local API (GET /api/v1/data) instead of watching an HA entity.
The point is the age sensor. sensor.p1_sample_age_s is FW-01's watchdog
input, and on every transport we had it measured "time since the value
CHANGED", not "time since the meter REPORTED". Home Assistant offers
nothing better: a repeated reading emits no state_changed, advances
last_reported on neither serialiser, and state_reported cannot be
subscribed to at all. Measured twice - 70 s of a frozen meter on the
ENV-01 rig, and ten repeated readings against the live house. Our own
capture of this house's meter goes 42.2 s and 97.0 s between changes,
both past the default meter_max_age_s of 30, so the age sensor would
have commanded 0 W on a perfectly healthy meter.
Here every HTTP response is an arrival. The meter answered, now, with
its current reading; whether the number moved is not consulted. Five
identical readings are five arrivals.
Reuses TEL-01's pipeline rather than restructuring it: same split_signed
sign convention as ha_signed, same make_sample, same ingest stamping,
meter_max_age_s, clock-recomputed age, plausibility bounds and the §20
unsigned-decode rejection. A failed or timed-out poll submits nothing,
so it is a missing reading - never 0 W - and does not reset the age.
meter_poll_s (default 5 s, the meter's own rate) is checked against
meter_max_age_s once at startup, like the ha_signed entity ids.
⚠️ An arrival stamp cannot see a FROZEN meter, and no arrival detector
can - one answering 200 OK with a stale number is arriving. The local
API does expose what HA never had (the total_power_*_kwh registers stop
advancing) and the transport tracks it as `unchanged_s`, but it is
deliberately not folded into the age and not thresholded: this
controller regulates grid toward ~0 W, and at a converged -10 W the
export register needs six minutes to move by its 1 Wh resolution while
the power figure legitimately repeats. Thresholding that would rebuild
the false-trip limit cycle at the exact operating point we aim for.
test_p1.py 179 -> 236 checks. Still defaults to off.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Du77usMj8XNKNFZGmUiWDa
