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TEL-01: P1 ingestion, with the derivation and the age the EMS owns

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A Belgian P1 meter publishes two UNSIGNED registers, not one signed figure.
Until now the add-on asked the installer to bridge that gap with a template
sensor, which put the sign convention of the whole control loop in a text box.
This moves it into the EMS: net = import - export, derived once, in one place,
with a test that fails if anyone inverts it.

Two transports behind one contract, chosen by `meter_source`: the HA WebSocket
subscribing to the DSMR integration's entities, and MQTT on a configurable
topic. Everything downstream reads P1Ingest, so switching is a config edit.
`meter_source: off` is the default and keeps the existing meter_entity path,
so no installed system changes until it opts in.

The other half is the timestamp. Every accepted sample is stamped at ingest
with a monotonic clock, `meter_max_age_s` is applied to it, and the age is
published as sensor.p1_sample_age_s for the ESP32's stale-input watchdog. That
entity is recomputed against the clock every second rather than only when a
telegram lands, because HA pushes state only on change: a meter frozen at a
constant reading emits nothing and looks, to anything watching the value,
exactly like a meter that has died. The age tells them apart.

Deliberately absent: any fallback to an inverter-side power figure. The
inverter's own AC power correlates 0.998 with battery power and 0.09 with the
real meter, so failing over to it means regulating against your own output.
A gap stays a gap - a reconnect emits no synthetic sample, and a rejected
telegram never resolves to 0 W or refreshes the timestamp.

Quarter-hour averages are time-weighted over clock-aligned blocks rather than
a mean of samples, so a cadence change cannot bias the capacity-tariff figure,
and only offtake is accumulated so a quarter of pure export averages to 0 kW.
Per-phase import is kept separately: on an unbalanced three-phase load the
phase sum and the connection net are different numbers, and only one of them
is billed.

test_p1.py: 99 checks, runnable with a bare interpreter and no meter. Includes
an end-to-end run of the HA transport against a fake Home Assistant websocket.

Stacked on SAFETY-04; nothing here touches control.py.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Du77usMj8XNKNFZGmUiWDa
This commit is contained in:
glenn schrooyen
2026-08-24 21:52:51 +02:00
co-authored by Claude Opus 5
parent 37bac79ad8
commit 147456c2a2
6 changed files with 1331 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
goodwe_controller/app/main.py
+59 -11
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@@ -39,6 +39,7 @@ from .control import Tuning, compute, maintenance_charge_floor, peak_at_risk
from .hass import HomeAssistant
from .maintenance import IDLE, MaintConfig, Maintenance
from .mqtt import MqttPublisher
from .p1 import P1Ingest, build_source
from . import web
OPTIONS_PATH = "/data/options.json"
@@ -86,6 +87,13 @@ class Controller:
store,
)
# P1 ingestion (TEL-01). `meter_source: off` keeps the original
# single-entity meter_entity path, so an existing install is unchanged
# until it opts in.
self.p1 = P1Ingest(phases=int(opts.get("meter_phases", 1)),
max_age_s=float(opts.get("meter_max_age_s", 30)))
self.p1_enabled = str(opts.get("meter_source", "off")) not in ("off", "")
# live state
self.auto = bool(store.data.get("auto", opts.get("auto_start", False)))
self.target = 0.0
@@ -117,8 +125,18 @@ class Controller:
# -- io ------------------------------------------------------------------
async def read_inputs(self) -> None:
o = self.o
self.grid = await self.hass.number(o.get("meter_entity", ""),
bool(o.get("meter_invert")))
if self.p1_enabled:
# ⚠️ P1 is the only authoritative measurement of what the utility
# sees (§5.1). When it is stale this is None, which falls into the
# existing "inputs missing -> command 0 W" path below. There is
# deliberately NO fallback to an inverter-side figure: the
# inverter's own AC power correlates 0.998 with battery power and
# 0.09 with the real meter, so a controller that failed over to it
# would be regulating against its own output.
self.grid = self.p1.net_w
else:
self.grid = await self.hass.number(o.get("meter_entity", ""),
bool(o.get("meter_invert")))
self.soc = await self.hass.number(o.get("soc_entity", ""))
self.batt = await self.hass.number(o.get("batt_entity", ""),
bool(o.get("batt_invert")))
@@ -309,6 +327,8 @@ class Controller:
"soc": self.soc,
"phase": self.maint.phase,
"status": "running" if self.auto else "stopped",
# Recomputed here, once a second, on purpose - see P1Ingest.
"p1_age": round(self.p1.published_age_s, 1),
})
async def shutdown(self) -> None:
@@ -322,11 +342,27 @@ class Controller:
def checks(self) -> list:
o = self.o
out = []
for label, value, entity in (
("grid power", self.grid, o.get("meter_entity")),
("battery SoC", self.soc, o.get("soc_entity")),
("battery power", self.batt, o.get("batt_entity")),
):
if self.p1_enabled:
age = self.p1.published_age_s
if self.p1.stale:
out.append({"ok": False, "warn": False,
"text": f"P1 meter ({o.get('meter_source')}): no reading for "
f"{age:.0f} s (limit {self.p1.max_age_s:.0f} s)"
+ (f" - last error: {self.p1.last_error}"
if self.p1.last_error else "")})
else:
out.append({"ok": True, "warn": False,
"text": f"P1 meter ({o.get('meter_source')}): {self.p1.net_w:g} W, "
f"{age:.0f} s old, {self.p1.samples} telegrams, "
f"{self.p1.parse_errors} rejected"})
rows = [("battery SoC", self.soc, o.get("soc_entity")),
("battery power", self.batt, o.get("batt_entity"))]
if not self.p1_enabled:
# In P1 mode the check above replaces this one; leaving both in
# would report "no entity configured" for a meter_entity that is
# correctly unused, i.e. a permanent false NOT READY.
rows.insert(0, ("grid power", self.grid, o.get("meter_entity")))
for label, value, entity in rows:
if not entity:
out.append({"ok": False, "warn": False, "text": f"{label}: no entity configured"})
elif value is None:
@@ -453,6 +489,7 @@ async def amain() -> None:
# observability, and the battery does not care. Caught broadly and on
# purpose: this crashed the add-on once already (paho 1.x vs 2.x) and
# took the control loop down with it.
broker = None
try:
broker = await hass.mqtt_service()
pub = MqttPublisher(
@@ -480,13 +517,24 @@ async def amain() -> None:
with contextlib.suppress(NotImplementedError):
loop.add_signal_handler(sig, stop.set)
task = asyncio.create_task(controller.run_control())
tasks = [asyncio.create_task(controller.run_control())]
# P1 ingestion runs as its own long-lived task. ⚠️ It must not be driven
# off the control loop: telegrams arrive every ~5 s and the loop would
# decimate them, so the 15-minute average - the capacity-tariff billing
# unit - would be computed from a fraction of the data.
p1_source = build_source(opts, controller.p1, session, broker)
if p1_source is not None:
tasks.append(asyncio.create_task(p1_source.run()))
await stop.wait()
await controller.shutdown()
task.cancel()
with contextlib.suppress(asyncio.CancelledError):
await task
for task in tasks:
task.cancel()
for task in tasks:
with contextlib.suppress(asyncio.CancelledError):
await task
await runner.cleanup()
_LOG.info("stopped")