goodwe-addon/goodwe_controller/CHANGELOG.md

Changelog

0.3.0

SAFETY-04. The control law's integrator is now an explicit accumulator, bounded independently of the output clamp instead of inheriting whatever headroom the clamp happened to leave. It also freezes while the inverter is not tracking, rather than continuing to wind up against a command nothing is acting on. integrator_max_w (default 0) governs the bound; 0 means "follow max_w", which is the existing behaviour.

Behaviour is unchanged at the defaults - a 4,928-case equivalence sweep against the previous control law confirms it decides identically at integrator_max_w: 0.

TEL-01. P1 meter ingestion, so a Belgian P1's two unsigned registers (consumption, injection) no longer need a hand-written signed template sensor: the subtraction moves into the add-on, done once and tested. Two transports, chosen with the new meter_source option: ha_dsmr subscribes to the DSMR integration over the HA WebSocket, mqtt_p1 reads a topic. Defaults to off, which keeps the existing meter_entity path untouched - nothing changes for an install that does not opt in.

Enabling it publishes sensor.p1_sample_age_s: seconds since the newest accepted telegram, recomputed against the clock and republished roughly once a second rather than only when a telegram lands. That is deliberate - Home Assistant only pushes a state on change, so a meter sitting at a genuinely constant reading would otherwise look identical to a dead one. Watching the age instead means a frozen meter shows a climbing age, not a flat line. The firmware watchdog subscribes to this exact entity id.

Known limits, both already in DOCS.md: on mqtt_p1, a bridge stuck republishing its last telegram still "arrives", so the age cannot detect that particular failure - prefer ha_dsmr where both are available. And a dead P1 meter takes 45 s to reach 0 W commanded (30 s for meter_max_age_s to call the reading stale, then 15 s of stale_input_s on top), which is meter_max_age_s and stale_input_s stacking, not either one alone.

0.2.1

target_grid_w (default -10 W): what the meter should rest at. The deadband holds any resting point inside it indefinitely, and the meter bills import and export on separate registers, so resting at +14 W import costs 0.34 kWh/day with the loop behaving perfectly. Biasing the target slightly negative moves that residue onto the export register. Configurable in the Configuration tab; see DOCS.md for the trade-off table.

Behaviour is unchanged at target_grid_w: 0.

0.2.0

Precedence between strategies is now a first-class object instead of an if/else ladder, ahead of there being more than three of them.

Every strategy returns a CLAIM each cycle - set ("I want X") or limit ("the result must stay within these bounds") - and arbiter.py resolves them by one rule:

1. Highest-priority set wins; no claim at all means 0 W.
2. Then every limit whose priority is >= that set's priority applies, most restrictive first.
3. Contradictory limits are a BUG: command 0 W and say so.

Clause 2 is why "money outranks maintenance" is now a consequence of the priorities rather than a special case in a Jinja template: the maintenance charge-only limit binds the loop, but will not bind a higher-priority peak shaving claim when one exists.

• Maintenance shaping (charge-only, cheap-window floor) moved out of the control law. control.py is once again only a controller that tracks the meter.
• The loop computes from the ARBITER's last output, not its own last wish. If something outranked it, that is what the hardware actually did, and tracking anything else makes it jump when it regains control.
• Every decision is explainable: "loop -> 0 W, limited by maintenance (charge-only)" now appears in the UI and the log, instead of a bare number.
• Safety limits (device rating, supervised max_w) bind every strategy including the highest, and are still enforced a second time at the point of writing.

0.1.6

Findings from installing this on a live system, replacing a working YAML implementation. Every one of these was silent - the add-on looked healthy while being completely unable to do its job.

• run.sh must use #!/usr/bin/with-contenv sh. The HA base images run s6-overlay, which starts services with a SANITISED environment. With a plain shebang, SUPERVISOR_TOKEN is simply absent and every Home Assistant call returns 401 - while homeassistant_api: true makes the permissions look correctly granted. Startup now logs the token length and probes the Core API, so the next person sees it in one line.
• Bump version: for every change. Supervisor keys the built image by version, so editing source and rebuilding silently reuses the old image. Two fixes appeared not to work because of this.
• Dependencies come from apk, not pip. Alpine is musl and there are no musl wheels for aiohttp; pip would compile it on the client's Pi.
• paho-mqtt 1.x and 2.x are both supported. Alpine ships 1.x, which has no CallbackAPIVersion; that raised and took the whole add-on down with it.
• MQTT can no longer take down control. Publisher construction is wrapped - observability must never stop the controller.
• MQTT discovery is published from on_connect. paho drops QoS-0 publishes issued before the CONNACK, so announcing straight after connect() published nothing at all while logging "MQTT connected".
• Repeated failures log at most once a minute. The control loop retries every second; unthrottled warnings rolled the log buffer and destroyed the startup diagnostics needed to debug the 401 above.
• auto_start works. The store's defaults supplied auto: False, so the fallback to the option could never fire.

Known issue: after deleting the MQTT entities from the registry during development, Home Assistant would not re-adopt them from retained discovery - not even after clearing the retained topics and reconnecting. The add-on publishes correct discovery and live state (verified on the broker); this is an HA-side adoption problem and affects status entities only, never control.

0.1.0

First packaged release. Ports the control loop and the monthly maintenance cycle from the reference Home Assistant implementation into an add-on.

• Grid-following control: gain/slew/clamp/deadband with anti-windup, all tuned against measured hardware behaviour (see FIELD-GUIDE.md §14).
• Saturation freeze with the duration term — three consecutive diverging cycles, not one. The instantaneous test fires on every large correction, because the plant itself needs 3-6 s to settle.
• Monthly maintenance cycle as an ownership state machine: drain / charge / hold, with exactly one writer of the setpoint at any moment.
• Capacity-tariff awareness: the maintenance charge is capped by quarter-hour peak headroom, and peak shaving outranks the maintenance schedule.
• Failsafe behaviour: commands 0 W on missing inputs, on stop, and on shutdown. Never replays a stale setpoint - the reference implementation did, and the hardware watchdog cannot catch that.
• Ingress UI with a commissioning checklist that names problems in words.
• Optional MQTT discovery for status entities.

Known limits:

• Home Assistant OS / Supervised only (add-ons cannot run on Container/Core).
• The inverter protocol is reverse-engineered; no vendor contract.
• Without the optional RS485 e-stop, nothing covers the host machine dying.