adminandClaude Opus 5
0ef9565071
0.11.0 shipped `pv_entity` as a single string. The reference site's owner reported within minutes of it going live that they have several PV inverters and could configure one - which is ordinary for a multi-string roof, not a property of one house. `pv_entities` is the roster and the row carries the SITE total. ⚠️ THE HARD PART IS ABSENCE, NOT THE LIST. Three configured, one `unavailable`, and the sum of the other two is a SMALLER NUMBER INDISTINGUISHABLE FROM A REAL ONE. Read back by OPT-10 that says "there was less PV than there was" - the "no irradiance" conclusion the channel exists to TEST. So `pv.total()` answers `None` the moment any configured entity is absent: the topic carries HA's own `None`, the entity goes to `unknown`, the recorder records a GAP. The alternative (the partial sum beside a contributor count) was implemented and run as mutation N1b; it loses because the MQTT row is read COLD a week later by an attribution that would believe it, while the qualifying count would live in a second entity with its own history. The partial information is not thrown away - the STATUS PAGE names every entity that reported, with its watts, and every one that did not, with its reason, because that surface is read LIVE by a human who wants the diagnostic. ⚠️ AND THE MIRROR: a member honestly reporting 0 W is SUMMED. The test is `is None`, never falsiness - a roster that blanked the site on a zero would report an absence on every clear evening. THE SURFACE IS MEASURED, NOT PREFERRED. `pv_entity` could not become a list: tools/supervisor_shape_probe.py §G shows Supervisor 2026.08.0 answering an 0.11.0 install's stored string with `Invalid list for option 'pv_entity'`, and deepmerge's list strategy is `override` so a `[]` default does not rescue it - the live add-on would not start. `match(.*)?` does accept both shapes and is rejected for a different, measured reason: it validates nothing (a string, a list and the integer 417 all pass) and renders as a plain text box. So `pv_entities` joins `pv_entity` and REPLACES it when set, CFG-04's rule for `inverters:`, with a status caution saying which key won - a union would double-count the inverter the old key still names. STILL NOT A CONTROL INPUT. tools/tel11_pv_trace.py was extended rather than replaced and now grades five claims over three document sets. The control hash is UNMOVED - 846a10a5b89e… on `unset` and on `one`, on both trees - and the roster control document is byte-identical between the two trees. 2/5 is a claim TEL-11 could not make: with 0.11.0 as the baseline, "one entity behaves exactly as 0.11.0 does" is a real cross-tree identity over control AND telemetry. ⚠️ TEL-11's OWN `--compare` REFUSAL HAD TO CHANGE, and that is MUTATION.md habit 24: a discriminator defined as "the baseline lacks this feature" dies on the release that ships the feature, and dies as a false refusal. Twelve mutations, each on a fresh purged `cp -a`, no survivors. N5 is +0 B (`sum` -> `max`, the same three characters) and was run on a fresh copy with `cmp` confirming the edit on disk. The fixture is three distinct NON-ZERO contributions in two units with absence driven at EVERY position - a member contributing 0 W could go absent without moving the sum of the rest, which is habit 23 with a coinciding value in the arithmetic rather than in the plant. 31/31 in the CI image. Not deployable as merged: config.yaml stays at 0.11.0, so predeploy_check.py reports a NO-OP until PKG cuts a version. A CHANGELOG entry is wanted and deliberately not written - 11b forbids `## Unreleased` and the bump is PKG's call; DECISIONS/TEL-12-several-pv-inverters.md is the material it needs. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BwRLw7eKYj2byVdwB6kbjU
GoodWe RS485 Controller — Home Assistant add-on repository
Replaces a GoodWe battery inverter's vendor controller with a local one: holds net grid exchange at zero by emulating the inverter's smart meter over RS485, and runs the monthly battery maintenance cycle the vendor box was doing.
repository.yaml add-on repository metadata
goodwe_controller/ the add-on
config.yaml manifest + options schema (the per-site config form)
app/ the controller
control.py the control law — pure functions, no I/O
maintenance.py the monthly cycle state machine
hass.py Supervisor/Core API access
store.py persistent state in /data
mqtt.py optional status entities
web.py ingress UI — routes only, status and configuration
config_page.py the configuration page's markup, style and script
configui.py its field model, built from the Supervisor's own
schema + translations — owns no key, label or rule
selfconfig.py reading and writing this add-on's own options,
with the validate-first / compare-and-swap gate
main.py orchestration, heartbeat, failsafe behaviour
test_control.py runnable checks — no framework needed
test_maintenance.py runnable checks — walks a full cycle in fake time
DOCS.md the add-on's documentation tab
MUTATION.md how to run a mutation so the result means something
tools/mutation_run.sh the mutation harness - purges bytecode, then grades
tools/supervisor_selfapi_probe.py what the Supervisor really permits and
returns, run against its own release image
firmware/goodwe-master.yaml ESPHome config for the T-CAN485
estop/rs485_log.py optional RS485 e-stop / bus witness
docs/GoodWe-RS485-Field-Guide.pdf the guide techs carry (10pp, A4)
docs/build_guide.py its single source - rebuilds the HTML and PDF
FIELD-GUIDE.md how to edit and rebuild the guide
docs/RELEASE.md how a change reaches the battery - `master` is
protected, releases go via PR from `release/1.0`
Picking this up after a break? Read HANDOVER.md first — current state,
what is known broken, and what to do next.
Install
Settings → Add-ons → Add-on store → ⋮ → Repositories → add
https://gittea.kammenstraatha.duckdns.org/admin/goodwe-addon
then install GoodWe RS485 Controller.
⚠️ The repository must be PUBLIC for this to work. Home Assistant clones it
anonymously; against a private repo the store shows nothing and gives no useful
error. If it must stay private, install locally instead: copy
goodwe_controller/ into the machine's /addons/ folder, then
ha store reload — it appears as a Local add-on.
⚠️ Bump version: in goodwe_controller/config.yaml for every change.
Supervisor keys the built image by that version, so without a bump it silently
reuses the old image and your fix appears not to work — on your bench and on
every client's machine.
Requires Home Assistant OS or Supervised. Add-ons cannot be installed on HA Container or Core.
Read this first
The inverter holds its last command forever. It has no meter-timeout of its own — a controller that dies mid-command leaves the battery running until a human intervenes. Measured on real hardware: 5 kW of discharge held for 113 seconds after a controller went silent.
Three layers exist because of that, and only the third covers the Home Assistant machine itself dying:
- ESP32 watchdog — no fresh setpoint for ~30 s → command 0 W, and keep commanding it.
- Wind-down before firmware updates — 0 W written before the update starts.
- RS485 e-stop (optional) — writes 0 W after 30 s of total bus silence.
Sites sold without the e-stop must have the acknowledgement in FIELD-GUIDE.md
§10 signed.
Development
The control law and the maintenance machine are pure Python with no Home Assistant imports, so they run anywhere:
cd goodwe_controller
python3 test_control.py
python3 test_maintenance.py
Both must pass before shipping any change. To prove a check bites - the way
almost every claim in this repository was established - mutate the module and
run tools/mutation_run.sh, which clears __pycache__ first. It is not
optional: a same-size edit reverted inside one second leaves CPython reusing the
old bytecode, and the run grades code that is not there. goodwe_controller/MUTATION.md
has the mechanism, the measurement, and what the flags do not do. They are not unit-test theatre —
each assertion corresponds to a rule whose absence produced an observed failure
on real hardware, and the comments in control.py say which.
Compatibility
Check the serial number, not the model name. Characters 6-8 of the serial are the platform tag:
| tag | platform | verdict |
|---|---|---|
ESU EMU ESA BPS BPU EMJ IJL |
105 — ES/EM/BP, AA55-era meter bus | supported |
SPB SPN |
745 — SBP G2 (GW…-SBP-20) |
no |
ESN ESC |
745 — ES G2 (GW…-ES-20) |
no |
ETU EHU BTU … |
205/745/753 — ET/EH/BT hybrids | no |
SDT DST MSU NSU … |
PV-only inverters — no battery to control | no |
A "-20" or "G2" suffix means a different platform with a different meter
protocol. The tags come from the goodwe library's PLATFORM_105_MODELS, which
is also what Home Assistant's own integration uses to pick a protocol.
- GoodWe ES / BP family inverters (AA55 / RS485 meter-bus generation)
- The protocol is reverse-engineered. There is no vendor contract, and a firmware change on GoodWe's side could break every installation at once. Say so when you sell it.