admin
559f0eb022
run_tariff_refresh() was created only under `if arbitrage.enabled(opts)`, and it is the sole caller of resolve_tariff(), which is the sole caller of price_history.carry(). arbitrage_enabled defaults to false, so on a shipped install with a provider configured nothing was ever fetched, no plan resolved, /data/price_history.json never written, FCST-04's Price history row read `empty` forever, and TARIFF-09's warning never fired. Every price check constructs its own resolve_tariff() call, so the suites exercised a path production never reached. Measured, not inferred: a 40-hour soak ran two instances side by side - the shipped default made zero feed requests and never created its store across all 802 samples, while an identical instance with arbitrage armed resolved a 132-point plan from the same feed. DOCS.md:1348 has claimed the fixed behaviour all along. The product owner's decision is Option A: a configured provider fetches. Trading stays separately gated, and that is graded directly rather than inferred - the real control loop is driven on a resolved provider plan with arbitrage_enabled the only option moving: off gives +180 W self-consumption, on gives -5000 W at the cheapest hour and +5000 W elsewhere. The armed rows are what make the unarmed row evidence. ONE ACCEPTANCE CRITERION WAS DELIBERATELY NOT IMPLEMENTED LITERALLY, and the deviation is right. The criterion said no fetch task at all when price_provider is off, whatever arbitrage_enabled says. That breaks a configuration validate.py explicitly accepts - provider off, static_profile set, arbitrage armed - by leaving tariff_plan at None forever, silently disarming a strategy the UI reports as running. Driven both ways. The guard is therefore `provider_configured(opts) or arbitrage.enabled(opts)`; the criterion's stated harm is still fully met, because with the provider off resolve_tariff() answers out of the static profile and opens no socket, and the true shipped default starts no task at all. DECISIONS section 3 records the trade. cheap_now() is NOT wired, deliberately. On a provider-only site static_status() returns False on every cycle, so adopting it would take the maintenance cycle's paid grid top-up from never to sometimes - a change to what spends money, and it needs its own decision rather than riding along on this one. Evidence: 29/29 green. 13 mutations over 14 runs, each on a fresh tree copy, purged, :ro, -B. The shipped defect at -4 B is red on 7 named checks. The reachability check grades reachability from a CONFIGURATION rather than from the `if` statement - the `if` is exactly what someone meant to write. The instrument itself was mutated too, both +0 B, both red. One real survivor was found and closed in the same commit: provider_id() dropping .strip() left four price suites green. And one fixture defect was found and fixed - five minutes of P1 telegrams made the peak guard blind depending on where the wall clock sat in the billing quarter, so the armed baseline failed to trade on some runs.
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
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.