glenn schrooyenandClaude Opus 5
bcee2356e0
Review of the fix commit found that BOTH halves reverted with the whole 24-file suite still green - including the half that turns a crash into a SILENT ACCEPTANCE, which was my own wrong first attempt at this fix. A fix nothing grades is a fix that comes back. MUTATION.md habit 4. ⚠️ AND THE OBVIOUS PIN HAD THE SAME DEFECT IT WAS WRITTEN TO CATCH. "problems_ and_ranges does not raise" is ALSO satisfied by the backstop swallowing the exception and returning [] - the silent acceptance half two exists to prevent. MEASURED: with both halves reverted, every max_w check reported `ok` and only the forced-boom pins went red. So half one is now pinned on `build_roster` ITSELF, where the backstop cannot answer for it. That is the same defect as the one being fixed - a check whose data cannot reach the failure it names - written into the check for it, and it is the twelfth recorded instance. New section 2b of test_selfconfig.py: - `_flat_max_w` agrees with `_number()` across ten shapes, so composition tolerates exactly what rule 9 tolerates. - ⭐ `build_roster(max_w="")` does not raise - half one, standing alone. - a cleared box answers with the validator's own verdict; an unparseable one answers "max_w 'abc' is not a number". - ⭐ clearing max_w on the LIVE shape (5000 W rail, explicit slew_w 400) is REFUSED by rule 10 "against a site rail of 2000 W". `unit_caps_indexed` reads the flat rail through the same `_number`, so the rail collapses in lockstep and rule 10 catches the collapse. This is what makes the fix safe rather than merely non-crashing: the box cannot be emptied into a quietly halved rail. - ⭐ the backstop never returns an empty list, forced by monkeypatching build_roster to raise; and the patch is shown undone. DRIVEN, all four arms through the real harness: clean rc=0 fails=0 revert half one rc=1 fails=2 (_flat_max_w -> bare float()) revert half two rc=1 fails=2 (backstop returns [] again) revert BOTH rc=1 fails=3 Each half is caught on its own, which is the property the earlier draft lacked. Suite: 24 files, all pass. Not addressed here, filed instead: N3 (`/config/` 404s), N4 (undeclared keys on a hand-crafted POST, which the page cannot produce and Supervisor drops), N5 (saving pins every default as an explicit option), the page reporting "would start" for a blob Supervisor's own schema refuses, and 2000.0 hardcoded in three places that agree today with nothing pinning them together. 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
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.