glenn schrooyenandClaude Opus 5
eb88646899
The Supervisor decides an update exists by comparing config.yaml's version string with the one the box reports. master and release/1.0 both said 0.10.0, so SAFETY-57 - a deadlock that parked the reference battery for ~13 min on 2026-09-21 while the house exported 2.4 kW - had no way of reaching the box that has it. A patch bump is the delivery mechanism, not bookkeeping. - config.yaml: 0.10.0 -> 0.10.1. Nothing else in the option surface moves: no key added or removed, no default changed, no enum widened, no rule added to validate.py, so a blob that starts on 0.10.0 starts on 0.10.1. - CHANGELOG.md: a new `## 0.10.1` section, holding SAFETY-57's entry moved out of `## 0.10.0`. The entry opened by saying it was misfiled and that whoever cut the next version owned moving it; this is that cut, so that paragraph is replaced by what an operator actually needs in order to decide - what the deadlock does (command parked at 0 W, batt reading gated to MISSING, escape condition unreachable from inside the state), how to recognise it (setpoint stuck at exactly 0 W with the battery register flat, a STALE line and no clearing line) and that a restart of the add-on clears it. - PKG-16 proper: `## 0.10.0`'s preamble still claimed 0.10.0 "has never been built or pulled anywhere" and that the reference install was on 0.7.0. Both stopped being true on 2026-09-20 ~22:18 CEST, when 0.10.0 was installed as a repository add-on (slug 68285ac7_goodwe_controller) and began regulating a real battery. The section's own bump argument was explicitly conditional on that; the condition has fired, so the argument is retold as history and the section is closed. This text is what the Supervisor shows beside Update. Also fixes, in this file only, the three non-blocking documentation defects raised on PR #104 - issuecomments 1445, 1446 and 1447: - 1446: the live episode is 790 s, not 710 s. Re-derived rather than rescaled: at >= 790 s the committed 16-day replay gives 16 of 93, not 17. - 1447: the BMS keep-alive pulse was an inference stated as a measurement. No committed capture identifies one, and on this episode 0x0518 never moved at all. The measured claim replaces the firmware story. - 1445: "neither consumer can reach a verdict inside one window" is universal as written and graded on a fixture that puts the obligation back on every release. It now carries the qualifier the reviewer asked for, and names the unbounded case and why the shipped one-inverter roster cannot reach it. The same three defects also sit in app/freshness.py, test_freshness.py, DOCS.md and the DECISIONS note. They are deliberately NOT touched here: this PR is config.yaml and CHANGELOG.md only, and none of them is worth delaying a live safety fix. SAFETY-56 and SAFETY-58 are likewise untouched. 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.