Take the heat exchanger title in both spellings

.github/mutations/plan.json

@@ -3649,14 +3649,14 @@
   {
     "label": "webif english: the running entry polls without the English titles",
     "path": "custom_components/weishaupt_modbus/__init__.py",
-    "old": "        ENGLISH_TITLES[model],\n",
+    "old": "        TITLES_SHOWN_OTHERWISE[model],\n",
     "new": "        {key: {} for key in REQUIRED_TITLES[model]},\n",
     "tests": "become_sensors_on_a_device or power_limit_is_set_from_home_assistant"
   },
   {
     "label": "webif english: the dialog reads the pages without the English titles",
     "path": "custom_components/weishaupt_modbus/webif_visit.py",
-    "old": "                ENGLISH_TITLES[model],\n",
+    "old": "                TITLES_SHOWN_OTHERWISE[model],\n",
     "new": "                {key: {} for key in REQUIRED_TITLES[model]},\n",
     "tests": "reads_each_page_it_found_once"
   },
@@ -5199,5 +5199,26 @@
     "old": "        state_class=SensorStateClass.MEASUREMENT,\n        suggested_display_precision=2,\n",
     "new": "        suggested_display_precision=2,\n",
     "tests": "running_total_is_kept"
+  },
+  {
+    "label": "webif spelling: a WBB knows the heat exchanger cut only",
+    "path": "custom_components/weishaupt_modbus/webif_sensor.py",
+    "old": "        other_titles=(HEAT_EXCHANGER_IN_FULL,),\n",
+    "new": "",
+    "tests": "spelling_the_heat_exchanger_out"
+  },
+  {
+    "label": "webif spelling: an Evoblock knows the heat exchanger in full only",
+    "path": "custom_components/weishaupt_modbus/webif_sensor.py",
+    "old": "        other_titles=(HEAT_EXCHANGER_CUT,),\n",
+    "new": "",
+    "tests": "cutting_the_heat_exchanger_title"
+  },
+  {
+    "label": "webif spelling: no page takes another spelling",
+    "path": "custom_components/weishaupt_modbus/webif_sensor.py",
+    "old": "                for value in VALUES[model]\n                if value.page == page\n                for other in value.other_titles\n",
+    "new": "                for value in ()\n                for other in value.other_titles\n",
+    "tests": "spelling_the_heat_exchanger_out or cutting_the_heat_exchanger_title"
   }
 ]

custom_components/weishaupt_modbus/__init__.py

@@ -50,10 +50,10 @@
 from .webif.client import Client
 from .webif_coordinator import WebifCoordinator, polled_pages
 from .webif_sensor import (
-    ENGLISH_TITLES,
     OPTIONAL_TITLES,
     POWER_LIMIT,
     REQUIRED_TITLES,
+    TITLES_SHOWN_OTHERWISE,
     entry_model,
 )
 from .weishaupt_modbus_api.const import DEFAULT_PORT, MODBUS_UNIT_ID
@@ -275,7 +275,7 @@ def follow_pump(change: ConfigEntryChange, changed: ConfigEntry) -> None:
         entry.data[CONF.PAGES],
         entry.options,
         REQUIRED_TITLES[model],
-        ENGLISH_TITLES[model],
+        TITLES_SHOWN_OTHERWISE[model],
         OPTIONAL_TITLES[model],
     )
     # No warning: the daily limit is the guard for settings written here.

custom_components/weishaupt_modbus/webif_coordinator.py

@@ -104,8 +104,8 @@ class Page:
     """A page to keep fresh: where it is, what it must show, how often.
 
     A menu page is read for the values its entries show one level down.
-    `english` maps the titles a controller set to English shows to the
-    German ones everything else goes by. `optional` are titles read when the
+    `english` maps the titles a controller shows otherwise, set to English or
+    spelt another way, to the German ones everything else goes by. `optional` are titles read when the
     page shows them, which it need not.
     """
 

custom_components/weishaupt_modbus/webif_sensor.py

@@ -60,6 +60,10 @@
 ONLY_WBB = frozenset({WBB})
 ONLY_EVOBLOCK = frozenset({EVOBLOCK})
 EVOBLOCK_VERSION_TITLE = "Version WEB CPU"
+# One WBB with one firmware cut this title on 2026-10-04 and spelt it out on
+# 2026-11-08, both in German; an Evoblock spelt it out.
+HEAT_EXCHANGER_CUT = "Wärmetauscher AG Austrit"
+HEAT_EXCHANGER_IN_FULL = "Wärmetauscher AG Austritt"
 # Only a WEB 13/20 set to German was seen, 2026-11-05 and 06: what its own
 # values are called in English is not known.
 NOT_SEEN = ""
@@ -72,6 +76,8 @@ class WebifSensorDescription(SensorEntityDescription):
     `english_title` is the title a controller set to English shows instead,
     as it showed it on 2026-10-10: cut at 25 characters, typing errors kept;
     NOT_SEEN for a value no controller set to English has shown.
+    `other_titles` are titles a controller showed for the same row in its
+    own language, spelt otherwise.
     `shown_unit` is the text after the number; None for a value that is text.
     `topic` is the pump device whose short name the name prefix option puts
     in front, as for the Modbus sensors of the same subject.
@@ -94,6 +100,7 @@ class WebifSensorDescription(SensorEntityDescription):
     topic: str = DEVICES.WP
     models: frozenset[str] = frozenset(MODELS)
     conditional_on: frozenset[str] = frozenset()
+    other_titles: tuple[str, ...] = ()
     off_is_zero: bool = False
     no_value_is_zero: bool = False
 
@@ -289,15 +296,17 @@ def _performance(key: str, title: str, english_title: str) -> WebifSensorDescrip
     ),
     _temperature(
         "waermetauscher_ag_austritt",
-        "Wärmetauscher AG Austrit",
+        HEAT_EXCHANGER_CUT,
         "OUTLET TEMP",
         models=ONLY_WBB,
+        other_titles=(HEAT_EXCHANGER_IN_FULL,),
     ),
     _temperature(
         "waermetauscher_ag_austritt",
-        "Wärmetauscher AG Austritt",
+        HEAT_EXCHANGER_IN_FULL,
         NOT_SEEN,
         models=ONLY_EVOBLOCK,
+        other_titles=(HEAT_EXCHANGER_CUT,),
     ),
     _temperature(
         "evi_sauggastemperatur",
@@ -493,6 +502,25 @@ def _performance(key: str, title: str, english_title: str) -> WebifSensorDescrip
     for model, values in VALUES.items()
 }
 
+# Every title a page may show for a value but the one it is kept under:
+# its English title, and its other spellings.
+TITLES_SHOWN_OTHERWISE = {
+    model: {
+        page: {
+            **english,
+            **{
+                other: value.title
+                for value in VALUES[model]
+                if value.page == page
+                for other in value.other_titles
+            },
+        }
+        for page, english in pages_of_model.items()
+    }
+    for model, pages_of_model in ENGLISH_TITLES.items()
+}
+
+
 # User wish, 2026-10-03: whether the access gets worse over time shows in
 # Home Assistant's statistics of these.
 TRAFFIC_SENSORS = tuple(

custom_components/weishaupt_modbus/webif_visit.py

@@ -25,10 +25,10 @@
 )
 from .webif_coordinator import Page, polled_pages
 from .webif_sensor import (
-    ENGLISH_TITLES,
     MODELS,
     OPTIONAL_TITLES,
     REQUIRED_TITLES,
+    TITLES_SHOWN_OTHERWISE,
     model_shown,
     shown_in_unknown_units,
 )
@@ -148,7 +148,7 @@ async def _visit(client: Client) -> Visited:
                 found,
                 {},
                 REQUIRED_TITLES[model],
-                ENGLISH_TITLES[model],
+                TITLES_SHOWN_OTHERWISE[model],
                 OPTIONAL_TITLES[model],
             )
         }

tests/test_webif_captures.py

@@ -22,9 +22,10 @@
 )
 from custom_components.weishaupt_modbus.webif_coordinator import polled_pages
 from custom_components.weishaupt_modbus.webif_sensor import (
-    ENGLISH_TITLES,
     OPTIONAL_TITLES,
     REQUIRED_TITLES,
+    TITLES_SHOWN_OTHERWISE,
+    VALUES,
     WBB,
     shown_in_unknown_units,
 )
@@ -76,7 +77,13 @@ def _titles(capture: pathlib.Path, key: str) -> list[str]:
     page = _page(capture, key)
     if "titles" in page:
         return page["titles"]
-    return [title for title, _ in page["entries"]]
+    spelt_otherwise = {
+        other: value.title
+        for value in VALUES[WBB]
+        if value.page == key
+        for other in value.other_titles
+    }
+    return [spelt_otherwise.get(title, title) for title, _ in page["entries"]]
 
 
 def _as_served(key: str, entries: list[list[str]]) -> str:
@@ -105,7 +112,11 @@ def test_the_catalogue_reads_the_captured_page(capture, key):
     page = next(
         page
         for page in polled_pages(
-            PATHS, {}, REQUIRED_TITLES[WBB], ENGLISH_TITLES[WBB], OPTIONAL_TITLES[WBB]
+            PATHS,
+            {},
+            REQUIRED_TITLES[WBB],
+            TITLES_SHOWN_OTHERWISE[WBB],
+            OPTIONAL_TITLES[WBB],
         )
         if page.key == key
     )

tests/test_webif_evoblock.py

@@ -55,6 +55,8 @@
     (Path(__file__).parent / "evoblock_titles.json").read_text(encoding="utf-8")
 )
 CONDITIONAL_ROW = "Schaltdifferenz dynamisch"
+SHORT_TITLE = "Wärmetauscher AG Austrit"
+FULL_TITLE = "Wärmetauscher AG Austritt"
 # Past every page's interval.
 ROUND_LATER = 3 * 3600
 # A row that shows a word, not a number.
@@ -240,6 +242,42 @@ async def test_a_doubled_conditional_row_stops_polling_and_says_which(hass, pump
     assert stopped[1] == f"Broken (blank or doubled: {CONDITIONAL_ROW})"
 
 
+def with_title(rows, shown, instead):
+    return [(instead if title == shown else title, text) for title, text in rows]
+
+
+async def test_a_wbb_spelling_the_heat_exchanger_out_is_whole(hass, pump):
+    """Its language reset to German after an outage, 2026-11-08, a WBB wrote
+    "Austritt" in full where on 2026-10-04 it cut it, and all 31 values went."""
+    pump.site.update(SITE)
+    pump.site[PAGES[HEAT_PUMP_PAGE]] = column(
+        "".join(
+            value(title, text)
+            for title, text in with_title(
+                SHOWN[HEAT_PUMP_PAGE].items(), SHORT_TITLE, FULL_TITLE
+            )
+        )
+    )
+
+    visited = await read_web_interface(hass, pump.host, USER, PASSWORD)
+    await _start(hass, _entries(hass, pump))
+
+    assert visited.model == WBB
+    assert _state(hass, "waermetauscher_ag_austritt") == "21.5"
+    assert _state(hass, "verdichter_drehzahl") == "2568.0"
+
+
+async def test_an_evoblock_cutting_the_heat_exchanger_title_is_whole(hass, pump):
+    """The same controller wrote both; an Evoblock may as well."""
+    pump.site[PAGES[HEAT_PUMP_PAGE]] = heat_pump_page(
+        with_title(ROWS[HEAT_PUMP_PAGE], FULL_TITLE, SHORT_TITLE)
+    )
+
+    await _evoblock(hass, pump)
+
+    assert _state(hass, "waermetauscher_ag_austritt") == "12.0"
+
+
 async def test_dynamic_switching_is_read_while_the_page_shows_it(hass, pump):
     await _evoblock(hass, pump)