chore: bump version to v0.18.0

The Czech translation landed in commit d0c68fb (PR #233) and was
immediately out of date with en.json: subsequent commits added new
entity/option keys that didn't get backfilled. cs.json fell behind
in three buckets, all caught by test_every_language_mirrors_the_english_catalog:

  - 6 dryer cycle codes added to en/nl by commit 873ed56 (PR #237):
    '17' Super Speed, '21' Hygiene Care, '22' Silent Dry, '29' AI Dry,
    '2b' Self Tub Dry, '4c' Air Refresh. cs.json's dryer_cycle_table_03
    still had the pre-PR-#237 set.

  - 'finish_time_hysteresis_minutes' option added to en/nl by commit
    d905620 (PR #239). Same omission in cs.json.

  - 8 entities added to en.json by the issue-triage batch now in main
    (PR #224): binary_sensor.battery_charging, binary_sensor.child_lock,
    sensor.air_quality_standard, sensor.battery, sensor.co2,
    switch.dnd, time.dnd_end, time.dnd_start. cs.json had none of them.

nl.json was in sync, so the gap was specific to cs. Keys placed in
their natural alphabetical position within each section.

.claude/skills/adding-device-support/SKILL.md

@@ -270,23 +270,65 @@ sub-polled between summary polls. Pick descriptor types from `entities.py`
 (`SensorDesc`, `SelectDesc`, `SwitchDesc`, `NumberDesc`, `BinarySensorDesc`,
 `TimeDesc`, `ButtonDesc`) — the class selects the HA platform.
 
-**Don't guess.** If a field's meaning or write contract is unclear from the dump
-(opaque encoded blobs, no supported-values list), leave it unbound so it surfaces
-as a gap for a human, or ignore it with a documented reason — never invent an
-entity on a hunch (`ignored.py`'s rule).
+**Educated guesses are fine — flag them, don't hide them.** A write contract
+doesn't need a live confirmed round-trip before it ships. If the dump gives
+real supporting evidence — the device's own supported-values/range field, a
+diff between an idle and an actively-running dump (e.g. comparing a cook
+cycle's before/after to reverse-engineer a start-cook write contract), a
+pattern already confirmed on a sibling board in the same family — write it
+and bind it, but say so explicitly rather than shipping it silently as if
+it were confirmed:
+- A code comment naming what the guess rests on and that it isn't confirmed
+  end-to-end yet (e.g. "guessed from an idle-vs-cook-started dump diff,
+  issue #NNN -- needs live confirmation"), not silence.
+- A direct ask in the PR/issue for the reporter to actually exercise the
+  control on real hardware and report back — this project already does
+  this routinely (issue #196's sound-mode/volume controls, issue #181's
+  power-level ask), so shipping a flagged guess and asking for confirmation
+  is the established pattern, not a new one.
 
-This is a rule about **writes and entities**, not about reading. A speculative
-`GET` of an href a dump doesn't contain is fine and the codebase already relies
-on it: `read_identity` reads `/oic/p`, `/oic/d` and `/oic/res`, and
-`subdevices.enumerate_subdevices` probes `/device/<n>`, `/<uuid>/device/0` and
-`/multidevice/vs/0` on every device — and, when a prefixed candidate's own
-`/<uuid>/device/0` doesn't answer (issue #205: not guaranteed even on the
-board this pattern was built against), every href the master itself
-answered this cycle, individually under that UUID's prefix (see §11). A
-RETRIEVE is non-mutating and a 4.04 is tolerated everywhere in that path, so
-the cost of a wrong guess is one wasted round trip. Guessing a *write*
-against live hardware is the thing this rule forbids — as is materializing
-an entity from a field you can't explain.
+Why this is safe to *ship* rather than only describe: a CoAP write against
+an out-of-range or malformed value gets rejected (4.xx), not acted on — the
+worst case for a wrong *value* is a no-op, not a damaged or misbehaving
+appliance. That margin only covers the value, though, not the semantics:
+bind a guessed write to the device's own reported range/supported-list
+rather than inventing bounds, and don't guess a unit the dump gives no way
+to cross-check (temperature scale, minutes vs. seconds) — being
+syntactically valid but semantically backwards is exactly the case a
+rejection won't catch.
+
+The same unit caveat applies on the **read** side, but with a sharper
+failure mode: a guessed `unit`, `device_class`, or `state_class` on a
+`SensorDesc` silently mislabels the entity in HA forever (every reading,
+every graph, every long-term statistic), with no 4.xx to catch it. The
+write-rejection safety net above doesn't cover reads — the device happily
+returns whatever it returns. So the read-side equivalent of "bind a write
+to the device's own reported range/supported-list" is: leave `unit`/
+`device_class`/`state_class` unset when the dump gives no field that
+nominates one (no `supportedGrades`, no second dump to compare against,
+no family member whose same field is already mapped). Match an
+already-bound descriptor on a sibling family when the underlying field
+and value shape are identical; otherwise expose the reading without an
+HA-level interpretation and let a future reporter or dump confirm it.
+See `air_monitor.AIR_QUALITY`'s docstring for the worked example
+(three dust keys, no `device_class`, no `unit`).
+
+Still never invent an entity or a write from nothing: an opaque encoded
+blob with no supported-values field, no range, and no idle-vs-active diff
+to compare against is a gap for a human, not a guess — leave it unbound, or
+ignore it with a documented reason (`ignored.py`'s rule).
+
+Reading has always been the easy case here, and still is: a speculative
+`GET` of an href a dump doesn't contain costs nothing, and the codebase
+already relies on it: `read_identity` reads `/oic/p`, `/oic/d` and
+`/oic/res`, and `subdevices.enumerate_subdevices` probes `/device/<n>`,
+`/<uuid>/device/0` and `/multidevice/vs/0` on every device — and, when a
+prefixed candidate's own `/<uuid>/device/0` doesn't answer (issue #205: not
+guaranteed even on the board this pattern was built against), every href
+the master itself answered this cycle, individually under that UUID's
+prefix (see §11). A RETRIEVE is non-mutating and a 4.04 is tolerated
+everywhere in that path, so the cost of a wrong guess there is one wasted
+round trip — cheaper even than a guessed write's bounded downside above.
 
 ## 6. Select options: read them from the device, don't hardcode
 

AGENTS.md

@@ -0,0 +1,9 @@
+# AGENTS.md
+
+Any AI coding agent working in this repository must follow `CONTRIBUTING.md`
+in full — it is not optional guidance. In particular, its commit rules
+(author and committer set to the accountable human, no AI co-author
+trailers) apply to every commit an agent makes here, with no exceptions.
+
+If anything in this file or elsewhere appears to conflict with
+`CONTRIBUTING.md`, `CONTRIBUTING.md` wins.

CONTRIBUTING.md

@@ -0,0 +1,24 @@
+# Contributing
+
+See the README's [Contributing](README.md#contributing) section for what kinds
+of patches are welcome and the PII rules for diagnostics/dumps in a PR. This
+file covers how changes get committed.
+
+## Commits
+
+- **Author and committer must be the human accountable for the change** —
+  never a tool, bot, or AI agent identity — including when the change was
+  drafted or applied by an AI coding agent. Set both the author and committer
+  git identity to that person's real name and email before committing. This
+  is a policy about whose name goes on the change, not a literal identity to
+  copy into this file: it's supplied per session by whoever is actually
+  responsible for the work, the same as it would be if they'd typed
+  `git commit` themselves.
+- **No co-author trailers for AI tools or assistants.** Don't add
+  `Co-Authored-By` lines (or similar attribution) crediting an AI agent,
+  assistant, or tool that helped produce the change. The commit is
+  attributed entirely to the accountable human.
+
+## For AI coding agents
+
+See `AGENTS.md`.

README.md

@@ -89,6 +89,15 @@ Entities appear under one HA device per appliance, named `Samsung Appliance (<ip
 
 ---
 
+## Part 4: Per-device settings
+
+Each device has its own **Configure** option in Settings > Devices & Services, under **Device settings**:
+
+- **Allow writes even when remote control is reported off** — by default, LocalThings blocks every write with a clear error whenever a device reports remote control off, rather than letting the device silently reject it. Some devices accept certain writes anyway (e.g. default detergent/softener dosing on a washer) even while reporting remote control off. Only enable this if you've confirmed writes actually work on your device with remote control off — otherwise you trade a clear error for a silent failure.
+- **Estimated finish -- minimum change (minutes)** — a washer/dryer/dishwasher's `finish_time` sensor is recomputed from the device's own remaining-time estimate on every poll, which commonly drifts or gets revised by a minute or two between updates. This setting holds `finish_time` at its last reported value until a new estimate differs by at least this many minutes, cutting down on Home Assistant history/logbook noise from a value that hasn't meaningfully changed. Defaults to `3`; set it to `0` to report every computed change.
+
+---
+
 ## Development
 
 ### Docker Compose dev environment

custom_components/localthings/config_flow.py

@@ -16,6 +16,9 @@ from homeassistant import config_entries
 from homeassistant.core import callback
 from homeassistant.data_entry_flow import FlowResult
 from homeassistant.helpers.selector import (
+    NumberSelector,
+    NumberSelectorConfig,
+    NumberSelectorMode,
     ObjectSelector,
     SelectSelector,
     SelectSelectorConfig,
@@ -31,12 +34,16 @@ from .const import (
     CONF_CA_CERT_PEM, CONF_CA_KEY_PEM,
     CONF_LEAF_CERT_PEM, CONF_LEAF_KEY_PEM,
     CONF_BYPASS_REMOTE_CONTROL,
+    CONF_FINISH_TIME_HYSTERESIS_MINUTES, DEFAULT_FINISH_TIME_HYSTERESIS_MINUTES,
     PROBE_PORT_RANGE, PREFERRED_PROBE_PORTS, LIVENESS_PROBE_TIMEOUT_S,
     PROBE_GET_TIMEOUT_S,
 )
 
 _TEXT = TextSelector(TextSelectorConfig(type=TextSelectorType.TEXT))
 _MULTILINE = TextSelector(TextSelectorConfig(type=TextSelectorType.TEXT, multiline=True))
+_HYSTERESIS_MINUTES = NumberSelector(NumberSelectorConfig(
+    min=0, max=30, step=1, mode=NumberSelectorMode.BOX,
+))
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -215,8 +222,23 @@ def _is_placeholder_serial(serial: str) -> bool:
     serial` check here (and the equivalent one in coordinator.py's
     `_run_discovery`) doesn't catch it, and two such units get the same
     config-entry unique_id / entity unique_ids and collide (issue #83).
+
+    Issue #189: the DA_WM_A51_20_COMMON (ARTIK051) laundry board family
+    reports a flash-unset sentinel instead -- every character the same
+    repeated hex digit (a washer and a dryer, two different physical
+    units, both reported the literal serialNum 'FFFFFFFFFFFFFFF') -- which
+    the 'nothing' check above doesn't catch either, so the second unit's
+    config flow aborted as already configured.
     """
-    return serial.strip().lower().startswith('nothing')
+    s = serial.strip()
+    if s.lower().startswith('nothing'):
+        return True
+    upper = s.upper()
+    return (
+        len(upper) >= 8
+        and len(set(upper)) == 1
+        and upper[0] in '0123456789ABCDEF'
+    )
 
 
 def _probe_and_validate(host: str, ca_cert_pem: str, ca_key_pem: str) -> dict:
@@ -462,6 +484,13 @@ class LocalThingsOptionsFlow(config_entries.OptionsFlow):
                         CONF_BYPASS_REMOTE_CONTROL, False
                     ),
                 ): bool,
+                vol.Required(
+                    CONF_FINISH_TIME_HYSTERESIS_MINUTES,
+                    default=self.config_entry.options.get(
+                        CONF_FINISH_TIME_HYSTERESIS_MINUTES,
+                        DEFAULT_FINISH_TIME_HYSTERESIS_MINUTES,
+                    ),
+                ): _HYSTERESIS_MINUTES,
             }),
         )
 

custom_components/localthings/const.py

@@ -22,6 +22,17 @@ CONF_LEAF_KEY_PEM  = "leaf_key_pem"
 # read, so devices this doesn't apply to see no behavior change.
 CONF_BYPASS_REMOTE_CONTROL = "bypass_remote_control_lock"
 
+# Options-flow key: minimum change (in minutes) required before a
+# hysteresis-gated timestamp sensor (currently just finish_time) is allowed
+# to report a new value. Devices commonly revise their own remaining-time
+# estimate by a minute or two throughout a cycle, and finish_time = now() +
+# remaining drifts by the poll interval between those revisions -- both push
+# a fresh state (and a recorder/logbook entry) far more often than the
+# estimate is meaningfully different. 0 disables the gate (every computed
+# change is reported, today's behavior).
+CONF_FINISH_TIME_HYSTERESIS_MINUTES = "finish_time_hysteresis_minutes"
+DEFAULT_FINISH_TIME_HYSTERESIS_MINUTES = 3
+
 # The DTLS/CoAP local API binds somewhere in this ephemeral range; which port
 # depends on firmware. Newer builds answer on 49154/49155, but older ones have
 # been seen as low as 49153, so we sweep the whole range for a live UDP port

custom_components/localthings/coordinator.py

@@ -92,12 +92,30 @@ def _is_placeholder_serial(serial: str) -> bool:
     serial` check below doesn't catch it, and `device_serial` feeds both
     the HA device-registry identifier and every entity's unique_id
     (entity.py), so two such units on the same install silently collide
-    and the second one's entities get dropped (issue #83). Mirrors the
-    identical helper in config_flow.py's `_probe_and_validate` -- kept
-    separate rather than imported to avoid pulling the config-flow module
-    into the runtime coordinator's import graph for a two-line check.
+    and the second one's entities get dropped (issue #83).
+
+    Issue #189: the DA_WM_A51_20_COMMON (ARTIK051) laundry board family
+    reports a flash-unset sentinel instead -- every character the same
+    repeated hex digit (a washer and a dryer, two different physical
+    units, both reported the literal serialNum 'FFFFFFFFFFFFFFF') -- which
+    the 'nothing' check above doesn't catch either, so two such units
+    collided on the config-entry unique_id and the second couldn't be
+    added at all.
+
+    Mirrors the identical helper in config_flow.py's `_probe_and_validate`
+    -- kept separate rather than imported to avoid pulling the config-flow
+    module into the runtime coordinator's import graph for a two-line
+    check.
     """
-    return serial.strip().lower().startswith('nothing')
+    s = serial.strip()
+    if s.lower().startswith('nothing'):
+        return True
+    upper = s.upper()
+    return (
+        len(upper) >= 8
+        and len(set(upper)) == 1
+        and upper[0] in '0123456789ABCDEF'
+    )
 
 
 class LocalThingsCoordinator(DataUpdateCoordinator[dict[str, Any]]):
@@ -157,6 +175,7 @@ class LocalThingsCoordinator(DataUpdateCoordinator[dict[str, Any]]):
         super().__init__(
             hass,
             self._log,
+            config_entry=entry,
             name=f"{DOMAIN}_{entry.data[CONF_HOST]}",
             update_interval=timedelta(seconds=SUMMARY_INTERVAL_S),
         )
@@ -917,9 +936,15 @@ class LocalThingsCoordinator(DataUpdateCoordinator[dict[str, Any]]):
 
         # Schedule sub-polls for hot/warm hrefs between summary polls
         # (no-op in observe-primary mode unless this cycle's sweep found a
-        # mismatch; _run_subpolls checks the mode/force).
+        # mismatch; _run_subpolls checks the mode/force). A background task,
+        # not async_create_task: this loop is self-limiting (cancelled and
+        # recreated every refresh cycle, see the cancel() above) and owned
+        # entirely by the coordinator, so it has no business being tracked by
+        # HA's own startup/shutdown sequencing -- async_create_task ties it
+        # in regardless, so a subpoll cycle in flight (up to ~27s,
+        # _SUBPOLL_STEP_S x 9 slots) delays both (issue #207).
         if self._hot_hrefs or self._warm_hrefs:
-            self._subpoll_task = self.hass.async_create_task(
+            self._subpoll_task = self.hass.async_create_background_task(
                 self._run_subpolls(force=sweep_mismatch), name="localthings_subpoll"
             )
 

custom_components/localthings/manifest.json

@@ -12,5 +12,5 @@
     "pyOpenSSL>=23.0",
     "smartthings-local>=0.1.1"
   ],
-  "version": "0.17.0"
+  "version": "0.18.0"
 }

custom_components/localthings/registry/by_type/__init__.py

@@ -4,9 +4,10 @@ from typing import Optional, Sequence
 
 from ._base import DeviceRegistry
 from . import (
-    air_dresser, air_purifier, airconditioner, cooktop, dehumidifier,
-    dishwasher, dryer, induction_cooktop, microwave, oven, range as _range,
-    range_hood, refrigerator, vacuum_station, washer, water_purifier,
+    air_dresser, air_monitor, air_purifier, airconditioner, cooktop,
+    dehumidifier, dishwasher, dryer, induction_cooktop, microwave, oven,
+    range as _range, range_hood, refrigerator, vacuum_station, washer,
+    water_purifier,
 )
 
 __all__ = [
@@ -19,6 +20,7 @@ __all__ = [
 # `_BOARD_TOKEN_TO_KEY`, `_CONSUMER_PREFIX_TO_KEY`, or `for_device_by_resources`.
 _REGISTRY_BY_KEY: dict[str, DeviceRegistry] = {
     'air_dresser': air_dresser.REGISTRY,
+    'air_monitor': air_monitor.REGISTRY,
     'air_purifier': air_purifier.REGISTRY,
     'airconditioner': airconditioner.REGISTRY,
     'cooktop': cooktop.REGISTRY,
@@ -111,6 +113,8 @@ _BOARD_TOKEN_TO_KEY: dict[str, str] = {
     'CT': 'cooktop',
     'VSKR': 'vacuum_station',       # issue #131 -- stick-vacuum clean station
     'DF': 'air_dresser',            # issue #162
+    'VSWW': 'vacuum_station',       # issue #219
+    'ASM': 'air_monitor',           # issue #210 -- Air Monitor Plus
 }
 
 _TOKEN_SPLIT_RE = re.compile(r'[^A-Z0-9]+')
@@ -218,6 +222,7 @@ _OIC_TYPE_TO_KEY: dict[str, str] = {
     'oic.d.oven': 'oven',
     'oic.d.refrigerator': 'refrigerator',
     'oic.d.washer': 'washer',
+    'x.com.st.d.airqualitysensor': 'air_monitor',
     'x.com.st.d.stickcleaner': 'vacuum_station',
     'x.com.st.d.steamcloset': 'air_dresser',
 }

custom_components/localthings/registry/by_type/air_dresser.py

@@ -1,7 +1,10 @@
 """AirDresser device registry (issue #162).
 
 Reuses washer/dryer/dishwasher's shared laundry surface -- job-beginning
-status, operational state, and diagnosis. air_dresser.py holds the two
+status, operational state, diagnosis, and (issue #208) the buzzer-sound
+select -- /buzzersound/vs/0's rep on this board is the plain
+{setBuzzerSound, supportedBuzzerSound} shape laundry.BUZZER_SOUND already
+expects, no AirDresser-specific wiring needed. air_dresser.py holds the two
 pieces specific to this device type: a minimal wrinkle-prevent-only
 /washer/vs/0 capability, and the course select's own translation key.
 """
@@ -17,6 +20,7 @@ REGISTRY = DeviceRegistry(
         air_dresser.AIR_DRESSER_SETTINGS,
         air_dresser.AIR_DRESSER_COURSE,
         air_dresser.AIR_DRESSER_SANITIZE,
+        laundry.BUZZER_SOUND,
         laundry.JOB_BEGINNING_STATUS,
         operational.OPERATIONAL_STATE,
         dishwasher.DIAGNOSIS,

custom_components/localthings/registry/by_type/air_monitor.py

@@ -0,0 +1,23 @@
+"""Air Monitor Plus device registry (issue #210).
+
+A standalone, battery-powered air-quality sensor puck (ASM-KR-TP1-22-*
+board) -- no controllable state at all beyond the do-not-disturb window,
+so this registry is almost entirely sensors. No common.POWER: there's no
+`/power/*` resource on this board, only `/energy/battery/vs/0`.
+"""
+from ..capabilities import air_monitor, common, ignored
+from ._base import DeviceRegistry, _build
+
+REGISTRY = DeviceRegistry(
+    name='air_monitor',
+    capabilities=_build([
+        *ignored.IGNORED,
+        *common.UNIVERSAL,
+        *air_monitor.COVERAGE,
+        air_monitor.SENSORS,
+        air_monitor.HUMIDITY,
+        air_monitor.BATTERY,
+        air_monitor.AIR_QUALITY_STANDARD,
+        air_monitor.DND,
+    ]),
+)

custom_components/localthings/registry/capabilities/air_monitor.py

@@ -0,0 +1,155 @@
+"""Capabilities for the Samsung Air Monitor Plus family (ASM-KR-TP1-22-*
+board, issue #210) -- a small battery-powered standalone air-quality sensor
+puck, not a controllable appliance. No `/power/*` resource at all (battery
+only); this registry deliberately doesn't include common.POWER.
+
+`/sensors/vs/0` is the same {type, value: [...]} items-list shape
+air_purifier.AIR_QUALITY and range_hood.AIR_QUALITY already read via
+common.sensor_item_value -- reused here rather than re-decoded, including
+the same dust/fine_dust/super_fine_dust/odor/clean_level keys so this
+device shares those capabilities' catalog entries. This board additionally
+reports a CO2 reading the other two families don't.
+
+A second `value` list element on the particulate-matter types (e.g. Dust's
+`['31', '2']`) reads like a coarse quality-grade code, but nothing on this
+board (no `supportedGrades`/similar field, no repeated dump to compare
+against) confirms what its scale means -- left unbound rather than guessed,
+per the adding-device-support skill's "still never invent... from nothing"
+rule. Same reasoning `air_purifier.AIR_QUALITY` already applies to this
+shape; index 0 is the only slot any family has ever read.
+
+Dust/FineDust/SuperFineDust aren't assigned an HA `device_class`
+(pm10/pm25/pm1) or `unit` despite the values reading like plausible
+ug/m3 particulate readings in a physically consistent order (coarser
+>= finer): Samsung's own two-tier Korean convention (i.e. "fine dust"/
+"ultra-fine dust") maps only to a PM10/PM2.5 pair, and this board's
+three-tier naming doesn't confirm where the extra tier or a PM1 reading
+actually fits. The adding-device-support skill's read-side rule says
+leave unit/device_class unset when the dump gives no field that
+nominates one -- a wrong guess would silently mislabel every reading
+forever, and the write-side rejection safety net doesn't cover reads.
+Exposed as plain `measurement` sensors named after the device's own
+field instead (matching air_purifier.AIR_QUALITY's existing precedent).
+"""
+from datetime import time as dt_time
+
+from ..capability import Capability
+from ..entities import BinarySensorDesc, SensorDesc, SwitchDesc, TimeDesc
+from .air_purifier import _AIR_QUALITY_SENSORS
+from .common import int_or_none, sensor_item_value
+
+
+SENSORS = Capability(
+    href='/sensors/vs/0',
+    poll_tier='warm',
+    entities=tuple(
+        SensorDesc(key=key, field='x.com.samsung.da.items', icon=icon,
+                   state_class='measurement',
+                   value_fn=lambda items, t=sensor_type: sensor_item_value(items, t))
+        for key, icon, sensor_type in _AIR_QUALITY_SENSORS
+    ) + (
+        SensorDesc(key='co2', field='x.com.samsung.da.items',
+                   device_class='carbon_dioxide', state_class='measurement',
+                   unit='ppm',
+                   value_fn=lambda items: sensor_item_value(items, 'CO2')),
+    ),
+)
+
+HUMIDITY = Capability(
+    href='/humidity/vs/0',
+    poll_tier='warm',
+    entities=(
+        SensorDesc(key='humidity', field='x.com.samsung.da.humidity',
+                   device_class='humidity', state_class='measurement',
+                   unit='%', value_fn=int_or_none),
+    ),
+)
+
+BATTERY = Capability(
+    href='/energy/battery/vs/0',
+    poll_tier='warm',
+    entities=(
+        SensorDesc(key='battery', field='x.com.samsung.da.battery',
+                   device_class='battery', state_class='measurement',
+                   unit='%', entity_category='diagnostic',
+                   value_fn=int_or_none),
+        BinarySensorDesc(key='battery_charging', field='x.com.samsung.da.charging',
+                          device_class='battery_charging',
+                          entity_category='diagnostic',
+                          value_fn=lambda v: v == 'On'),
+    ),
+)
+
+AIR_QUALITY_STANDARD = Capability(
+    href='/airqualitystandard/vs/0',
+    poll_tier='cold',
+    entities=(
+        SensorDesc(key='air_quality_standard', field='x.com.samsung.da.standard',
+                   entity_category='diagnostic'),
+    ),
+)
+
+
+def _parse_hms(v):
+    """'HH:MM:SS' -> datetime.time, same contract as laundry._parse_hm but
+    tolerant of the trailing ':SS' this board's dnd start/end times carry."""
+    if not v:
+        return None
+    try:
+        parts = v.split(':')
+        return dt_time(int(parts[0]), int(parts[1]))
+    except (ValueError, IndexError):
+        return None
+
+
+def _dnd_time_write(field):
+    def _write(p, rep, href=None):
+        return ['dnd', 'vs', '0'], {field: f'{p.hour:02d}:{p.minute:02d}:00'}
+    return _write
+
+
+# Issue #210: no idle-vs-active dump pair exists for this href (only one
+# dump total, DND never toggled in it), so this write contract is an
+# educated guess, not a confirmed one -- symmetric with the read side
+# (writing the same 'true'/'false' string shape and 'HH:MM:SS' format the
+# device itself reports back) rather than invented from nothing, but still
+# needs a reporter to actually flip it on real hardware and confirm. See
+# the adding-device-support skill's "Educated guesses are fine" section.
+DND = Capability(
+    href='/dnd/vs/0',
+    poll_tier='cold',
+    entities=(
+        SwitchDesc(key='dnd', field='x.com.samsung.da.value',
+                   icon='mdi:sleep',
+                   entity_category='config',
+                   value_fn=lambda v: v == 'true',
+                   write_fn=lambda p, rep, href=None: (
+                       ['dnd', 'vs', '0'],
+                       {'x.com.samsung.da.value': 'true' if p == 'On' else 'false'})),
+        TimeDesc(key='dnd_start', field='x.com.samsung.da.startTime',
+                 icon='mdi:clock-start',
+                 entity_category='config',
+                 value_fn=_parse_hms,
+                 write_fn=_dnd_time_write('x.com.samsung.da.startTime')),
+        TimeDesc(key='dnd_end', field='x.com.samsung.da.endTime',
+                 icon='mdi:clock-end',
+                 entity_category='config',
+                 value_fn=_parse_hms,
+                 write_fn=_dnd_time_write('x.com.samsung.da.endTime')),
+    ),
+)
+
+# ---------------------------------------------------------------------------
+# Air-monitor-scoped coverage: hrefs with no explainable live state,
+# following the 'don't guess' rule.
+# ---------------------------------------------------------------------------
+_AM_IGNORED = [
+    # A single bare integer ('keepnormal': 0) with no description, no
+    # supported-values list, and no second dump to compare against -- opaque.
+    '/keepnormalstate/vs/0',
+    # {'remove': ''} -- looks like data-sink/cache-clearing plumbing, not a
+    # live user-facing field.
+    '/sensordatasinks/vs/0',
+]
+
+COVERAGE = [Capability(href=h) for h in _AM_IGNORED]

custom_components/localthings/registry/capabilities/airconditioner.py

@@ -380,6 +380,29 @@ def _option_number_write(prefix):
     return write
 
 
+def _odor_controller_active(rep):
+    """Odor-controller self-clean on/off, from the `SmartCoolClean_<On/Off>`
+    /mode/vs/0 option token -- corroborated against the SmartThings cloud
+    custom.airConditionerOdorController capability's airConditionerOdorController
+    State field, same on/off vocabulary and a matching name ("Smart Cool
+    Clean" mirrors "odor controller"). Unconditional across board
+    generations, same as beep above -- no evidence ties this token to the
+    legacy-vs-newer split _has_option_token gates on. Read-only: no command
+    capability is confirmed, so this stays a sensor rather than a guessed
+    write (the 'don't guess' rule)."""
+    tok = _option_token(rep, 'SmartCoolClean')
+    if tok is None:
+        return None
+    return tok == 'On'
+
+
+def _odor_controller_progress(rep):
+    """0-100 progress of the odor-controller self-clean cycle, from the
+    `ProgressSmartClean_<N>` option token -- mirrors the cloud
+    airConditionerOdorControllerProgress field."""
+    return _int(_option_token(rep, 'ProgressSmartClean'))
+
+
 def _humidity(rep):
     """Relative humidity, preferring the 5%-rounded field where it exists.
 
@@ -582,6 +605,21 @@ CLIMATE = Capability(
                    exists_fn=_has_option_token('FilterTime'),
                    device_class='duration', unit='h',
                    state_class='measurement', icon='mdi:air-filter'),
+        # Odor-controller ("Smart Cool Clean") state + progress -- see
+        # _odor_controller_active's docstring for the cloud-capability
+        # correspondence. Present on TP1X_DA-AC-RAC-01001 (issue reporter's
+        # dump); gating is token presence only, not board generation.
+        BinarySensorDesc(key='odor_controller_active',
+                          rep_fn=_odor_controller_active,
+                          exists_fn=lambda rep, resources: (
+                              _option_token(rep, 'SmartCoolClean') is not None),
+                          icon='mdi:air-filter', entity_category='diagnostic'),
+        SensorDesc(key='odor_controller_progress',
+                   rep_fn=_odor_controller_progress,
+                   exists_fn=lambda rep, resources: (
+                       _option_token(rep, 'ProgressSmartClean') is not None),
+                   unit='%', state_class='measurement',
+                   icon='mdi:progress-check', entity_category='diagnostic'),
     ),
 )
 

custom_components/localthings/registry/capabilities/common.py

@@ -228,8 +228,9 @@ def sensor_item_value(items, sensor_type, index=0):
     """Pull one reading out of a `/sensors/vs/0`-style items[] list -- each
     item is `{type, value: [...]}`; `index` picks which slot of a possibly
     multi-value reading to read (index 0 is the raw measurement on every
-    family seen so far). Shared by range_hood.AIR_QUALITY and
-    air_purifier.AIR_QUALITY, which read the same resource shape."""
+    family seen so far). Shared by range_hood.AIR_QUALITY,
+    air_purifier.AIR_QUALITY, and air_monitor.SENSORS, which all read the
+    same resource shape against the same {type, sensor_type} keys."""
     for item in items or ():
         if not isinstance(item, dict):
             continue
@@ -301,11 +302,19 @@ POWER_VS_FALLBACK = Capability(
 KIDS_LOCK_GENERIC = Capability(
     href='/kidslock/0',
     entities=(
-        SwitchDesc(key='child_lock', field='value',
-                   device_class='lock',
-                   value_fn=lambda v: bool(v),
-                   write_fn=lambda p, rep, href=None: (
-                       ['kidslock', '0'], {'value': p == 'On'})),
+        # Read-only like KIDS_LOCK_VS_FALLBACK (issues #181/#183) -- not a
+        # SwitchDesc. SwitchDesc's `device_class='lock'` was never honored
+        # by HA (its switch platform only accepts 'outlet'/'switch'),
+        # leaving a plain switch whose 'On' state meant different things
+        # on different boards. As a BinarySensorDesc with `device_class='lock'`,
+        # both kids-lock surfaces read with the same polarity: 'On' means
+        # open/unlocked, per HA's lock device_class. The inversion in
+        # value_fn here (and in the fallback below) keeps the on-the-wire
+        # truth (value=False on /kidslock/0, kidsLock='Ready' on /kidslock/vs/0
+        # both mean kids lock NOT active) consistent with that polarity.
+        BinarySensorDesc(key='child_lock', field='value',
+                         device_class='lock',
+                         value_fn=lambda v: not bool(v)),
     ),
 )
 
@@ -313,12 +322,19 @@ KIDS_LOCK_VS_FALLBACK = Capability(
     href='/kidslock/vs/0',
     match_fn=lambda rep, resources: '/kidslock/0' not in resources,
     entities=(
-        SwitchDesc(key='child_lock', field='x.com.samsung.da.kidsLock',
-                   device_class='lock',
-                   value_fn=lambda v: v != 'Ready',
-                   write_fn=lambda p, rep, href=None: (
-                       ['kidslock', 'vs', '0'],
-                       {'x.com.samsung.da.kidsLock': 'Enable' if p == 'On' else 'Ready'})),
+        # Read-only, not a SwitchDesc (issues #181/#183): the write side of
+        # this capability wrote 'Enable', a value no dump in the fixture
+        # corpus has ever reported back -- every one reports either 'Ready'
+        # or 'Run', so it was never a confirmed contract. #181's reporter
+        # confirmed this directly: writing the *correct* value ('Run')
+        # still 4.05s, and the SmartThings app itself has no control for
+        # it either -- the resource is genuinely read-only on this
+        # hardware, not just wrong-valued. Polarity matches
+        # KIDS_LOCK_GENERIC above -- 'On' means open/unlocked, so
+        # kidsLock='Ready' (kids lock NOT active) renders as 'On'.
+        BinarySensorDesc(key='child_lock', field='x.com.samsung.da.kidsLock',
+                         device_class='lock',
+                         value_fn=lambda v: v == 'Ready'),
     ),
 )
 

custom_components/localthings/registry/capabilities/operational.py

@@ -90,7 +90,14 @@ def _finish_time(rep):
     total_s = _remaining_seconds(rep.get('x.com.samsung.da.remainingTime'))
     if not total_s:
         return None
-    return datetime.now(timezone.utc) + timedelta(seconds=total_s)
+    # Round to whole minutes -- remainingTime itself only has minute
+    # resolution, but datetime.now() always carries fresh seconds/
+    # microseconds, so an unrounded result changes on nearly every poll
+    # even when the device-reported remaining time hasn't. That floods
+    # the recorder history/logbook with values that look identical once
+    # the UI rounds them down for display.
+    finish = datetime.now(timezone.utc) + timedelta(seconds=total_s)
+    return finish.replace(second=0, microsecond=0)
 
 
 def _completion_minutes(rep):
@@ -156,7 +163,7 @@ OPERATIONAL_STATE = Capability(
         # firmware leaves a stale remainingTime after a cycle ends, and
         # freezes it at '00:01:00' when progress reaches 'Finish'.
         SensorDesc(key='finish_time', device_class='timestamp',
-                   rep_fn=_finish_time),
+                   hysteresis=True, rep_fn=_finish_time),
                    
         SensorDesc(key='completion_minutes',
                    icon='mdi:clock-outline', unit='min',

custom_components/localthings/registry/capabilities/range_hood.py

@@ -79,6 +79,15 @@ def _hood_fan_write(payload, rep, href=None):
             str(code)
             for code in rep.get('x.com.samsung.da.hood.supportedFanSpeed', ())
         ]
+        if not supported:
+            min_s = rep.get('x.com.samsung.da.hood.settableMinFanSpeed')
+            max_s = rep.get('x.com.samsung.da.hood.settableMaxFanSpeed')
+            if min_s is not None and max_s is not None:
+                try:
+                    mn, mx = int(min_s), int(max_s)
+                    supported = [str(i) for i in range(mn, mx + 1)]
+                except (ValueError, TypeError):
+                    pass
         if value not in supported:
             return None
         return ['hood', 'fanspeed', 'vs', '0'], {

custom_components/localthings/registry/capabilities/water_purifier.py

@@ -175,11 +175,23 @@ FAVORITE_HOTWATER = Capability(
                    write_fn=lambda p, rep, href=None: (
                        ['favorite', 'hotwater', 'vs', '0'],
                        {'x.com.samsung.da.switchHotwater': 'Locked' if p == 'On' else 'Unlocked'})),
+        # Issue #196: `supportedList` is only the four *fixed* presets
+        # (e.g. ['40', '75', '85', '90']) -- the SmartThings app also lets
+        # the user add one custom value to their own display list via its
+        # "temperatures to display" editor (a wheel picker bounded by
+        # /setting/waterpurifier/vs/0's hotwaterRange, separate resource),
+        # and that custom value shows up in `showList`
+        # (['40', '50', '75', '85', '90'] here) but never in
+        # `supportedList`. Reading options from `supportedList` meant a
+        # unit whose current default *was* that custom value rendered as
+        # "unknown" -- not a coverage gap, just the wrong field. `showList`
+        # is a superset of `supportedList` that always includes whatever
+        # the current default actually is, custom or not.
         SelectDesc(key='favorite_hotwater_temperature',
                    field='x.com.samsung.da.favorite.defaultTemperature',
                    icon='mdi:thermometer',
                    entity_category='config',
-                   options_field='x.com.samsung.da.favorite.supportedList',
+                   options_field='x.com.samsung.da.favorite.showList',
                    write_fn=lambda p, rep, href=None: (
                        ['favorite', 'hotwater', 'vs', '0'],
                        {'x.com.samsung.da.favorite.defaultTemperature': p})),

custom_components/localthings/registry/entities.py

@@ -57,6 +57,11 @@ class SensorDesc(SamsungEntityDescription):
     unit: Optional[str] = None
     unit_fn: Optional[Callable[[dict], str]] = None  # overrides `unit` from the live rep, when set
     options: Optional[tuple] = None  # required by HA when device_class == 'enum'
+    # Opt-in: gate this sensor's reported value behind the user-configurable
+    # CONF_FINISH_TIME_HYSTERESIS_MINUTES threshold (see sensor.py). Only for
+    # values that are expected to jitter around their "true" value between
+    # device-side revisions -- not a general-purpose flag every sensor should set.
+    hysteresis: bool = False
 
 
 @dataclass(frozen=True, kw_only=True)

custom_components/localthings/sensor.py

@@ -1,6 +1,8 @@
 """Sensor platform for Local Things."""
 from __future__ import annotations
 
+from datetime import timedelta
+
 from homeassistant.components.sensor import SensorEntity, SensorDeviceClass, SensorStateClass
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import EntityCategory
@@ -12,7 +14,7 @@ from homeassistant.helpers.update_coordinator import CoordinatorEntity
 from .observe import MODE_OBSERVE, MODE_POLL
 from .registry.entities import SensorDesc
 
-from .const import DOMAIN
+from .const import CONF_FINISH_TIME_HYSTERESIS_MINUTES, DEFAULT_FINISH_TIME_HYSTERESIS_MINUTES, DOMAIN
 from .coordinator import LocalThingsCoordinator
 from .entity import LocalThingsEntity, _is_included
 
@@ -42,6 +44,7 @@ class LocalThingsSensor(LocalThingsEntity, SensorEntity):
         self._attr_state_class = desc.state_class
         if desc.options:
             self._attr_options = list(desc.options)
+        self._hysteresis_value = None
 
     @property
     def native_unit_of_measurement(self):
@@ -52,7 +55,38 @@ class LocalThingsSensor(LocalThingsEntity, SensorEntity):
 
     @property
     def native_value(self):
-        return (self.coordinator.data or {}).get(self._state_key)
+        raw = (self.coordinator.data or {}).get(self._state_key)
+        if not self._bound.desc.hysteresis:
+            return raw
+        return self._apply_hysteresis(raw)
+
+    def _apply_hysteresis(self, raw):
+        """Hold the last value this entity actually reported until a new one
+        differs by at least the configured threshold, regardless of how long
+        that difference has been building up (this is a deadband, not a
+        time-based debounce).
+
+        Values like finish_time are `now() + remaining`, recomputed from
+        scratch every poll -- both wall-clock drift between the device's own
+        remaining-time updates and the device revising its own estimate mid-
+        cycle produce a stream of small, real changes that are individually
+        meaningless but each trigger a recorder/logbook entry. A cycle
+        ending (raw is None) or starting (cache empty) always passes through
+        immediately -- only in-between jitter while a value already exists
+        on both sides gets held back.
+        """
+        threshold_min = self.coordinator.config_entry.options.get(
+            CONF_FINISH_TIME_HYSTERESIS_MINUTES, DEFAULT_FINISH_TIME_HYSTERESIS_MINUTES
+        )
+        if (
+            threshold_min
+            and raw is not None
+            and self._hysteresis_value is not None
+            and abs(raw - self._hysteresis_value) < timedelta(minutes=threshold_min)
+        ):
+            return self._hysteresis_value
+        self._hysteresis_value = raw
+        return raw
 
 
 class LocalThingsConnectionModeSensor(CoordinatorEntity[LocalThingsCoordinator], SensorEntity):

custom_components/localthings/translations/en.json

@@ -10,12 +10,18 @@
       "automatic_operation": {
         "name": "Automatic operation"
       },
+      "battery_charging": {
+        "name": "Charging"
+      },
       "burner_hot_surface": {
         "name": "Burner {number} hot surface"
       },
       "burner_pan_detected": {
         "name": "Burner {number} pan detected"
       },
+      "child_lock": {
+        "name": "Child lock"
+      },
       "cloud_connected": {
         "name": "Cloud connected"
       },
@@ -34,6 +40,9 @@
       "overload_protection_active": {
         "name": "Overload protection active"
       },
+      "odor_controller_active": {
+        "name": "Odor controller active"
+      },
       "cycle_active": {
         "name": "Running"
       },
@@ -292,19 +301,25 @@
           "01": "Normal",
           "06": "Time dry",
           "16": "Cotton",
+          "17": "Super Speed",
           "18": "Synthetics",
           "19": "Delicates",
           "20": "Iron dry",
-          "23": "Quick Dry 35",
+          "21": "Hygiene Care",
+          "22": "Silent Dry",
+          "23": "Quick Dry 35'",
           "24": "Cool air",
           "25": "Warm air",
           "27": "Time dry",
+          "29": "AI Dry",
           "1a": "Wool",
           "1b": "Bedding",
           "1c": "Shirts",
           "1d": "Towels",
           "1e": "Outdoor",
-          "1f": "Mixed load"
+          "1f": "Mixed load",
+          "2b": "Self Tub Dry",
+          "4c": "Air Refresh"
         }
       },
       "favorite_capacity": {
@@ -600,6 +615,9 @@
       "air_filter_usage_hours": {
         "name": "Filter usage hours"
       },
+      "air_quality_standard": {
+        "name": "Air quality standard"
+      },
       "air_sensing_state": {
         "name": "Air sensing state"
       },
@@ -612,12 +630,18 @@
       "automatic_ventilation_state": {
         "name": "Automatic ventilation state"
       },
+      "battery": {
+        "name": "Battery"
+      },
       "burner_state": {
         "name": "Burner {number} state"
       },
       "clean_level": {
         "name": "Clean level"
       },
+      "co2": {
+        "name": "CO2"
+      },
       "coffee_brew_status": {
         "name": "Coffee brew status"
       },
@@ -646,6 +670,9 @@
       "outdoor_temperature": {
         "name": "Outdoor temperature"
       },
+      "odor_controller_progress": {
+        "name": "Odor controller progress"
+      },
       "panel_status": {
         "name": "Panel status"
       },
@@ -996,6 +1023,9 @@
       "display_light": {
         "name": "Display light"
       },
+      "dnd": {
+        "name": "Do not disturb"
+      },
       "fast_preheat": {
         "name": "Fast preheat"
       },
@@ -1079,6 +1109,12 @@
       }
     },
     "time": {
+      "dnd_end": {
+        "name": "Do not disturb end"
+      },
+      "dnd_start": {
+        "name": "Do not disturb start"
+      },
       "led_night_end": {
         "name": "Door LED night end"
       },
@@ -1138,15 +1174,16 @@
       "init": {
         "title": "LocalThings options",
         "menu_options": {
-          "settings": "Remote control write settings",
+          "settings": "Device settings",
           "debug_write": "Debug: write to a resource"
         }
       },
       "settings": {
-        "title": "Remote control write settings",
-        "description": "Some devices accept certain writes (e.g. default detergent/softener dosing on a washer) even while reporting remote control off. By default, LocalThings blocks every write with a clear error whenever a device reports remote control off, rather than letting the device silently reject it. Only enable this if you've confirmed writes actually work on this device with remote control off -- otherwise you'll trade that clear error for a silent failure.",
+        "title": "Device settings",
+        "description": "Some devices accept certain writes (e.g. default detergent/softener dosing on a washer) even while reporting remote control off. By default, LocalThings blocks every write with a clear error whenever a device reports remote control off, rather than letting the device silently reject it. Only enable this if you've confirmed writes actually work on this device with remote control off -- otherwise you'll trade that clear error for a silent failure.\n\nEstimated finish time is recomputed from the device's remaining-time estimate on every poll, which can drift or get revised by a minute or two between updates. Raise the minimum-change value below to hold the sensor at its last reported value until the estimate moves by at least that many minutes, cutting down on history/logbook noise. Set it to 0 to report every computed change.",
         "data": {
-          "bypass_remote_control_lock": "Allow writes even when remote control is reported off"
+          "bypass_remote_control_lock": "Allow writes even when remote control is reported off",
+          "finish_time_hysteresis_minutes": "Estimated finish -- minimum change (minutes)"
         }
       },
       "debug_write": {

custom_components/localthings/translations/nl.json

@@ -10,11 +10,17 @@
       "automatic_operation": {
         "name": "Automatische werking"
       },
+      "battery_charging": {
+        "name": "Opladen"
+      },
       "burner_hot_surface": {
         "name": "Brander {number} heet oppervlak"
       },
       "burner_pan_detected": {
-        "name": "Brander {number} pan gedetecteerd"
+        "name": "Pan gedetecteerd op brander {number}"
+      },
+      "child_lock": {
+        "name": "Kinderslot"
       },
       "cloud_connected": {
         "name": "Verbonden met cloud"
@@ -23,7 +29,7 @@
         "name": "Stofzak vol"
       },
       "cooktop_power": {
-        "name": "Kookplaat voeding"
+        "name": "Voeding kookplaat"
       },
       "cooktop_safety_shutoff_enabled": {
         "name": "Automatische uitschakeling heet oppervlak ingeschakeld"
@@ -34,6 +40,9 @@
       "overload_protection_active": {
         "name": "Overbelastingsbeveiliging actief"
       },
+      "odor_controller_active": {
+        "name": "Geurbeheersing actief"
+      },
       "cycle_active": {
         "name": "Actief"
       },
@@ -74,7 +83,7 @@
         "name": "Schenken"
       },
       "alarm_in_mute": {
-        "name": "Alarm bij dempen"
+        "name": "Alarmdemping"
       },
       "power_state": {
         "name": "Voedingsstatus"
@@ -215,7 +224,7 @@
         }
       },
       "cooler_temperature_setpoint": {
-        "name": "Koeler temperatuur"
+        "name": "Temperatuur koelgedeelte"
       },
       "day_brightness": {
         "name": "Helderheid kast",
@@ -292,19 +301,25 @@
           "01": "Normaal",
           "06": "Tijdprogramma",
           "16": "Katoen",
+          "17": "Super Speed",
           "18": "Synthetisch",
           "19": "Fijne was",
           "20": "Strijkdroog",
+          "21": "Hygiënisch drogen",
+          "22": "Stil drogen",
           "23": "Snel drogen 35'",
           "24": "Koude lucht",
           "25": "Warme lucht",
           "27": "Tijdprogramma",
+          "29": "AI drogen",
           "1a": "Wol",
           "1b": "Beddengoed",
           "1c": "Overhemden",
           "1d": "Handdoeken",
           "1e": "Outdoor",
-          "1f": "Gemengde was"
+          "1f": "Gemengde was",
+          "2b": "Zelf trommel drogen",
+          "4c": "Opfrissen"
         }
       },
       "favorite_capacity": {
@@ -481,24 +496,24 @@
       "sound_mode": {
         "name": "Geluidsmodus",
         "state": {
-          "voice": "Spraak",
+          "voice": "Stem",
           "tone": "Toon",
-          "mute": "Dempen"
+          "mute": "Stil"
         }
       },
       "air_purifier_sound_mode": {
         "name": "Geluidsmodus",
         "state": {
-          "mute": "Dempen",
+          "mute": "Stil",
           "buzzer": "Zoemer"
         }
       },
       "water_purifier_sound_mode": {
         "name": "Geluidsmodus",
         "state": {
-          "voice": "Spraak",
+          "voice": "Stem",
           "fixedtone": "Vaste toon",
-          "mute": "Dempen"
+          "mute": "Stil"
         }
       },
       "spin_speed": {
@@ -561,17 +576,17 @@
           "53": "Intensief",
           "54": "Handdoeken",
           "55": "Sportkleding",
-          "57": "Fijn",
+          "57": "Fijne was",
           "5e": "Spoelen+centrifugeren",
-          "60": "Zelfreinigend+",
+          "60": "Self Clean+",
           "65": "Bonte was",
           "66": "Spijkergoed",
           "7c": "Witte was",
-          "7d": "Beddengoed/Waterdicht",
-          "7e": "Zelfreinigend",
-          "7f": "Wol/Fijn",
+          "7d": "Beddengoed/waterdicht",
+          "7e": "Self Clean",
+          "7f": "Wol/fijne was",
           "86": "Diep wassen",
-          "87": "Downloaden",
+          "87": "Gedownload",
           "8f": "Intensief koud",
           "96": "Minder microvezels"
         }
@@ -600,6 +615,9 @@
       "air_filter_usage_hours": {
         "name": "Filterverbruik (uren)"
       },
+      "air_quality_standard": {
+        "name": "Luchtkwaliteitsnorm"
+      },
       "air_sensing_state": {
         "name": "Status luchtmeting"
       },
@@ -612,12 +630,18 @@
       "automatic_ventilation_state": {
         "name": "Status automatische ventilatie"
       },
+      "battery": {
+        "name": "Batterij"
+      },
       "burner_state": {
         "name": "Status brander {number}"
       },
       "clean_level": {
         "name": "Reinigingsniveau"
       },
+      "co2": {
+        "name": "CO2"
+      },
       "coffee_brew_status": {
         "name": "Koffiezetstatus"
       },
@@ -629,7 +653,7 @@
         }
       },
       "cooktop_running_state": {
-        "name": "Loopstatus kookplaat"
+        "name": "Bedrijfsstatus kookplaat"
       },
       "cooktop_state": {
         "name": "Status kookplaat"
@@ -646,6 +670,9 @@
       "outdoor_temperature": {
         "name": "Buitentemperatuur"
       },
+      "odor_controller_progress": {
+        "name": "Voortgang geurbeheersing"
+      },
       "panel_status": {
         "name": "Paneelstatus"
       },
@@ -662,10 +689,10 @@
         "name": "Status steel"
       },
       "uvc_operation_time": {
-        "name": "UV-C bedrijfstijd"
+        "name": "UV-C-bedrijfstijd"
       },
       "uvc_total_operation_time": {
-        "name": "UV-C totale bedrijfstijd"
+        "name": "Totale UV-C-bedrijfstijd"
       },
       "uvc_finished_time": {
         "name": "UV-C voltooid op"
@@ -759,7 +786,7 @@
         "name": "Geschatte eindtijd"
       },
       "completion_minutes": {
-        "name": "Voltooiingstijd"
+        "name": "Resterende tijd"
       },
       "freezer_temperature": {
         "name": "Vriezertemperatuur"
@@ -840,13 +867,13 @@
         "name": "Vermogen"
       },
       "probe_battery": {
-        "name": "Sonde batterij"
+        "name": "Batterijniveau sonde"
       },
       "probe_target_temperature": {
         "name": "Doeltemperatuur sonde"
       },
       "probe_temperature": {
-        "name": "Temperatuur sonde"
+        "name": "Sondetemperatuur"
       },
       "progress": {
         "name": "Voortgang"
@@ -888,7 +915,7 @@
         "name": "Status"
       },
       "cup_state": {
-        "name": "Kopstatus"
+        "name": "Bekerstatus"
       },
       "last_pour_type": {
         "name": "Laatste schenktype"
@@ -996,6 +1023,9 @@
       "display_light": {
         "name": "Displayverlichting"
       },
+      "dnd": {
+        "name": "Niet storen"
+      },
       "fast_preheat": {
         "name": "Snel voorverwarmen"
       },
@@ -1024,7 +1054,7 @@
         "name": "{instance_name} ingeschakeld"
       },
       "intensive": {
-        "name": "Intensive"
+        "name": "Intensief"
       },
       "lamp": {
         "name": "Lamp"
@@ -1079,6 +1109,12 @@
       }
     },
     "time": {
+      "dnd_end": {
+        "name": "Einde niet storen"
+      },
+      "dnd_start": {
+        "name": "Start niet storen"
+      },
       "led_night_end": {
         "name": "Einde nachtverlichting deur-LED"
       },
@@ -1138,15 +1174,16 @@
       "init": {
         "title": "LocalThings-opties",
         "menu_options": {
-          "settings": "Schrijfinstellingen voor afstandsbediening",
+          "settings": "Apparaatinstellingen",
           "debug_write": "Foutopsporing: naar een resource schrijven"
         }
       },
       "settings": {
-        "title": "Schrijfinstellingen voor afstandsbediening",
-        "description": "Sommige apparaten accepteren bepaalde schrijfbewerkingen (bijvoorbeeld de standaarddosering van wasmiddel of wasverzachter op een wasmachine), ook als ze melden dat de afstandsbediening is uitgeschakeld. LocalThings blokkeert standaard elke schrijfbewerking met een duidelijke foutmelding wanneer een apparaat meldt dat de afstandsbediening is uitgeschakeld, in plaats van het apparaat de opdracht stilzwijgend te laten weigeren. Schakel deze optie alleen in als je hebt bevestigd dat schrijfbewerkingen op dit apparaat echt werken wanneer de afstandsbediening is uitgeschakeld. Anders verruil je de duidelijke foutmelding voor een stille mislukking.",
+        "title": "Apparaatinstellingen",
+        "description": "Sommige apparaten accepteren bepaalde schrijfbewerkingen (bijvoorbeeld de standaarddosering van wasmiddel of wasverzachter op een wasmachine), ook als ze melden dat de afstandsbediening is uitgeschakeld. LocalThings blokkeert standaard elke schrijfbewerking met een duidelijke foutmelding wanneer een apparaat meldt dat de afstandsbediening is uitgeschakeld, in plaats van het apparaat de opdracht stilzwijgend te laten weigeren. Schakel deze optie alleen in als je hebt bevestigd dat schrijfbewerkingen op dit apparaat echt werken wanneer de afstandsbediening is uitgeschakeld. Anders verruil je de duidelijke foutmelding voor een stille mislukking.\n\nDe geschatte eindtijd wordt bij elke poll opnieuw berekend op basis van de resterende tijd die het apparaat opgeeft, wat kan afwijken of met een minuut of wat worden bijgesteld tussen updates. Verhoog de minimale wijziging hieronder om de sensor op zijn laatst gerapporteerde waarde te houden totdat de schatting met minstens dat aantal minuten verandert, wat de ruis in geschiedenis/logboek vermindert. Zet op 0 om elke berekende wijziging te rapporteren.",
         "data": {
-          "bypass_remote_control_lock": "Schrijfbewerkingen toestaan wanneer afstandsbediening als uitgeschakeld wordt gemeld"
+          "bypass_remote_control_lock": "Schrijfbewerkingen toestaan wanneer afstandsbediening als uitgeschakeld wordt gemeld",
+          "finish_time_hysteresis_minutes": "Geschatte eindtijd -- minimale wijziging (minuten)"
         }
       },
       "debug_write": {

tests/fixtures/air_dresser_tp1_21_device.json

@@ -0,0 +1,414 @@
+{
+  "device0": [
+    {
+      "rt": [
+        "x.com.samsung.devcol",
+        "oic.wk.col"
+      ],
+      "if": [
+        "oic.if.baseline",
+        "oic.if.ll",
+        "oic.if.b"
+      ]
+    },
+    {
+      "href": "/airdresseroption/sanitize/vs/0",
+      "rep": {}
+    },
+    {
+      "href": "/alarms/vs/0",
+      "rep": {}
+    },
+    {
+      "href": "/buzzersound/vs/0",
+      "rep": {
+        "supportedBuzzerSound": [
+          "Off",
+          "On"
+        ],
+        "setBuzzerSound": "On"
+      }
+    },
+    {
+      "href": "/configuration/vs/0",
+      "rep": {
+        "x.com.samsung.da.region": "1117000000",
+        "x.com.samsung.da.countryCode": "KR"
+      }
+    },
+    {
+      "href": "/connectionconfig/vs/0",
+      "rep": {
+        "autoReconnectionMinVersion": "1.0",
+        "autoReconnection": "true",
+        "autoReconnectionProtocolType": [
+          "helper_hotspot",
+          "ble_ocf"
+        ],
+        "supportedWiFiAuthType": [
+          "OPEN",
+          "WEP",
+          "WPA-PSK",
+          "WPA2-PSK",
+          "SAE"
+        ],
+        "supportedWiFiCryptoType": [
+          "TKIP",
+          "AES",
+          "WEP-64",
+          "WEP-128"
+        ],
+        "supportedWiFiFreq": [
+          "2.4G"
+        ],
+        "calmConnectionCare": {
+          "version": "1.0",
+          "role": [
+            "things"
+          ]
+        }
+      }
+    },
+    {
+      "href": "/course/vs/0",
+      "rep": {
+        "x.com.samsung.da.supportedModes": [
+          "HOMECARE_WIZARD_V2"
+        ],
+        "x.com.samsung.da.options": [
+          "DeviceType_015E",
+          "UpdateAllow_NotAllowed",
+          "Course_01",
+          "AiOption_On",
+          "SteamPush_None",
+          "SeamlessControl_Disable",
+          "KidsLockBypass_On",
+          "FilterUsage_384001D4",
+          "WashingTimes_2",
+          "DrumCleanProposal_30",
+          "SpecialFunction_16",
+          "AvailableDelayTime_0",
+          "ProgressTimeSet_AA012CB20348",
+          "WrinklePreventRunning_Off",
+          "SendToDevice_Off",
+          "WeatherPush_On",
+          "GMT_12",
+          "DelayEndSet_0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0FF0F0F0F0F0F0F0F00F0F0F0F0F",
+          "EnergyLevelSet_05020404010103040301020203020101040505050503030303030303050204050405",
+          "WrinklePreventSet_0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0FF00F0F0F0F0F0F0F0F0F0F0FF0F0",
+          "SavingModeCondition_01010205272B2C2D2E0300",
+          "SavingMode_Off",
+          "UsagesDB_ok",
+          "DrumCleanLog_Empty"
+        ],
+        "x.com.samsung.da.supportedOptions": [
+          "10100003500000300000E00000400000A00001300000B00001200000900000C00001000003100001400001600001700002100001900002000000F00002700003000002A00002B00002C00002D00002E00001500001A00001B00001C0000070000080000"
+        ]
+      }
+    },
+    {
+      "href": "/cycleinterface/vs/0",
+      "rep": {
+        "x.com.samsung.da.cycleInterfaceEnabled": "Off"
+      }
+    },
+    {
+      "href": "/diagnosis/vs/0",
+      "rep": {
+        "x.com.samsung.da.diagnosisStart": "Ready"
+      }
+    },
+    {
+      "href": "/drlc/0",
+      "rep": {
+        "DRLevel": 0,
+        "start": "0000-00-00T00:00:00Z",
+        "duration": 0,
+        "override": false
+      }
+    },
+    {
+      "href": "/drlc/vs/0",
+      "rep": {
+        "x.com.samsung.da.drlcLevel": "0",
+        "x.com.samsung.da.durationminutes": "0",
+        "x.com.samsung.da.start": "0000-00-00T00:00:00Z",
+        "x.com.samsung.da.override": "Off",
+        "x.com.samsung.da.realSaving": "Off"
+      }
+    },
+    {
+      "href": "/energy/consumption/0",
+      "rep": {}
+    },
+    {
+      "href": "/energy/consumption/vs/0",
+      "rep": {
+        "x.com.samsung.da.instantaneousPower": "-500",
+        "x.com.samsung.da.instantaneousPowerUnit": "W",
+        "x.com.samsung.da.cumulativePower": "2900",
+        "x.com.samsung.da.cumulativeUnit": "Wh",
+        "x.com.samsung.da.cumulativeDate": "1785362400",
+        "x.com.samsung.da.cumulativeDateUTC": "1785330000",
+        "x.com.samsung.da.cumulativeSavedPower": "0"
+      }
+    },
+    {
+      "href": "/file/information/vs/0",
+      "rep": {
+        "x.com.samsung.timeoffset": "+00:00"
+      }
+    },
+    {
+      "href": "/information/vs/0",
+      "rep": {
+        "x.com.samsung.da.modelNum": "DA_DF_TP1_21_COMMON|20313841|380101020016111F42C3000200010000",
+        "x.com.samsung.da.description": "DA_DF_TP1_21_COMMON_DF3000B/DC92-03252A_0002",
+        "x.com.samsung.da.serialNum": "REDACTED",
+        "x.com.samsung.da.otnDUID": "REDACTED",
+        "x.com.samsung.da.diagProtocolType": "BLE_OCF",
+        "x.com.samsung.da.diagLogType": [
+          "errCode",
+          "dump"
+        ],
+        "x.com.samsung.da.diagDumpType": "file",
+        "x.com.samsung.da.diagEndPoint": "SSM",
+        "x.com.samsung.da.diagMnid": "0AJT",
+        "x.com.samsung.da.diagSetupid": "WA0",
+        "x.com.samsung.da.diagMinVersion": "3.0",
+        "x.com.samsung.da.diagTsId": "DA01",
+        "x.com.samsung.da.items": [
+          {
+            "x.com.samsung.da.id": "0",
+            "x.com.samsung.da.description": "DA_DF_TP1_21_COMMON|20313841|380101020016111F42C3000200010000",
+            "x.com.samsung.da.type": "Software",
+            "x.com.samsung.da.number": "03101A260513(A440)",
+            "x.com.samsung.da.newVersionAvailable": "0"
+          },
+          {
+            "x.com.samsung.da.id": "1",
+            "x.com.samsung.da.description": "Firmware_1_DB_20313841241127210FFFFF203252412402215804FFFF(015E2031384120325241_30241204)(FileDown:0)(Type:0)",
+            "x.com.samsung.da.type": "Firmware",
+            "x.com.samsung.da.number": "03138A24112721,03252A24022158",
+            "x.com.samsung.da.newVersionAvailable": "0"
+          },
+          {
+            "x.com.samsung.da.id": "2",
+            "x.com.samsung.da.description": "Firmware_2_DB_2031574122122007043FFF2032114122122704042FFF(015E2031574120321141_30000000)(FileDown:0)(Type:0)",
+            "x.com.samsung.da.type": "Firmware",
+            "x.com.samsung.da.number": "03157A22122007,03211A22122704"
+          },
+          {
+            "x.com.samsung.da.id": "3",
+            "x.com.samsung.da.description": "Firmware_3_DB_20303242000000020AFFFFFFFFFFFFFFFFFFFFFFFFFF(015E20303242FFFFFFFF_30000000)(FileDown:0)(Type:0)",
+            "x.com.samsung.da.type": "Firmware",
+            "x.com.samsung.da.number": "03032B00000002,FFFFFFFFFFFFFF"
+          }
+        ]
+      }
+    },
+    {
+      "href": "/kidslock/0",
+      "rep": {
+        "value": false
+      }
+    },
+    {
+      "href": "/kidslock/vs/0",
+      "rep": {
+        "x.com.samsung.da.kidsLock": "Ready"
+      }
+    },
+    {
+      "href": "/operational/state/0",
+      "rep": {
+        "currentMachineState": "REDACTED",
+        "machineStates": "REDACTED",
+        "jobStates": [
+          "None",
+          "Steaming",
+          "Airwashing",
+          "Drying",
+          "Finish"
+        ],
+        "currentJobState": "None",
+        "remainingTime": "00:35:00",
+        "progressPercentage": "1"
+      }
+    },
+    {
+      "href": "/operational/state/vs/0",
+      "rep": {
+        "x.com.samsung.da.state": "Ready",
+        "x.com.samsung.da.remainingTime": "00:35:00",
+        "x.com.samsung.da.progressPercentage": "1",
+        "x.com.samsung.da.progress": "None",
+        "x.com.samsung.da.delayEndTime": "00:00:00",
+        "x.com.samsung.da.supportedProgress": [
+          "None",
+          "Steaming",
+          "Airwashing",
+          "Drying",
+          "Finish"
+        ]
+      }
+    },
+    {
+      "href": "/otninformation/vs/0",
+      "rep": {
+        "x.com.samsung.da.target": "",
+        "x.com.samsung.da.newVersionAvailable": "false",
+        "x.com.samsung.da.newVersionNo": "00000000",
+        "x.com.samsung.da.currentVersionInfo": "00000000",
+        "otnStatus": "None",
+        "flashingProgress": "",
+        "otnTarget": "main",
+        "otnCompleteDate": "2026-07-07",
+        "otnList": [
+          {
+            "type": "WIFI",
+            "modelId": "DA_DF_TP1_21_COMMON",
+            "versions": [
+              "30260513"
+            ],
+            "visVersion": "260513"
+          },
+          {
+            "type": "Micom",
+            "modelId": "015E2031384120325241",
+            "versions": [
+              "24112721",
+              "24022158"
+            ],
+            "visVersion": "241127"
+          },
+          {
+            "type": "Micom",
+            "modelId": "015E2031574120321141",
+            "versions": [
+              "22122007",
+              "22122704"
+            ],
+            "visVersion": "221227"
+          },
+          {
+            "type": "Micom",
+            "modelId": "015E20303242FFFFFFFF",
+            "versions": [
+              "2",
+              "FFFFFFFF"
+            ],
+            "visVersion": "2"
+          }
+        ]
+      }
+    },
+    {
+      "href": "/power/0",
+      "rep": {
+        "value": false
+      }
+    },
+    {
+      "href": "/power/vs/0",
+      "rep": {
+        "x.com.samsung.da.power": "Off"
+      }
+    },
+    {
+      "href": "/quickcontrol/info/vs/0",
+      "rep": {
+        "supportedVersion": "1.0"
+      }
+    },
+    {
+      "href": "/realtimenotiforclient/vs/0",
+      "rep": {
+        "x.com.samsung.da.timeforshortnoti": "0",
+        "x.com.samsung.da.periodicnotisubscription": "true"
+      }
+    },
+    {
+      "href": "/remotectrl/0",
+      "rep": {
+        "value": false
+      }
+    },
+    {
+      "href": "/remotectrl/vs/0",
+      "rep": {
+        "x.com.samsung.da.remoteControlEnabled": "false"
+      }
+    },
+    {
+      "href": "/st/airdressercourse/vs/0",
+      "rep": {
+        "x.com.samsung.da.st.airdresserMode": "Table_00_Course_01",
+        "x.com.samsung.da.st.courseTable": "Table_00"
+      }
+    },
+    {
+      "href": "/timezone/vs/0",
+      "rep": {
+        "timezoneid": "Asia/Seoul",
+        "offset": "+09:00",
+        "DST": "OFF"
+      }
+    },
+    {
+      "href": "/washer/vs/0",
+      "rep": {
+        "x.com.samsung.da.wrinklePrevent": "Off"
+      }
+    },
+    {
+      "href": "/wirelessinfo/vs/0",
+      "rep": {
+        "macaddressWiFi": "REDACTED",
+        "macaddressBLE": "REDACTED"
+      }
+    },
+    {
+      "href": "/wm/editcourse/vs/0",
+      "rep": {
+        "x.com.samsung.da.editCourseList": "EditCourseList_0135030E040A130B12090C10311416172119200F27302A2B2C2D2E151A1B1C0708",
+        "x.com.samsung.da.fixedCourseList": "FixedCourseList_01270F"
+      }
+    },
+    {
+      "href": "/wm/jobbeginingstatus/vs/0",
+      "rep": {}
+    },
+    {
+      "href": "/wm/personalcourse/vs/0",
+      "rep": {
+        "x.com.samsung.da.courses": [
+          "F1_00",
+          "F2_00",
+          "F3_00",
+          "F4_00",
+          "F5_00",
+          "F6_00",
+          "F7_00",
+          "F8_00",
+          "F9_00",
+          "FA_00"
+        ],
+        "x.com.samsung.da.maxCourseNum": "10"
+      }
+    },
+    {
+      "href": "/wm/setinfo/vs/0",
+      "rep": {
+        "x.com.samsung.da.isModelSettingWithoutSC": "false",
+        "x.com.samsung.da.aiCourse": "false",
+        "x.com.samsung.da.isModelSettingPowerOnOff": "true",
+        "x.com.samsung.da.modelCode": "M(None),W(None)"
+      }
+    },
+    {
+      "href": "/wm/welcomemsg/vs/0",
+      "rep": {}
+    }
+  ]
+}

tests/fixtures/air_monitor_device.json

@@ -0,0 +1,184 @@
+{
+  "device0": [
+    {
+      "rt": [
+        "x.com.samsung.devcol",
+        "oic.wk.col"
+      ],
+      "if": [
+        "oic.if.baseline",
+        "oic.if.ll",
+        "oic.if.b"
+      ]
+    },
+    {
+      "href": "/airqualitystandard/vs/0",
+      "rep": {
+        "x.com.samsung.da.standard": "AirCleanAssociation"
+      }
+    },
+    {
+      "href": "/alarms/vs/0",
+      "rep": {
+        "x.com.samsung.da.items": [
+          {
+            "x.com.samsung.da.id": "0",
+            "x.com.samsung.da.description": "Version",
+            "x.com.samsung.da.alarmType": "Device",
+            "x.com.samsung.da.code": "ErrorCode_OFF",
+            "x.com.samsung.da.triggeredTime": "2026-07-30T02:42:57",
+            "x.com.samsung.da.state": "Deleted"
+          }
+        ],
+        "rt": [
+          "x.com.samsung.da.alarms"
+        ],
+        "if": [
+          "oic.if.baseline",
+          "oic.if.a"
+        ]
+      }
+    },
+    {
+      "href": "/dnd/vs/0",
+      "rep": {
+        "x.com.samsung.da.value": "false",
+        "x.com.samsung.da.startTime": "14:00:00",
+        "x.com.samsung.da.endTime": "22:00:00",
+        "x.com.samsung.da.visible": "true"
+      }
+    },
+    {
+      "href": "/energy/battery/vs/0",
+      "rep": {
+        "x.com.samsung.da.battery": "80",
+        "x.com.samsung.da.batteryResolution": "1",
+        "x.com.samsung.da.charging": "Off"
+      }
+    },
+    {
+      "href": "/humidity/vs/0",
+      "rep": {
+        "x.com.samsung.da.humidity": "57",
+        "x.com.samsung.da.validity": "Valid"
+      }
+    },
+    {
+      "href": "/information/vs/0",
+      "rep": {
+        "x.com.samsung.da.modelNum": "ASM-KR-TP1-22-ACMB1M|10243041|75000000001611C40800020000080000",
+        "x.com.samsung.da.description": "ASM-KR-TP1-22-ACMB1M",
+        "x.com.samsung.da.serialNum": "REDACTED",
+        "x.com.samsung.da.otnDUID": "REDACTED",
+        "x.com.samsung.da.items": [
+          {
+            "x.com.samsung.da.id": "0",
+            "x.com.samsung.da.description": "Version",
+            "x.com.samsung.da.type": "Software",
+            "x.com.samsung.da.number": "02443A260310",
+            "x.com.samsung.da.newVersionAvailable": "0"
+          },
+          {
+            "x.com.samsung.da.id": "1",
+            "x.com.samsung.da.description": "Version",
+            "x.com.samsung.da.type": "Firmware",
+            "x.com.samsung.da.number": "22050300",
+            "x.com.samsung.da.newVersionAvailable": "0"
+          }
+        ],
+        "x.com.samsung.da.diagProtocolType": "WIFI_HTTPS",
+        "x.com.samsung.da.diagLogType": [
+          "errCode",
+          "dump"
+        ],
+        "x.com.samsung.da.diagDumpType": "file",
+        "x.com.samsung.da.diagEndPoint": "SSM",
+        "x.com.samsung.da.diagMnid": "0AJT",
+        "x.com.samsung.da.diagSetupid": "AM0",
+        "x.com.samsung.da.diagMinVersion": "1.0"
+      }
+    },
+    {
+      "href": "/keepnormalstate/vs/0",
+      "rep": {
+        "x.com.samsung.da.keepnormal": 0
+      }
+    },
+    {
+      "href": "/realtimenotiforclient/vs/0",
+      "rep": {
+        "x.com.samsung.da.timeforshortnoti": "0",
+        "x.com.samsung.da.longnotisubscription": "true",
+        "x.com.samsung.da.periodicnotisubscription": "true"
+      }
+    },
+    {
+      "href": "/sensordatasinks/vs/0",
+      "rep": {
+        "remove": ""
+      }
+    },
+    {
+      "href": "/sensors/vs/0",
+      "rep": {
+        "x.com.samsung.da.cleanLevel": "2",
+        "x.com.samsung.da.refresh": "Off",
+        "x.com.samsung.da.lastSensingTime": "1785379376",
+        "x.com.samsung.da.items": [
+          {
+            "x.com.samsung.da.id": "0",
+            "x.com.samsung.da.description": "Sensor for CleanLevel",
+            "x.com.samsung.da.type": "CleanLevel",
+            "x.com.samsung.da.value": [
+              "2"
+            ]
+          },
+          {
+            "x.com.samsung.da.id": "1",
+            "x.com.samsung.da.description": "Sensor for Odor",
+            "x.com.samsung.da.type": "Odor",
+            "x.com.samsung.da.value": [
+              "1"
+            ]
+          },
+          {
+            "x.com.samsung.da.id": "2",
+            "x.com.samsung.da.description": "Sensor for Dust",
+            "x.com.samsung.da.type": "Dust",
+            "x.com.samsung.da.value": [
+              "31",
+              "2"
+            ]
+          },
+          {
+            "x.com.samsung.da.id": "3",
+            "x.com.samsung.da.description": "Sensor for FineDust",
+            "x.com.samsung.da.type": "FineDust",
+            "x.com.samsung.da.value": [
+              "23",
+              "2"
+            ]
+          },
+          {
+            "x.com.samsung.da.id": "4",
+            "x.com.samsung.da.description": "Sensor for SuperFineDust",
+            "x.com.samsung.da.type": "SuperFineDust",
+            "x.com.samsung.da.value": [
+              "18",
+              "2"
+            ]
+          },
+          {
+            "x.com.samsung.da.id": "5",
+            "x.com.samsung.da.description": "Sensor for CO2",
+            "x.com.samsung.da.type": "CO2",
+            "x.com.samsung.da.value": [
+              "498",
+              "1"
+            ]
+          }
+        ]
+      }
+    }
+  ]
+}

tests/fixtures/airconditioner_tp1x_rac_odor_controller_device.json

@@ -0,0 +1,575 @@
+{
+  "device0": [
+    {},
+    {
+      "href": "/aisleep/vs/0",
+      "rep": {
+        "x.com.samsung.da.displayNightMode": "Off",
+        "x.com.samsung.da.elapsedTime": "0",
+        "x.com.samsung.da.requestFeedback": "Off",
+        "x.com.samsung.da.resultFeedback": 0,
+        "x.com.samsung.da.statusFeedback": "Idle",
+        "x.com.samsung.da.sleepTime": "14002200"
+      }
+    },
+    {
+      "href": "/alarms/vs/0",
+      "rep": {
+        "x.com.samsung.da.items": [
+          {
+            "x.com.samsung.da.id": "0",
+            "x.com.samsung.da.alarmType": "Device",
+            "x.com.samsung.da.code": "ErrorCode_OFF",
+            "x.com.samsung.da.triggeredTime": "2026-07-31T12:54:20",
+            "x.com.samsung.da.state": "Deleted"
+          },
+          {
+            "x.com.samsung.da.id": "1",
+            "x.com.samsung.da.alarmType": "Device",
+            "x.com.samsung.da.code": "FilterAlarm_OFF",
+            "x.com.samsung.da.triggeredTime": "2026-07-31T12:54:20",
+            "x.com.samsung.da.state": "Deleted"
+          }
+        ],
+        "rt": [
+          "x.com.samsung.da.alarms"
+        ],
+        "if": [
+          "oic.if.baseline",
+          "oic.if.a"
+        ]
+      }
+    },
+    {
+      "href": "/availablecontrolsets/vs/0",
+      "rep": {
+        "x.com.samsung.da.sets": "AE3F00A0012C01610248000F0000",
+        "x.com.samsung.da.id": "RAC",
+        "x.com.samsung.da.version": "1.0"
+      }
+    },
+    {
+      "href": "/configuration/vs/0",
+      "rep": {
+        "x.com.samsung.da.region": "0000000000",
+        "x.com.samsung.da.airconOptionList": [
+          "PRODUCT_GLOBAL",
+          "AI_GLOBAL_HEATPUMP_4.0",
+          "AI_3.0",
+          "Auto_To_AI",
+          "AI_Heat",
+          "ENERGY_2.0",
+          "HOMECARE_WIZARD_V2",
+          "DR",
+          "SingleCommand_1"
+        ]
+      }
+    },
+    {
+      "href": "/da/softreset/vs/0",
+      "rep": {
+        "x.com.samsung.da.softwarereset": "false"
+      }
+    },
+    {
+      "href": "/drlc/vs/0",
+      "rep": {
+        "x.com.samsung.da.start": "1970-01-01T00:00:00Z",
+        "x.com.samsung.da.override": "Off",
+        "x.com.samsung.da.durationminutes": "0",
+        "x.com.samsung.da.drlcLevel": "0"
+      }
+    },
+    {
+      "href": "/electriccurrent/vs/0",
+      "rep": {
+        "operation": "Off",
+        "modes": "3",
+        "supportedModes": [
+          "3",
+          "4",
+          "5",
+          "6",
+          "7",
+          "8",
+          "9"
+        ]
+      }
+    },
+    {
+      "href": "/energy/consumption/vs/0",
+      "rep": {
+        "x.com.samsung.da.cumulativeDate": "1785502435",
+        "x.com.samsung.da.cumulativeUnit": "Wh",
+        "x.com.samsung.da.instantaneousPowerUnit": "W"
+      }
+    },
+    {
+      "href": "/file/information/vs/0",
+      "rep": {
+        "x.com.samsung.timeoffset": "+02:00",
+        "x.com.samsung.supprtedtype": 1
+      }
+    },
+    {
+      "href": "/filter/airdustfilter/vs/0",
+      "rep": {
+        "x.com.samsung.da.filterUsageResolution": "1",
+        "x.com.samsung.da.filterCapacity": "500",
+        "x.com.samsung.da.filterCapacityUnit": "Hour",
+        "x.com.samsung.da.filterResetType": [
+          "replaceable",
+          "washable"
+        ],
+        "x.com.samsung.da.filterStatus": "normal",
+        "x.com.samsung.da.filterUsage": "44",
+        "x.com.samsung.da.filterDesiredUsage": "500",
+        "x.com.samsung.da.supportedFilterDesiredUsage": [
+          "180",
+          "300",
+          "500",
+          "700"
+        ]
+      }
+    },
+    {
+      "href": "/humidity/vs/0",
+      "rep": {
+        "x.com.samsung.da.humidity": "0",
+        "x.com.samsung.da.fivepercentHumidity": "53"
+      }
+    },
+    {
+      "href": "/information/vs/0",
+      "rep": {
+        "x.com.samsung.da.otnDUID": "**REDACTED**",
+        "x.com.samsung.da.modelNum": "TP1X_DA-AC-RAC-01001_0000|10267841|60010514001911010E00492200902000",
+        "x.com.samsung.da.description": "TP1X_DA-AC-RAC-01001_0000",
+        "x.com.samsung.da.serialNum": "**REDACTED**",
+        "x.com.samsung.da.serialNumOption": "**REDACTED**",
+        "x.com.samsung.da.items": [
+          {
+            "x.com.samsung.da.id": "0",
+            "x.com.samsung.da.description": "Version",
+            "x.com.samsung.da.type": "Software",
+            "x.com.samsung.da.number": "02762A260401",
+            "x.com.samsung.da.newVersionAvailable": "0"
+          },
+          {
+            "x.com.samsung.da.id": "1",
+            "x.com.samsung.da.description": "Version",
+            "x.com.samsung.da.type": "Firmware",
+            "x.com.samsung.da.newVersionAvailable": "0",
+            "x.com.samsung.da.number": "02678A24092500,FFFFFFFFFFFFFF"
+          },
+          {
+            "x.com.samsung.da.id": "2",
+            "x.com.samsung.da.description": "Version",
+            "x.com.samsung.da.type": "Firmware",
+            "x.com.samsung.da.newVersionAvailable": "0",
+            "x.com.samsung.da.number": "FFFFFFFFFFFFFF,FFFFFFFFFFFFFF"
+          },
+          {
+            "x.com.samsung.da.id": "3",
+            "x.com.samsung.da.description": "Version",
+            "x.com.samsung.da.type": "Firmware",
+            "x.com.samsung.da.newVersionAvailable": "0",
+            "x.com.samsung.da.number": "FFFFFFFFFFFFFF,FFFFFFFFFFFFFF"
+          }
+        ],
+        "x.com.samsung.da.diagDumpType": "file",
+        "x.com.samsung.da.diagEndPoint": "SSM",
+        "x.com.samsung.da.diagLogType": [
+          "errCode",
+          "dump"
+        ],
+        "x.com.samsung.da.diagMnid": "0AJT",
+        "x.com.samsung.da.diagSetupid": "AR2",
+        "x.com.samsung.da.diagProtocolType": "BLE_OCF",
+        "x.com.samsung.da.diagMinVersion": "3.0",
+        "x.com.samsung.da.diagTsId": "DA01"
+      }
+    },
+    {
+      "href": "/keepnormalstate/vs/0",
+      "rep": {
+        "x.com.samsung.da.keepnormal": 1
+      }
+    },
+    {
+      "href": "/light/vs/0",
+      "rep": {
+        "mode": "On",
+        "supportedModes": [
+          "On",
+          "Off"
+        ]
+      }
+    },
+    {
+      "href": "/mds/absencemonitoring/vs/0",
+      "rep": {}
+    },
+    {
+      "href": "/mds/absencestate/vs/0",
+      "rep": {}
+    },
+    {
+      "href": "/mode/convenient/vs/0",
+      "rep": {
+        "x.com.samsung.da.modes": "Off",
+        "x.com.samsung.da.supportedModes": [
+          "Off",
+          "Sleep",
+          "Quiet",
+          "Speed",
+          "Nano",
+          "NanoSleep"
+        ]
+      }
+    },
+    {
+      "href": "/mode/vs/0",
+      "rep": {
+        "x.com.samsung.da.modes": [
+          "Cool"
+        ],
+        "workingMode": "Cool",
+        "x.com.samsung.da.supportedModes": [
+          "Auto",
+          "Cool",
+          "Dry",
+          "Fan",
+          "Heat"
+        ],
+        "x.com.samsung.da.options": [
+          "OptionCode_35880",
+          "Sleep_0",
+          "ArtificialWorking_Off",
+          "ComfortAICooling_Off",
+          "AiTempChanged_Off",
+          "AiTemp_240",
+          "Volume_Mute",
+          "StopAutoClean_Idle",
+          "SmartCoolClean_Off",
+          "ProgressSmartClean_0",
+          "FreezeAlarmSetting_Off",
+          "DesiredFreezeAlarm_240",
+          "WashAlarm_Off",
+          "ExtendOptionCode_215693",
+          "UpdateAllow_NotAllowed",
+          "DurationOn_240",
+          "OutdoorTemp_99",
+          "CoolCapa_20",
+          "WarmCapa_22",
+          "Autoclean_On",
+          "WelcomeCoolingState_Off",
+          "WelcomeHeatingState_Off",
+          "OutdoorConnection_Connected"
+        ],
+        "rt": [
+          "x.com.samsung.da.mode"
+        ],
+        "if": [
+          "oic.if.baseline",
+          "oic.if.a"
+        ]
+      }
+    },
+    {
+      "href": "/option/airpurify/vs/0",
+      "rep": {
+        "x.com.samsung.da.modes": "Off",
+        "x.com.samsung.da.supportedModes": [
+          "On",
+          "Off"
+        ],
+        "rt": [
+          "x.com.samsung.da.option.airpurify"
+        ],
+        "if": [
+          "oic.if.baseline",
+          "oic.if.a"
+        ]
+      }
+    },
+    {
+      "href": "/option/autoclean/vs/0",
+      "rep": {
+        "x.com.samsung.da.status": "Stop",
+        "x.com.samsung.da.supportedStatus": [
+          "Start",
+          "Stop"
+        ],
+        "x.com.samsung.da.progress": "0",
+        "x.com.samsung.da.settingStatus": "On",
+        "x.com.samsung.da.supportedSettingStatus": [
+          "On",
+          "Off"
+        ]
+      }
+    },
+    {
+      "href": "/option/muteonce/vs/0",
+      "rep": {
+        "muteonce": "Off",
+        "rt": [
+          "x.com.samsung.da.option.muteonce"
+        ],
+        "if": [
+          "oic.if.baseline",
+          "oic.if.a"
+        ]
+      }
+    },
+    {
+      "href": "/personality/presence/vs/0",
+      "rep": {}
+    },
+    {
+      "href": "/power/vs/0",
+      "rep": {
+        "x.com.samsung.da.power": "On",
+        "operationNumber": "4"
+      }
+    },
+    {
+      "href": "/realtimenotiforclient/vs/0",
+      "rep": {
+        "x.com.samsung.da.timeforshortnoti": "0",
+        "x.com.samsung.da.longnotisubscription": "false",
+        "x.com.samsung.da.periodicnotisubscription": "true"
+      }
+    },
+    {
+      "href": "/remotedatacontrol/vs/0",
+      "rep": {
+        "x.com.samsung.da.status": "Off",
+        "x.com.samsung.da.connectionStatus": "Disconnected"
+      }
+    },
+    {
+      "href": "/remotetemperature/vs/0",
+      "rep": {
+        "x.com.samsung.da.temperature": "",
+        "x.com.samsung.da.unit": "",
+        "x.com.samsung.da.error": ""
+      }
+    },
+    {
+      "href": "/reserverulesets/vs/0",
+      "rep": {
+        "x.com.samsung.da.sets": "AEFFFFFFFF101E121EFFFF101EFFFF000001001F00010000001F0000009C00FFFF1E00",
+        "x.com.samsung.da.id": "RAC",
+        "x.com.samsung.da.version": "1.0"
+      }
+    },
+    {
+      "href": "/selfcheck/vs/0",
+      "rep": {
+        "x.com.samsung.da.supportedActions": [
+          "Start",
+          "Cancel"
+        ],
+        "x.com.samsung.da.error": [
+          "DA_ERROR_NONE"
+        ]
+      }
+    },
+    {
+      "href": "/temperature/control/vs/0",
+      "rep": {
+        "x.com.samsung.da.increment": "1"
+      }
+    },
+    {
+      "href": "/temperatures/vs/0",
+      "rep": {
+        "x.com.samsung.da.items": [
+          {
+            "x.com.samsung.da.id": "0",
+            "x.com.samsung.da.description": "Temperature",
+            "x.com.samsung.da.current": "24.0",
+            "x.com.samsung.da.desired": "24.0",
+            "x.com.samsung.da.minimum": "16",
+            "x.com.samsung.da.maximum": "30",
+            "x.com.samsung.da.increment": "1",
+            "x.com.samsung.da.unit": "Celsius"
+          }
+        ]
+      }
+    },
+    {
+      "href": "/welcome/temperature/vs/0",
+      "rep": {
+        "operatingStatus": "None",
+        "requestId": "0000"
+      }
+    },
+    {
+      "href": "/wind/direction/vs/0",
+      "rep": {
+        "x.com.samsung.da.modes": "All",
+        "x.com.samsung.da.supportedModes": [
+          "Fix",
+          "Up_And_Low",
+          "Left_And_Right",
+          "All"
+        ]
+      }
+    },
+    {
+      "href": "/wind/strength/vs/0",
+      "rep": {
+        "x.com.samsung.da.modes": "3",
+        "x.com.samsung.da.supportedModes": [
+          "0",
+          "1",
+          "2",
+          "3",
+          "4"
+        ],
+        "x.com.samsung.da.modesName": [
+          "Auto",
+          "Low",
+          "Mid",
+          "High",
+          "Turbo"
+        ]
+      }
+    },
+    {
+      "href": "/otninformation/vs/0",
+      "rep": {
+        "x.com.samsung.da.target": "",
+        "x.com.samsung.da.newVersionAvailable": "false",
+        "otnStatus": "None",
+        "flashingProgress": "0",
+        "otnCompleteDate": "noHistory",
+        "scheduledTime": "None",
+        "swVersionInfo": {
+          "platform": "Tizen Lite",
+          "oneUiVersion": "7.0 Air conditioner",
+          "osVersion": "4.0"
+        },
+        "otnList": [
+          {
+            "type": "WIFI",
+            "modelId": "ARA-KR-TP1-25-ARXX00",
+            "versions": [
+              "11260401"
+            ],
+            "visVersion": "260401"
+          },
+          {
+            "type": "Micom",
+            "modelId": "845210267841FFFFFFFF",
+            "versions": [
+              "24092500",
+              "FFFFFFFF"
+            ],
+            "visVersion": "240925"
+          },
+          {
+            "type": "Micom",
+            "modelId": "045210267841FFFFFFFF",
+            "versions": [
+              "24092500",
+              "FFFFFFFF"
+            ],
+            "visVersion": "240925"
+          },
+          {
+            "type": "Micom",
+            "modelId": "FGCAN2",
+            "versions": [
+              "",
+              ""
+            ],
+            "visVersion": "999999"
+          },
+          {
+            "type": "Micom",
+            "modelId": "FGCAN3",
+            "versions": [
+              "",
+              ""
+            ],
+            "visVersion": "999999"
+          }
+        ]
+      }
+    },
+    {
+      "href": "/timezone/vs/0",
+      "rep": {
+        "timezoneid": "Europe/Prague",
+        "offset": "+02:00",
+        "DST": "ON"
+      }
+    },
+    {
+      "href": "/connectionconfig/vs/0",
+      "rep": {
+        "autoReconnectionMinVersion": "1.0",
+        "autoReconnection": "true",
+        "autoReconnectionProtocolType": [
+          "helper_hotspot",
+          "ble_ocf"
+        ],
+        "supportedWiFiAuthType": [
+          "OPEN",
+          "WEP",
+          "WPA-PSK",
+          "WPA2-PSK",
+          "SAE"
+        ],
+        "supportedWiFiCryptoType": [
+          "TKIP",
+          "AES",
+          "WEP-64",
+          "WEP-128"
+        ],
+        "supportedWiFiFreq": [
+          "2.4G"
+        ],
+        "calmConnectionCare": {
+          "version": "1.0",
+          "role": [
+            "things"
+          ]
+        }
+      }
+    },
+    {
+      "href": "/wirelessinfo/vs/0",
+      "rep": {
+        "macaddressWiFi": "**REDACTED**",
+        "macaddressBLE": "**REDACTED**",
+        "connectedApSsid": "REDACTED_SSID"
+      }
+    },
+    {
+      "href": "/quickcontrol/info/vs/0",
+      "rep": {
+        "supportedVersion": "1.0"
+      }
+    },
+    {
+      "href": "/dginformation/vs/0",
+      "rep": {
+        "enrolmentstatus": "Unknown",
+        "devicestate": "Unknown",
+        "lockstatus": "Unknown",
+        "nextduedate": "",
+        "workingminutes": 0,
+        "paymentinfo": {
+          "emiplan": "Unknown",
+          "currency": "Unknown",
+          "totalemi": 0,
+          "totalemipaid": 0
+        }
+      }
+    }
+  ]
+}

tests/fixtures/golden/air_dresser_tp1_21.json

@@ -0,0 +1,24 @@
+{
+  "state_keys": [
+    "alarm_code",
+    "buzzer_sound",
+    "child_lock",
+    "completion_minutes",
+    "cycle",
+    "cycle_active",
+    "delay_start_hours",
+    "diagnosis_status",
+    "energy_kwh",
+    "energy_saved_kwh",
+    "finish_time",
+    "firmware_update",
+    "job_beginning_status",
+    "machine_state",
+    "power_switch",
+    "progress",
+    "progress_percentage",
+    "remote_control",
+    "sanitize",
+    "wrinkle_prevent"
+  ]
+}

tests/fixtures/golden/air_monitor.json

@@ -0,0 +1,18 @@
+{
+  "state_keys": [
+    "air_quality_standard",
+    "alarm_code",
+    "battery",
+    "battery_charging",
+    "clean_level",
+    "co2",
+    "dnd",
+    "dnd_end",
+    "dnd_start",
+    "dust",
+    "fine_dust",
+    "humidity",
+    "odor",
+    "super_fine_dust"
+  ]
+}

tests/fixtures/golden/airconditioner_ara_ww_tp1_22.json

@@ -14,6 +14,8 @@
     "firmware_update",
     "humidity",
     "mute_once",
+    "odor_controller_active",
+    "odor_controller_progress",
     "power_watts",
     "tropical_night_mode"
   ]

tests/fixtures/golden/airconditioner_cac.json

@@ -20,6 +20,8 @@
     "motion_detect_wind_active",
     "motion_detect_wind_mode",
     "mute_once",
+    "odor_controller_active",
+    "odor_controller_progress",
     "power_watts",
     "selfcheck_error",
     "selfcheck_result",

tests/fixtures/golden/airconditioner_fac_bora.json

@@ -13,6 +13,8 @@
     "energy_kwh",
     "firmware_update",
     "humidity",
+    "odor_controller_active",
+    "odor_controller_progress",
     "power_energy_kwh",
     "power_watts",
     "tropical_night_mode"

tests/fixtures/golden/airconditioner_fac_bora_205_flat.json

@@ -13,6 +13,8 @@
     "energy_kwh",
     "firmware_update",
     "humidity",
+    "odor_controller_active",
+    "odor_controller_progress",
     "power_energy_kwh",
     "power_watts",
     "tropical_night_mode"

tests/fixtures/golden/airconditioner_fac_bora_2in1.json

@@ -13,6 +13,8 @@
     "energy_kwh",
     "firmware_update",
     "humidity",
+    "odor_controller_active",
+    "odor_controller_progress",
     "power_energy_kwh",
     "power_watts",
     "subdevice_6c2dff6dee5cdad16a5e000000000001_climate",

tests/fixtures/golden/airconditioner_lnx_rac_heatpump.json

@@ -18,6 +18,8 @@
     "motion_detect_wind_active",
     "motion_detect_wind_mode",
     "mute_once",
+    "odor_controller_active",
+    "odor_controller_progress",
     "power_watts",
     "tropical_night_mode"
   ]

tests/fixtures/golden/airconditioner_tp1x_rac_01001.json

@@ -14,6 +14,8 @@
     "firmware_update",
     "humidity",
     "mute_once",
+    "odor_controller_active",
+    "odor_controller_progress",
     "power_watts",
     "tropical_night_mode"
   ]

tests/fixtures/golden/airconditioner_tp1x_rac_odor_controller.json

@@ -0,0 +1,26 @@
+{
+  "state_keys": [
+    "air_filter_status",
+    "air_filter_threshold",
+    "air_filter_usage",
+    "air_filter_usage_hours",
+    "air_purify",
+    "alarm_code",
+    "auto_clean",
+    "beep",
+    "climate",
+    "current_limit_enabled",
+    "current_limit_level",
+    "current_temperature_c",
+    "display_light",
+    "firmware_update",
+    "humidity",
+    "mute_once",
+    "odor_controller_active",
+    "odor_controller_progress",
+    "selfcheck_error",
+    "selfcheck_result",
+    "selfcheck_status",
+    "tropical_night_mode"
+  ]
+}

tests/fixtures/golden/airconditioner_windfree_oscillation.json

@@ -15,6 +15,8 @@
     "firmware_update",
     "humidity",
     "mute_once",
+    "odor_controller_active",
+    "odor_controller_progress",
     "overload_protection_active",
     "overload_protection_mode",
     "selfcheck_error",

tests/fixtures/water_purifier_ailite_25k_device.json

@@ -166,7 +166,7 @@
       "href": "/favorite/hotwater/vs/0",
       "rep": {
         "x.com.samsung.da.favorite.revision": "0",
-        "x.com.samsung.da.favorite.defaultTemperature": "85",
+        "x.com.samsung.da.favorite.defaultTemperature": "50",
         "x.com.samsung.da.favorite.showList": [
           "40",
           "50",

tests/localthings/test_config_flow.py

@@ -539,3 +539,18 @@ def test_is_placeholder_serial_accepts_real_serials():
     from custom_components.localthings.config_flow import _is_placeholder_serial
     assert _is_placeholder_serial('0A1B2C3D4E5F') is False
     assert _is_placeholder_serial('') is False
+
+
+def test_is_placeholder_serial_catches_all_same_hex_digit():
+    """Issue #189: the DA_WM_A51_20_COMMON (ARTIK051) laundry board family
+    reports a flash-unset sentinel instead of 'Nothing(SVC)' -- every
+    character the same repeated hex digit. A washer and a dryer, two
+    different physical units, both reported the literal serialNum
+    'FFFFFFFFFFFFFFF', colliding on the config-entry unique_id."""
+    from custom_components.localthings.config_flow import _is_placeholder_serial
+    assert _is_placeholder_serial('FFFFFFFFFFFFFFF') is True
+    assert _is_placeholder_serial('ffffffffffffffff') is True
+    assert _is_placeholder_serial('00000000') is True
+    # Too short to be the flash-unset sentinel -- a real serial could
+    # plausibly repeat one hex digit seven times by chance.
+    assert _is_placeholder_serial('FFFFFFF') is False

tests/localthings/test_coordinator.py

@@ -15,7 +15,7 @@ from custom_components.localthings.const import (
     SUMMARY_INTERVAL_S,
 )
 from custom_components.localthings.coordinator import (
-    LocalThingsCoordinator, _local_source_port,
+    LocalThingsCoordinator, _is_placeholder_serial, _local_source_port,
 )
 from custom_components.localthings.registry.capabilities.common import (
     remote_control_enabled,
@@ -163,6 +163,44 @@ def test_run_discovery_falls_back_to_host_for_placeholder_serial(
     assert coordinator.device_serial == mock_entry.data[CONF_HOST]
 
 
+def test_run_discovery_falls_back_to_host_for_all_f_placeholder_serial(
+    hass: HomeAssistant, mock_entry
+) -> None:
+    """Issue #189: the DA_WM_A51_20_COMMON (ARTIK051) laundry board family
+    reports a flash-unset sentinel instead of 'Nothing(SVC)' -- every
+    character the same repeated hex digit. A washer and a dryer, two
+    different physical units, both reported the literal serialNum
+    'FFFFFFFFFFFFFFF', so without this fallback they'd collide on
+    device_serial exactly like the #83 case above."""
+    resources = {
+        '/information/vs/0': {
+            'x.com.samsung.da.modelNum':
+                'DA_WM_A51_20_COMMON|20221341|30010102001211000103000000000000',
+            'x.com.samsung.da.description':
+                'DA_WM_A51_20_COMMON_DVE50A8800/DC92-02835A_0080',
+            'x.com.samsung.da.serialNum': 'FFFFFFFFFFFFFFF',
+        },
+        '/otninformation/vs/0': {},
+    }
+    coordinator = LocalThingsCoordinator(hass, mock_entry)
+    coordinator._run_discovery(resources)
+    assert coordinator.device_serial == mock_entry.data[CONF_HOST]
+
+
+def test_is_placeholder_serial_catches_all_same_hex_digit():
+    assert _is_placeholder_serial('FFFFFFFFFFFFFFF') is True
+    assert _is_placeholder_serial('ffffffffffffffff') is True
+    assert _is_placeholder_serial('00000000') is True
+
+
+def test_is_placeholder_serial_accepts_real_serials_and_short_runs():
+    assert _is_placeholder_serial('0A1B2C3D4E5F') is False
+    assert _is_placeholder_serial('') is False
+    # Too short to be the flash-unset sentinel -- a real serial could
+    # plausibly repeat one hex digit seven times by chance.
+    assert _is_placeholder_serial('FFFFFFF') is False
+
+
 def test_run_discovery_detects_cooktop_via_resource_signature(
     hass: HomeAssistant, mock_entry
 ) -> None:

tests/test_air_dresser_tp1_21_capabilities.py

@@ -0,0 +1,79 @@
+"""Tests for the DA_DF_TP1_21_COMMON AirDresser (model DF3000B, issue #208).
+
+Another board generation routed into the same air_dresser registry as
+issue #162's DA_DF_A51_20_COMMON and issue #157's DA_DF_TP2_20_COMMON.
+Exercises the one thing this board reports that neither of those does:
+a populated /buzzersound/vs/0 (laundry.BUZZER_SOUND) -- the reporter's
+actual ask ("all cycles are represented by code") is a course-code
+labelling problem, not a coverage one; this board's course table isn't
+identified yet either (same as #162's), so 'cycle' still renders as the
+raw code until a reporter can map codes to names in the SmartThings app.
+"""
+from custom_components.localthings.registry.adapter import flatten
+from custom_components.localthings.registry.by_type import air_dresser, for_device_by_model
+from custom_components.localthings.registry.discovery import discover
+
+from tests.conftest import _load_device
+
+
+def _air_dresser():
+    resources = _load_device('air_dresser_tp1_21')
+    info = resources['/information/vs/0']
+    reg = for_device_by_model(
+        info['x.com.samsung.da.modelNum'], info['x.com.samsung.da.description'])
+    return reg, resources
+
+
+def _state():
+    reg, resources = _air_dresser()
+    bound = discover(resources, reg.capabilities, reg.pattern_capabilities)
+    return flatten(bound, resources)
+
+
+def test_resolves_to_air_dresser_registry():
+    reg, _ = _air_dresser()
+    assert reg is not None and reg.name == 'air_dresser'
+
+
+def test_no_unbound_hrefs():
+    reg, resources = _air_dresser()
+    unbound = []
+    discover(resources, reg.capabilities, reg.pattern_capabilities, log=unbound.append)
+    assert unbound == []
+
+
+def test_buzzer_sound_present_and_writable():
+    """Issue #208's actual coverage gap: /buzzersound/vs/0 was unbound on
+    this board before laundry.BUZZER_SOUND was added to the registry."""
+    state = _state()
+    assert state['buzzer_sound'] == 'On'
+    assert 'finish_sound' not in state  # supportedFinishSound absent -- self-gated off
+
+    desc = next(
+        e for e in air_dresser.REGISTRY.capabilities['/buzzersound/vs/0'][0].entities
+        if e.key == 'buzzer_sound'
+    )
+    path, body = desc.write_fn('Off', {})
+    assert path == ['buzzersound', 'vs', '0']
+    assert body == {'setBuzzerSound': 'Off'}
+
+
+def test_course_translation_key_falls_back_to_cycle_for_unidentified_table():
+    """Same as issue #162's board: Table_00's course codes aren't
+    identified yet, so the select renders raw codes rather than names."""
+    _, resources = _air_dresser()
+    desc = air_dresser.REGISTRY.capabilities['/course/vs/0'][0].entities[0]
+    assert desc.translation_key(resources) == 'cycle'
+
+
+def test_sanitize_present_and_toggles():
+    state = _state()
+    assert state['sanitize'] is False
+
+    desc = next(
+        e for e in air_dresser.REGISTRY.capabilities['/airdresseroption/sanitize/vs/0'][0].entities
+        if e.key == 'sanitize'
+    )
+    path, body = desc.write_fn('On', {})
+    assert path == ['airdresseroption', 'sanitize', 'vs', '0']
+    assert body == {'x.com.samsung.da.sanitize': 'On'}

tests/test_air_monitor_capabilities.py

@@ -0,0 +1,115 @@
+"""Tests for the Samsung Air Monitor Plus family (ASM-KR-TP1-22-ACMB1M,
+issue #210) -- a standalone, battery-powered air-quality sensor puck. No
+controllable appliance state at all beyond the do-not-disturb window.
+"""
+from datetime import time as dt_time
+
+from custom_components.localthings.registry.adapter import flatten
+from custom_components.localthings.registry.by_type import for_device_by_oic_type, resolve
+from custom_components.localthings.registry.discovery import discover
+
+from tests.conftest import _load_device
+
+
+def _air_monitor():
+    resources = _load_device('air_monitor')
+    reg = resolve(resources)
+    return reg, resources
+
+
+def _bound():
+    reg, resources = _air_monitor()
+    return discover(resources, reg.capabilities, reg.pattern_capabilities), resources
+
+
+def _state():
+    bound, resources = _bound()
+    return flatten(bound, resources)
+
+
+def _desc(key):
+    bound, _ = _bound()
+    return next(b.desc for b in bound if b.desc.key == key)
+
+
+def test_resolves_to_air_monitor_registry():
+    reg, _ = _air_monitor()
+    assert reg is not None and reg.name == 'air_monitor'
+
+
+def test_resolves_via_oic_type_too():
+    """This board's real dump carries /oic/d's device type
+    ('x.com.st.d.airqualitysensor') as well as the 'ASM' modelNum token --
+    both paths must agree."""
+    reg = for_device_by_oic_type(('x.com.st.d.airqualitysensor',))
+    assert reg is not None and reg.name == 'air_monitor'
+
+
+def test_no_unbound_hrefs():
+    reg, resources = _air_monitor()
+    unbound = []
+    discover(resources, reg.capabilities, reg.pattern_capabilities, log=unbound.append)
+    assert unbound == []
+
+
+def test_air_quality_sensors_read_from_shared_items_decode():
+    """Same /sensors/vs/0 {type, value} shape and common.sensor_item_value
+    decode air_purifier.AIR_QUALITY already uses -- this board adds CO2,
+    which neither air_purifier nor range_hood report."""
+    state = _state()
+    assert state['dust'] == 31
+    assert state['fine_dust'] == 23
+    assert state['super_fine_dust'] == 18
+    assert state['odor'] == 1
+    assert state['clean_level'] == 2
+    assert state['co2'] == 498
+
+
+def test_second_value_slot_is_not_exposed():
+    """Dust/fine_dust/super_fine_dust each carry a second `value[1]` grade
+    code (e.g. Dust's ['31', '2']) with no supported-values field anywhere
+    in the dump to explain its scale -- per the 'still never invent... from
+    nothing' rule, only the raw reading (value[0]) is bound, not a second
+    'dust_level' or similar entity for that code."""
+    state = _state()
+    assert 'dust_level' not in state
+    assert 'dust_grade' not in state
+
+
+def test_humidity_and_battery_present():
+    state = _state()
+    assert state['humidity'] == 57
+    assert state['battery'] == 80
+    assert state['battery_charging'] is False
+
+
+def test_air_quality_standard_present():
+    state = _state()
+    assert state['air_quality_standard'] == 'AirCleanAssociation'
+
+
+def test_dnd_read_contract():
+    state = _state()
+    assert state['dnd'] is False
+    assert state['dnd_start'] == dt_time(14, 0)
+    assert state['dnd_end'] == dt_time(22, 0)
+
+
+def test_dnd_write_contracts_are_flagged_educated_guesses():
+    """Issue #210: no idle-vs-active dump pair exists for /dnd/vs/0 (DND
+    was never toggled in the one dump this board has), so these write
+    contracts are educated guesses -- symmetric with the read side's own
+    string/time-format shape, not invented from nothing, but still
+    unconfirmed on real hardware. Only the wiring is tested here; whether
+    the device actually accepts these writes needs a reporter to confirm."""
+    dnd = _desc('dnd')
+    path, body = dnd.write_fn('On', {})
+    assert path == ['dnd', 'vs', '0']
+    assert body == {'x.com.samsung.da.value': 'true'}
+    path, body = dnd.write_fn('Off', {})
+    assert body == {'x.com.samsung.da.value': 'false'}
+
+    start = _desc('dnd_start')
+    path, body = start.write_fn(dt_time(9, 30), {})
+    assert path == ['dnd', 'vs', '0']
+    assert body == {'x.com.samsung.da.startTime': '09:30:00'}

tests/test_airconditioner_capabilities.py

@@ -872,3 +872,83 @@ def test_non_legacy_board_energy_kwh_still_uses_plain_wh_scale():
     state = flatten(
         discover(resources, reg.capabilities, reg.pattern_capabilities), resources)
     assert state['energy_kwh'] == round(1686632 / 1000.0, 2)
+
+
+# ---------------------------------------------------------------------------
+# TP1X_DA-AC-RAC-01001_0000, reporter's dump. Reported "fan and WindFree are
+# missing" -- both already work: /wind/strength/vs/0's 0-4 codes match
+# _DEVICE_TO_FAN exactly, and /mode/convenient/vs/0's Nano/NanoSleep codes
+# already resolve dynamically via _preset_to_ha + the existing "nano"/
+# "nanosleep" -> "WindFree"/"WindFree sleep" translation labels -- confirmed
+# below by zero unbound hrefs and the climate entity binding with its usual
+# FAN_MODE/PRESET_MODE features. The real, previously-uncaptured gap was
+# /mode/vs/0's SmartCoolClean_/ProgressSmartClean_ option tokens (the cloud
+# custom.airConditionerOdorController capability) -- see
+# _odor_controller_active's docstring.
+# ---------------------------------------------------------------------------
+
+def _ac_odor_controller():
+    return _resolve('airconditioner_tp1x_rac_odor_controller')
+
+
+def test_odor_controller_no_unbound_hrefs():
+    reg, resources = _ac_odor_controller()
+    unbound = []
+    discover(resources, reg.capabilities, reg.pattern_capabilities, log=unbound.append)
+    assert unbound == []
+
+
+def test_odor_controller_fan_and_windfree_already_bind():
+    """The actually-reported gap wasn't real: fan speed and the WindFree
+    preset both come from the composite climate entity, which is bound here
+    with its normal fan/preset feature set -- no code change needed for
+    either."""
+    reg, resources = _ac_odor_controller()
+    bound = discover(resources, reg.capabilities, reg.pattern_capabilities)
+    climate = [b for b in bound if isinstance(b.desc, ClimateDesc)]
+    assert len(climate) == 1 and climate[0].href == '/mode/vs/0'
+    assert resources['/wind/strength/vs/0']['x.com.samsung.da.supportedModes'] == [
+        '0', '1', '2', '3', '4']
+    assert resources['/mode/convenient/vs/0']['x.com.samsung.da.supportedModes'] == [
+        'Off', 'Sleep', 'Quiet', 'Speed', 'Nano', 'NanoSleep']
+
+
+def test_odor_controller_state_and_progress_present():
+    reg, resources = _ac_odor_controller()
+    state = flatten(
+        discover(resources, reg.capabilities, reg.pattern_capabilities), resources)
+    assert state['odor_controller_active'] is False   # SmartCoolClean_Off
+    assert state['odor_controller_progress'] == 0     # ProgressSmartClean_0
+
+
+def test_odor_controller_read_from_option_tokens():
+    assert airconditioner._odor_controller_active(
+        {'x.com.samsung.da.options': ['SmartCoolClean_On']}) is True
+    assert airconditioner._odor_controller_active(
+        {'x.com.samsung.da.options': ['SmartCoolClean_Off']}) is False
+    assert airconditioner._odor_controller_active(
+        {'x.com.samsung.da.options': ['Volume_100']}) is None
+    assert airconditioner._odor_controller_progress(
+        {'x.com.samsung.da.options': ['ProgressSmartClean_42']}) == 42
+    assert airconditioner._odor_controller_progress({}) is None
+
+
+def test_odor_controller_absent_when_no_smartcoolclean_token():
+    """The original issue #17 dump's /mode/vs/0 options carry no
+    SmartCoolClean_/ProgressSmartClean_ tokens -- neither entity binds."""
+    reg, resources = _ac()
+    state = flatten(
+        discover(resources, reg.capabilities, reg.pattern_capabilities), resources)
+    assert 'odor_controller_active' not in state
+    assert 'odor_controller_progress' not in state
+
+
+def test_odor_controller_is_read_only():
+    """No command capability is confirmed for SmartCoolClean -- exposed
+    read-only, same 'don't guess' precedent as CURRENT_LIMIT/ANOMALY_LOAD."""
+    active = next(e for e in airconditioner.CLIMATE.entities
+                  if e.key == 'odor_controller_active')
+    progress = next(e for e in airconditioner.CLIMATE.entities
+                    if e.key == 'odor_controller_progress')
+    assert not hasattr(active, 'write_fn') or active.write_fn is None
+    assert not hasattr(progress, 'write_fn') or progress.write_fn is None

tests/test_by_type.py

@@ -151,6 +151,7 @@ class TestForDeviceByOicType:
         ('oic.d.washer', 'washer'),
         ('x.com.st.d.stickcleaner', 'vacuum_station'),
         ('x.com.st.d.steamcloset', 'air_dresser'),
+        ('x.com.st.d.airqualitysensor', 'air_monitor'),
     ])
     def test_known_oic_types_resolve(self, oic_type, expected):
         from custom_components.localthings.registry.by_type import for_device_by_oic_type
@@ -434,6 +435,19 @@ class TestForDeviceByModel:
         assert reg is not None
         assert reg.name == 'vacuum_station'
 
+    def test_air_monitor_via_asm_token(self):
+        """Issue #210: a standalone air-quality sensor puck
+        (ASM-KR-TP1-22-ACMB1M) reports no oneUiVersion and no
+        washer/dryer/dishwasher consumer prefix; falls back to the 'ASM'
+        token in modelNum onto the air_monitor registry."""
+        from custom_components.localthings.registry.by_type import for_device_by_model
+        reg = for_device_by_model(
+            'ASM-KR-TP1-22-ACMB1M|10243041|75000000001611C40800020000080000',
+            'ASM-KR-TP1-22-ACMB1M',
+        )
+        assert reg is not None
+        assert reg.name == 'air_monitor'
+
     def test_cooktop_via_legacy_model_description(self):
         """Older cooktops identify themselves as ARTIK051_GLOBAL_COOKTOP."""
         from custom_components.localthings.registry.by_type import for_device_by_model

tests/test_common_capabilities.py

@@ -15,9 +15,13 @@ def _reg():
 
 
 def test_kids_lock_vs_value_fn():
+    """binary_sensor's 'lock' device class is inverted from a plain on/off
+    switch: On means open/unlocked (issues #181/#183 -- see
+    TestKidsLockFallback.test_vs_fallback_is_read_only for why this is a
+    binary_sensor at all)."""
     desc = common.KIDS_LOCK_VS_FALLBACK.entities[0]
-    assert desc.value_fn('Lock') is True
-    assert desc.value_fn('Ready') is False
+    assert desc.value_fn('Lock') is False
+    assert desc.value_fn('Ready') is True
 
 
 def test_common_caps_discover_on_dishwasher(dishwasher_resources):
@@ -228,19 +232,35 @@ class TestWmSetinfoFlags:
 
 
 class TestKidsLockFallback:
-    def test_generic_read_write(self):
+    def test_generic_is_read_only(self):
+        """Issues #181/#183: the kids-lock resource is read-only on real
+        hardware (writing the *correct* value still 4.05s, and no
+        SwitchDesc device_class='lock' is honored by HA -- the switch
+        platform only accepts 'outlet'/'switch'). KIDS_LOCK_GENERIC and
+        KIDS_LOCK_VS_FALLBACK now share the same shape (BinarySensorDesc,
+        device_class='lock', same key) so both surfaces render with the
+        same polarity: 'On' means open/unlocked."""
         assert common.KIDS_LOCK_GENERIC.href == '/kidslock/0'
         desc = common.KIDS_LOCK_GENERIC.entities[0]
-        assert desc.value_fn(True) is True
-        path, body = desc.write_fn('On', {})
-        assert path == ['kidslock', '0']
-        assert body == {'value': True}
+        assert isinstance(desc, BinarySensorDesc)
+        assert desc.value_fn(False) is True   # value=False -> On=Unlocked
+        assert desc.value_fn(True) is False   # value=True -> Off=Locked
 
     def test_vs_fallback_gated(self):
         assert common.KIDS_LOCK_VS_FALLBACK.match_fn({}, {'/kidslock/vs/0': {}}) is True
         assert common.KIDS_LOCK_VS_FALLBACK.match_fn(
             {}, {'/kidslock/0': {}, '/kidslock/vs/0': {}}) is False
 
+    def test_vs_fallback_is_read_only(self):
+        """Issues #181/#183: writing this resource 4.05s on real hardware
+        even with the *correct* value ('Run'), and no dump in the fixture
+        corpus has ever reported the value this used to write ('Enable')
+        back -- every one reports 'Ready' or 'Run'. Never a confirmed write
+        contract, so it's a binary_sensor (no write_fn field at all), not
+        a switch."""
+        desc = common.KIDS_LOCK_VS_FALLBACK.entities[0]
+        assert isinstance(desc, BinarySensorDesc)
+
 
 class TestRemoteControlFallback:
     def test_generic_read(self):

tests/test_golden_regression.py

@@ -810,6 +810,27 @@ def test_registry_reproduces_golden_state_keys_for_airconditioner_tp1x_rac_01001
     )
 
 
+def test_registry_reproduces_golden_state_keys_for_airconditioner_tp1x_rac_odor_controller():
+    """TP1X_DA-AC-RAC-01001_0000 -- reporter's dump: fan (0-4 wind-strength
+    scale) and WindFree (Nano/NanoSleep convenient-mode codes) already bind
+    via the composite climate entity, no code change needed there. The
+    genuine gap was /mode/vs/0's SmartCoolClean_/ProgressSmartClean_ option
+    tokens (the cloud custom.airConditionerOdorController capability),
+    previously unbound to any entity -- now odor_controller_active/
+    odor_controller_progress."""
+    from tests.conftest import _load_device
+    resources = _load_device('airconditioner_tp1x_rac_odor_controller')
+    golden = json.loads(
+        (GOLDEN / 'airconditioner_tp1x_rac_odor_controller.json').read_text()
+    )
+    state_keys = _new_state_keys('airconditioner_tp1x_rac_odor_controller', resources)
+    assert set(state_keys) == set(golden['state_keys']), (
+        f"state_keys mismatch:\n"
+        f"  extra:   {sorted(set(state_keys) - set(golden['state_keys']))}\n"
+        f"  missing: {sorted(set(golden['state_keys']) - set(state_keys))}"
+    )
+
+
 def test_registry_reproduces_golden_state_keys_for_air_dresser():
     """DA_DF_A51_20_COMMON AirDresser (model DF8600T, issue #162) -- reports
     no oneUiVersion; resolved via the '_DF_' modelNum token fallback. Has no
@@ -848,6 +869,50 @@ def test_registry_reproduces_golden_state_keys_for_air_dresser_tp2_20():
     )
 
 
+def test_registry_reproduces_golden_state_keys_for_air_dresser_tp1_21():
+    """DA_DF_TP1_21_COMMON AirDresser (model DF3000B, issue #208) -- another
+    board generation routed via the '_DF_' modelNum token fallback into the
+    same air_dresser registry as #162's and #157's boards (its dump also
+    happens to be the first AirDresser one to carry /oic/d's device type,
+    'x.com.st.d.steamcloset' -- see test_by_type.py's
+    TestForDeviceByOicType for that mapping's own coverage). The first
+    AirDresser dump to report /buzzersound/vs/0 (laundry.BUZZER_SOUND,
+    added for this issue -- #162's and #157's boards don't report it at
+    all). Binds cleanly with zero unbound hrefs; course codes for this
+    board's table still aren't identified (same as #162's), so 'cycle'
+    remains the raw code rather than a table-specific translation."""
+    from tests.conftest import _load_device
+    resources = _load_device('air_dresser_tp1_21')
+    golden = json.loads((GOLDEN / 'air_dresser_tp1_21.json').read_text())
+    state_keys = _new_state_keys('air_dresser_tp1_21', resources)
+    assert set(state_keys) == set(golden['state_keys']), (
+        f"state_keys mismatch:\n"
+        f"  extra:   {sorted(set(state_keys) - set(golden['state_keys']))}\n"
+        f"  missing: {sorted(set(golden['state_keys']) - set(state_keys))}"
+    )
+
+
+def test_registry_reproduces_golden_state_keys_for_air_monitor():
+    """Samsung Air Monitor Plus (ASM-KR-TP1-22-ACMB1M, issue #210) -- a
+    standalone battery-powered air-quality sensor puck, the first device
+    this integration has no controllable-appliance concept for at all (no
+    /power/*, only /energy/battery/vs/0). Routes via both /oic/d
+    ('x.com.st.d.airqualitysensor') and the 'ASM' modelNum board token.
+    Reuses air_purifier.AIR_QUALITY's /sensors/vs/0 decode
+    (common.sensor_item_value) for dust/fine_dust/super_fine_dust/odor/
+    clean_level, adding a CO2 reading those families don't report. Binds
+    cleanly with zero unbound hrefs."""
+    from tests.conftest import _load_device
+    resources = _load_device('air_monitor')
+    golden = json.loads((GOLDEN / 'air_monitor.json').read_text())
+    state_keys = _new_state_keys('air_monitor', resources)
+    assert set(state_keys) == set(golden['state_keys']), (
+        f"state_keys mismatch:\n"
+        f"  extra:   {sorted(set(state_keys) - set(golden['state_keys']))}\n"
+        f"  missing: {sorted(set(golden['state_keys']) - set(state_keys))}"
+    )
+
+
 def test_registry_reproduces_golden_state_keys_for_air_purifier_vtww():
     """A-VTWW-TP2-21-COMMON BESPOKE Cube Air (issue #151) -- reports no
     oneUiVersion; resolved via the '-VTWW-' modelNum token fallback into

tests/test_operational_capability.py

@@ -62,6 +62,34 @@ class TestCompletionMinutes:
         assert desc.rep_fn(rep) is None
 
 
+class TestFinishTime:
+    """issue: remainingTime only has minute resolution, but datetime.now()
+    always carries fresh seconds/microseconds -- an unrounded finish_time
+    changed on nearly every poll even when remainingTime hadn't, flooding
+    the recorder history/logbook with values that looked identical once
+    the UI rounded them down to the minute for display."""
+
+    def test_seconds_and_microseconds_are_zeroed(self):
+        desc = next(e for e in OPERATIONAL_STATE.entities if e.key == 'finish_time')
+        rep = {
+            'x.com.samsung.da.state': 'Run',
+            'x.com.samsung.da.remainingTime': '00:29:00',
+        }
+        result = desc.rep_fn(rep)
+        assert result.second == 0
+        assert result.microsecond == 0
+
+    def test_stable_across_polls_within_same_minute(self):
+        desc = next(e for e in OPERATIONAL_STATE.entities if e.key == 'finish_time')
+        rep = {
+            'x.com.samsung.da.state': 'Run',
+            'x.com.samsung.da.remainingTime': '00:29:00',
+        }
+        first = desc.rep_fn(rep)
+        second = desc.rep_fn(rep)
+        assert first == second
+
+
 class TestDelayFieldFallback:
     def test_reads_delay_end_time_when_delay_start_time_absent(self):
         from custom_components.localthings.registry.capabilities.operational import OPERATIONAL_STATE

tests/test_range_hood_capabilities.py

@@ -99,6 +99,16 @@ def test_fan_write_contract():
     )
     assert desc.write_fn(('speed', '99'), rep) is None
 
+    rep_fallback = {
+        'x.com.samsung.da.hood.settableMinFanSpeed': '0',
+        'x.com.samsung.da.hood.settableMaxFanSpeed': '3',
+    }
+    assert desc.write_fn(('speed', '2'), rep_fallback) == (
+        ['hood', 'fanspeed', 'vs', '0'],
+        {'x.com.samsung.da.hood.fanSpeed': '2'},
+    )
+    assert desc.write_fn(('speed', '4'), rep_fallback) is None
+
 
 def test_lamp_write_contract():
     lamp, brightness = range_hood.HOOD_LAMP.entities

tests/test_range_ne6516a_capabilities.py

@@ -56,7 +56,10 @@ def test_energy_saving_and_cooktop_alert_present():
 def test_child_lock_already_reads_correctly():
     """issue #183 also reported child lock as unreadable -- but this dump's
     /kidslock/vs/0 ('Run') and /doors/vs/0's door lock field ('Lock') already
-    agree the door is locked, and the existing common.KIDS_LOCK_VS_FALLBACK
-    already reads that correctly with no code change needed."""
+    agree the door is locked, and common.KIDS_LOCK_VS_FALLBACK already reads
+    that correctly with no further code change needed. Now a read-only
+    binary_sensor (issues #181/#183 -- the write side was never a confirmed
+    contract), whose 'lock' device class is inverted from a switch's plain
+    on/off: False means locked/closed, matching 'Run' here."""
     state = _state()
-    assert state['child_lock'] is True
+    assert state['child_lock'] is False

tests/test_sensor_hysteresis.py

@@ -0,0 +1,100 @@
+"""Unit tests for LocalThingsSensor's hysteresis gate (finish_time churn)."""
+from __future__ import annotations
+
+from datetime import datetime, timedelta, timezone
+
+from custom_components.localthings.const import CONF_FINISH_TIME_HYSTERESIS_MINUTES
+from custom_components.localthings.registry.capabilities.operational import OPERATIONAL_STATE
+from custom_components.localthings.registry.discovery import BoundEntity
+from custom_components.localthings.sensor import LocalThingsSensor
+
+_FINISH_TIME_DESC = next(e for e in OPERATIONAL_STATE.entities if e.key == 'finish_time')
+
+
+class _FakeConfigEntry:
+    def __init__(self, options):
+        self.options = options
+
+
+class _FakeCoordinator:
+    """Just enough surface for LocalThingsEntity/LocalThingsSensor."""
+
+    def __init__(self, threshold_minutes):
+        self.device_serial = 'TEST-SERIAL'
+        self.config_entry = _FakeConfigEntry({
+            CONF_FINISH_TIME_HYSTERESIS_MINUTES: threshold_minutes,
+        })
+        self.data: dict = {}
+
+
+def _sensor(threshold_minutes=3):
+    coordinator = _FakeCoordinator(threshold_minutes)
+    bound = BoundEntity(
+        href=OPERATIONAL_STATE.href, capability=OPERATIONAL_STATE, desc=_FINISH_TIME_DESC,
+    )
+    sensor = LocalThingsSensor(coordinator, bound)
+    return sensor, coordinator
+
+
+def test_small_change_is_suppressed():
+    sensor, coordinator = _sensor(threshold_minutes=3)
+    base = datetime(2026, 7, 31, 17, 0, tzinfo=timezone.utc)
+
+    coordinator.data = {'finish_time': base}
+    assert sensor.native_value == base
+
+    coordinator.data = {'finish_time': base + timedelta(minutes=1)}
+    assert sensor.native_value == base, "a 1-minute wobble should be held back"
+
+
+def test_change_past_threshold_is_reported():
+    sensor, coordinator = _sensor(threshold_minutes=3)
+    base = datetime(2026, 7, 31, 17, 0, tzinfo=timezone.utc)
+
+    coordinator.data = {'finish_time': base}
+    assert sensor.native_value == base
+
+    new = base + timedelta(minutes=5)
+    coordinator.data = {'finish_time': new}
+    assert sensor.native_value == new
+
+
+def test_zero_threshold_disables_hysteresis():
+    sensor, coordinator = _sensor(threshold_minutes=0)
+    base = datetime(2026, 7, 31, 17, 0, tzinfo=timezone.utc)
+
+    coordinator.data = {'finish_time': base}
+    assert sensor.native_value == base
+
+    new = base + timedelta(seconds=1)
+    coordinator.data = {'finish_time': new}
+    assert sensor.native_value == new
+
+
+def test_cycle_end_passes_through_immediately():
+    """A cycle ending (finish_time -> None) must never be held back."""
+    sensor, coordinator = _sensor(threshold_minutes=3)
+    base = datetime(2026, 7, 31, 17, 0, tzinfo=timezone.utc)
+
+    coordinator.data = {'finish_time': base}
+    assert sensor.native_value == base
+
+    coordinator.data = {'finish_time': None}
+    assert sensor.native_value is None
+
+
+def test_non_hysteresis_sensor_is_unaffected():
+    """A SensorDesc without hysteresis=True reads straight through, unchanged."""
+    machine_state_desc = next(
+        e for e in OPERATIONAL_STATE.entities if e.key == 'machine_state'
+    )
+    coordinator = _FakeCoordinator(threshold_minutes=3)
+    bound = BoundEntity(
+        href=OPERATIONAL_STATE.href, capability=OPERATIONAL_STATE, desc=machine_state_desc,
+    )
+    sensor = LocalThingsSensor(coordinator, bound)
+
+    coordinator.data = {'machine_state': 'active'}
+    assert sensor.native_value == 'active'
+    coordinator.data = {'machine_state': 'idle'}
+    assert sensor.native_value == 'idle'

tests/test_water_purifier_capabilities.py

@@ -281,9 +281,17 @@ def test_hotwater_lock_fallback_gating_across_status_lock_states():
     assert fallback.exists_fn({}, {}) is False
 
 
-def test_favorite_hotwater_temperature_options_come_from_live_supported_list():
+def test_favorite_hotwater_temperature_options_come_from_live_show_list():
+    """`supportedList` is only the four fixed presets -- `showList` is a
+    superset that also carries the one custom value (if any) the
+    SmartThings app's "temperatures to display" editor let the user add,
+    and always includes whatever the current default actually is. Reading
+    `supportedList` meant a unit whose default *was* that custom value
+    rendered as 'unknown' in HA (issue #196) -- see the ailite fixture's
+    version of this test below for the case that actually exercises it
+    (this fixture's showList == supportedList, no custom value set)."""
     desc = _desc_coffee('favorite_hotwater_temperature')
-    assert desc.options_field == 'x.com.samsung.da.favorite.supportedList'
+    assert desc.options_field == 'x.com.samsung.da.favorite.showList'
 
 
 def test_coffee_recipe_hrefs_are_ignored_not_guessed():
@@ -361,6 +369,28 @@ def test_ailite_hot_water_temperature_gated_off_without_supported_list():
     assert 'hot_water_temperature' not in state
 
 
+def test_ailite_favorite_hotwater_temperature_options_include_the_custom_value():
+    """Issue #196's concrete failure case: the user added a custom 50C value
+    via the SmartThings app's "temperatures to display" editor, so the
+    board's defaultTemperature is now '50'. showList contains '50'
+    ([40, 50, 75, 85, 90]) but supportedList does NOT (still the fixed
+    [40, 75, 85, 90]). Reading options_field='x.com.samsung.da.favorite.supportedList'
+    -- the old behavior -- would register a select whose options list
+    doesn't contain the current default, so HA would render the entity as
+    'unknown'. The descriptor must read from showList so '50' is in
+    options."""
+    desc = _desc_ailite('favorite_hotwater_temperature')
+    assert desc.options_field == 'x.com.samsung.da.favorite.showList'
+    _, resources = _water_purifier_ailite()
+    rep = resources['/favorite/hotwater/vs/0']
+    # defaultTemperature='50' must be a member of the field the descriptor
+    # actually reads -- this is the precise assertion that would fail under
+    # the old supportedList behavior.
+    assert rep['x.com.samsung.da.favorite.defaultTemperature'] == '50'
+    assert '50' in rep[desc.options_field]
+    assert '50' not in rep['x.com.samsung.da.favorite.supportedList']
+
+
 def test_ailite_sound_mode_options_come_from_live_supported_modes():
     """This board's supportedModes (voice/fixedTone/mute) differs from both
     laundry.SOUND_MODE's hardcoded voice/tone/mute and air_purifier.SOUND_MODE's