diff --git a/packages/artnet/hms_artnet/__init__.py b/packages/artnet/hms_artnet/__init__.py
index f5a5212..8800947 100644
--- a/packages/artnet/hms_artnet/__init__.py
+++ b/packages/artnet/hms_artnet/__init__.py
@@ -1,7 +1,8 @@
 """hms_artnet – Art-Net 4 Steuerung (PLAN.md §16).
 
 ArtDMX-Empfang, ArtPoll/ArtPollReply (Discovery als Media Server, Style 0x02),
-Fixture-Engine (Master32/Layer64, §16.3–§16.6), Universe-Plan (§16.2),
+Fixture-Engine (Master32/Layer64, §16.3–§16.6), Patch-Verwaltung (§16.2),
+DMX-zu-Parameter-Verkabelung (§11, §16), Universe-Plan (§16.2),
 konfigurierbare Universen/Adressen, Sequenzprüfung, Signalverlust-Verhalten.
 Layouts gegen die offizielle Art-Net-4-Spezifikation verifiziert.
 """
@@ -33,7 +34,13 @@ from hms_artnet.packets import (
     parse_poll,
     parse_poll_reply,
 )
+from hms_artnet.patch import (
+    FixturePatch,
+    PatchEntry,
+    PatchError,
+)
 from hms_artnet.receiver import ArtNetReceiver, DmxUpdate, LossBehavior
+from hms_artnet.wiring import DmxToParameterRouter, RouterStats
 
 __all__ = [
     "OPDMX",
@@ -64,4 +71,9 @@ __all__ = [
     "UniversePlan",
     "UniverseRange",
     "UniverseCollisionError",
+    "FixturePatch",
+    "PatchEntry",
+    "PatchError",
+    "DmxToParameterRouter",
+    "RouterStats",
 ]
diff --git a/packages/artnet/hms_artnet/patch.py b/packages/artnet/hms_artnet/patch.py
new file mode 100644
index 0000000..6c9744c
--- /dev/null
+++ b/packages/artnet/hms_artnet/patch.py
@@ -0,0 +1,196 @@
+"""Patch-Verwaltung: Layer→DMX-Adressen und Export (PLAN.md §16.2).
+
+Ein Patch ordnet Show-Layern DMX-Adressen zu:
+- Master-Fixture: eine 32-Kanal-Instanz (§16.3)
+- Layer-Fixtures: bis zu 8 Instanzen à 64 Kanäle je Universe (§16.2)
+
+Validierung:
+- Adressen lassen ihr Fixture vollständig ins Universe passen
+- keine Überlappung im selben Universe (Fehler, kein stilles Verschieben)
+- Layer-IDs eindeutig; Komposition/Layer müssen UUIDs sein (§10.2)
+
+Export (§16.2): enthält Node-ID, Art-Net Short Name, IP, Net/SubNet/Universe,
+Startadresse, Layernummer und Fixture-Version.
+"""
+
+from __future__ import annotations
+
+import csv
+import io
+import uuid
+from dataclasses import dataclass
+
+MASTER_CHANNELS = 32  # §16.3
+LAYER_CHANNELS = 64  # §16.4
+DMX_CHANNELS = 512  # DMX512
+
+
+class PatchError(Exception):
+    """Ungültiger Patch (Überlappung, außerhalb des Universes, …)."""
+
+
+@dataclass(frozen=True)
+class PatchEntry:
+    """Ein Layer-Fixture im Patch (§16.2).
+
+    - layer_id/composition_id: stabile UUIDs (§10.2)
+    - universe: 15-Bit Port-Address (Net<<8 | SubUni)
+    - base_address: 1-basierte DMX-Startadresse (1..449 für 64 Kanäle)
+    - layer_number: menschenlesbare Layernummer für den Export (1-basiert)
+    """
+
+    layer_id: str
+    composition_id: str
+    universe: int
+    base_address: int
+    layer_number: int
+
+    def __post_init__(self) -> None:
+        for name, value in (("layer_id", self.layer_id), ("composition_id", self.composition_id)):
+            try:
+                uuid.UUID(value)
+            except (ValueError, AttributeError) as exc:
+                raise ValueError(f"{name} muss eine UUID sein (§10.2)") from exc
+        if not 0 <= self.universe < 0x8000:
+            raise ValueError("universe muss 0..0x7FFF sein")
+        if not 1 <= self.base_address <= DMX_CHANNELS - LAYER_CHANNELS + 1:
+            raise ValueError(
+                f"base_address {self.base_address} passt nicht für 64 Kanäle "
+                f"(erlaubt 1..{DMX_CHANNELS - LAYER_CHANNELS + 1})"
+            )
+        if self.layer_number < 1:
+            raise ValueError("layer_number muss 1-basiert sein")
+
+    @property
+    def end_address(self) -> int:
+        """Letzte belegte DMX-Adresse (inklusiv)."""
+        return self.base_address + LAYER_CHANNELS - 1
+
+
+class FixturePatch:
+    """Vollständiger DMX-Patch eines Nodes (§16.2).
+
+    - master: Adresse des Master32-Fixtures (ein Universe, 1-basiert)
+    - layers: Liste von PatchEntry (Layer-Fixtures)
+
+    validate(): prüft Überlappungen; add/remove verwalten Einträge.
+    """
+
+    def __init__(
+        self,
+        node_id: str,
+        short_name: str,
+        master_universe: int,
+        master_base_address: int = 1,
+    ) -> None:
+        self.node_id = node_id
+        self.short_name = short_name
+        self.master_universe = master_universe
+        self.master_base_address = master_base_address
+        self._layers: dict[str, PatchEntry] = {}  # layer_id → entry
+
+    # ---------- Verwaltung ----------
+
+    def add_layer(self, entry: PatchEntry) -> None:
+        """Fügt ein Layer-Fixture hinzu; Überlappung im selben Universe = Fehler."""
+        if entry.layer_id in self._layers:
+            raise PatchError(f"Layer {entry.layer_id} bereits im Patch")
+        for existing in self._layers.values():
+            if existing.universe == entry.universe and self._overlaps(existing, entry):
+                raise PatchError(
+                    f"Adressüberlappung Universe {entry.universe}: "
+                    f"L{existing.layer_number} [{existing.base_address}.."
+                    f"{existing.end_address}] vs "
+                    f"L{entry.layer_number} [{entry.base_address}..{entry.end_address}]"
+                )
+        self._layers[entry.layer_id] = entry
+
+    def remove_layer(self, layer_id: str) -> None:
+        self._layers.pop(layer_id, None)
+
+    def layers(self) -> list[PatchEntry]:
+        return list(self._layers.values())
+
+    def layer_by_id(self, layer_id: str) -> PatchEntry | None:
+        return self._layers.get(layer_id)
+
+    def validate(self) -> list[str]:
+        """Liefert Fehlerliste; leer = gültig. Master darf kein Layer überlappen."""
+        errors: list[str] = []
+        if not 1 <= self.master_base_address <= DMX_CHANNELS - MASTER_CHANNELS + 1:
+            errors.append(
+                f"Master-Adresse {self.master_base_address} passt nicht für "
+                f"32 Kanäle (erlaubt 1..{DMX_CHANNELS - MASTER_CHANNELS + 1})"
+            )
+        master_range = (
+            self.master_base_address,
+            self.master_base_address + MASTER_CHANNELS - 1,
+        )
+        for entry in self._layers.values():
+            if entry.universe == self.master_universe and self._range_overlap(
+                (entry.base_address, entry.end_address), master_range
+            ):
+                errors.append(
+                    f"Layer {entry.layer_number} überlappt Master-Fixture "
+                    f"im Universe {self.master_universe}"
+                )
+        return errors
+
+    # ---------- Export (§16.2) ----------
+
+    def export_csv(self, ip_or_host: str = "", fixture_version: str = "1.0.0") -> str:
+        """Menschenlesbare Kanalliste nach §16.2: enthält Node-ID, Short
+        Name, IP, Net/SubNet/Universe, Startadresse, Layernummer, Version."""
+        buf = io.StringIO()
+        writer = csv.writer(buf)
+        writer.writerow(
+            [
+                "node_id",
+                "artnet_short_name",
+                "ip_or_host",
+                "fixture",
+                "universe",
+                "start_address",
+                "channels",
+                "layer_number",
+                "fixture_version",
+            ]
+        )
+        writer.writerow(
+            [
+                self.node_id,
+                self.short_name,
+                ip_or_host,
+                "HMS MediaEngine Master 32ch",
+                self.master_universe,
+                self.master_base_address,
+                MASTER_CHANNELS,
+                "",
+                fixture_version,
+            ]
+        )
+        for entry in sorted(self._layers.values(), key=lambda e: (e.universe, e.base_address)):
+            writer.writerow(
+                [
+                    self.node_id,
+                    self.short_name,
+                    ip_or_host,
+                    "HMS MediaEngine Layer 64ch",
+                    entry.universe,
+                    entry.base_address,
+                    LAYER_CHANNELS,
+                    entry.layer_number,
+                    fixture_version,
+                ]
+            )
+        return buf.getvalue()
+
+    # ---------- Interna ----------
+
+    @staticmethod
+    def _overlaps(a: PatchEntry, b: PatchEntry) -> bool:
+        return not (a.end_address < b.base_address or b.end_address < a.base_address)
+
+    @staticmethod
+    def _range_overlap(a: tuple[int, int], b: tuple[int, int]) -> bool:
+        return not (a[1] < b[0] or b[1] < a[0])
diff --git a/packages/artnet/hms_artnet/wiring.py b/packages/artnet/hms_artnet/wiring.py
new file mode 100644
index 0000000..d27bdc8
--- /dev/null
+++ b/packages/artnet/hms_artnet/wiring.py
@@ -0,0 +1,228 @@
+"""DMX-zu-Parameter-Verkabelung (PLAN.md §11, §16, §29.2).
+
+Verbindet Art-Net-Receiver → FixturePatch → Master32/Layer64-Engines →
+ParameterEngine:
+
+- jedes DMX-Update wird über den Patch dekodiert
+- dekodierte Werte fließen über stabile Parameterpfade in die Engine
+  (§11: alle Quellen über die Parameter-Engine, nie direkt in den Renderer)
+- Master-Blackout läuft mit SAFETY-Priorität (§11.2: überstimmt alles)
+- Load/Commit-Events steuern PreloadSlot für atomaren Clipwechsel (§16.5,
+  §12.2): Preload bei pending selection, Commit wechselt atomar
+- Signalverlust: konfigurierbare Policy je Patch (§16.1, §11.3)
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from hms_parameter.engine import ControlSource, ParameterEngine
+
+from hms_artnet.fixtures import (
+    Layer64Engine,
+    Master32Engine,
+    TransportCommand,
+)
+from hms_artnet.patch import MASTER_CHANNELS, FixturePatch
+from hms_artnet.receiver import DmxUpdate, LossBehavior
+
+
+@dataclass
+class RouterStats:
+    """Telemetrie je Router (§28.2: Paketrate, Events)."""
+
+    updates_processed: int = 0
+    master_updates: int = 0
+    layer_updates: int = 0
+    load_commits: int = 0
+    blackouts: int = 0
+
+
+class DmxToParameterRouter:
+    """Routet DMX-Daten über den Patch in die Parameter-Engine.
+
+    Aufbau (§6.1B, §11):
+    - ein Master32Engine für das Master-Fixture
+    - je gepatchtem Layer ein Layer64Engine (Flankenzustand je Instanz)
+    - PreloadSlot je Layer für atomaren Clipwechsel (§12.2, §16.5)
+
+    Blackout (§16.3): Master-Kanal 3 mit SAFETY-Priorität; beim Aufheben
+    wird der Override releast (nicht auf 0 gesetzt) – der darunterliegende
+    Zustand bleibt erhalten (§11.3 Release-Semantik).
+    """
+
+    def __init__(
+        self,
+        patch: FixturePatch,
+        engine: ParameterEngine,
+        loss_behavior: LossBehavior = LossBehavior.HOLD,
+    ) -> None:
+        self._patch = patch
+        self._engine = engine
+        self._loss_behavior = loss_behavior
+        self._master_engine = Master32Engine()
+        self._layer_engines: dict[str, Layer64Engine] = {}
+        self._master_blackout_active = False
+        self.stats = RouterStats()
+        # Preload-Slots je Layer (später vom Renderer bedient, §12.2)
+        self._pending_loads: dict[str, dict] = {}  # layer_id → Auswahl
+
+    # ---------- DMX-Verarbeitung ----------
+
+    def handle_update(self, update: DmxUpdate) -> None:
+        """Verarbeitet ein DMX-Update über den Patch.
+
+        - Master-Universe: 32 Kanäle ab Master-Basisadresse dekodieren
+        - Layer-Fixtures: 64 Kanäle je gepatchtem Layer im Universe
+        - Signalverlust (leere Daten): Policy je Verhalten (§16.1)
+        """
+        self.stats.updates_processed += 1
+        if update.sequence == -1 and not update.data:
+            self._handle_signal_loss(update.universe)
+            return
+        self._process_master(update)
+        self._process_layers(update)
+
+    # ---------- Master (§16.3) ----------
+
+    def _process_master(self, update: DmxUpdate) -> None:
+        if update.universe != self._patch.master_universe:
+            return
+        start = self._patch.master_base_address - 1
+        segment = bytes(update.data[start : start + MASTER_CHANNELS])
+        if len(segment) < MASTER_CHANNELS:
+            return  # Universe noch nicht vollständig; kein Fehler
+        control = self._master_engine.decode(segment)
+        self.stats.master_updates += 1
+
+        # Blackout: SAFETY-Priorität, Release beim Aufheben (§11.2, §11.3)
+        if control.blackout and not self._master_blackout_active:
+            self._engine.set_value("master/blackout", 1.0, ControlSource.SAFETY)
+            self._master_blackout_active = True
+            self.stats.blackouts += 1
+        elif not control.blackout and self._master_blackout_active:
+            self._engine.release("master/blackout", ControlSource.SAFETY)
+            self._master_blackout_active = False
+
+        src = ControlSource.CONSOLE  # Lichtpult (§11.2 Priorität 3)
+        self._engine.set_value("master/intensity", control.master_intensity, src)
+        self._engine.set_value("master/global_speed", control.global_speed, src)
+        self._engine.set_value("master/bpm", control.bpm, src)
+        self._engine.set_value("master/global_hue", control.global_hue, src)
+        self._engine.set_value(
+            "master/global_saturation", control.global_saturation, src
+        )
+        self._engine.set_value(
+            "master/test_pattern", float(control.test_pattern), src
+        )
+        if control.events:
+            self.stats.load_commits += len(control.events)
+
+    # ---------- Layer (§16.4, §16.5) ----------
+
+    def _process_layers(self, update: DmxUpdate) -> None:
+        for entry in self._patch.layers():
+            if entry.universe != update.universe:
+                continue
+            layer_engine = self._layer_engines.setdefault(
+                entry.layer_id, Layer64Engine()
+            )
+            start = entry.base_address - 1
+            segment = bytes(update.data[start : start + 64])
+            if len(segment) < 64:
+                continue  # Universe unvollständig: Layer still auslassen
+            control = layer_engine.decode(segment)
+            self.stats.layer_updates += 1
+            base = f"composition/{entry.composition_id}/layer/{entry.layer_id}"
+            src = ControlSource.CONSOLE
+
+            # Grundsteuerung (§16.4)
+            if control.enabled:
+                self._engine.set_value(f"{base}/enabled", 1.0, src)
+            else:
+                self._engine.set_value(f"{base}/enabled", 0.0, src)
+            self._engine.set_value(f"{base}/opacity", control.opacity, src)
+            self._engine.set_value(f"{base}/blend_mode", float(control.blend_mode), src)
+            self._engine.set_value(
+                f"{base}/transform/position_x", control.position_x, src
+            )
+            self._engine.set_value(
+                f"{base}/transform/position_y", control.position_y, src
+            )
+            self._engine.set_value(f"{base}/transform/scale_x", control.scale_x, src)
+            self._engine.set_value(f"{base}/transform/scale_y", control.scale_y, src)
+            self._engine.set_value(
+                f"{base}/transform/rotation_deg", control.rotation_deg, src
+            )
+            self._engine.set_value(f"{base}/color/hue", control.hue, src)
+            self._engine.set_value(
+                f"{base}/color/saturation", control.saturation, src
+            )
+            self._engine.set_value(
+                f"{base}/color/brightness", control.brightness, src
+            )
+            self._engine.set_value(f"{base}/color/contrast", control.contrast, src)
+
+            # Medien-Transport (§16.4 Kanäle 10-20, Media-Modus)
+            self._engine.set_value(
+                f"{base}/source/speed", control.speed, src
+            )
+            self._engine.set_value(
+                f"{base}/source/position", control.position, src
+            )
+            self._engine.set_value(
+                f"{base}/source/in_point", control.in_point, src
+            )
+            self._engine.set_value(
+                f"{base}/source/out_point", control.out_point, src
+            )
+            if control.transport is TransportCommand.RETRIGGER:
+                self._engine.set_value(f"{base}/source/retrigger", 1.0, src)
+
+            # FX-Steuerung (§16.4 Kanäle 41-62)
+            self._engine.set_value(
+                f"{base}/fx1/enabled", 1.0 if control.fx1_enabled else 0.0, src
+            )
+            self._engine.set_value(f"{base}/fx1/mix", control.fx1_mix, src)
+            self._engine.set_value(
+                f"{base}/fx2/enabled", 1.0 if control.fx2_enabled else 0.0, src
+            )
+            self._engine.set_value(f"{base}/fx2/mix", control.fx2_mix, src)
+
+            # Load/Commit-Events: atomare Auswahl (§16.5, §12.2)
+            for event in control.events:
+                if event.kind == "load_commit":
+                    self.stats.load_commits += 1
+                    self._pending_loads[entry.layer_id] = {
+                        "bank": event.pending_bank,
+                        "folder": event.pending_folder,
+                        "index": event.pending_index,
+                        "universe": update.universe,
+                    }
+                elif event.kind == "retrigger":
+                    self._engine.set_value(f"{base}/source/retrigger", 1.0, src)
+
+    # ---------- Ausstehende Loads (§12.2: Renderer bedient Preload) ----------
+
+    def pending_load_for(self, layer_id: str) -> dict | None:
+        """Liefert die ausstehende Load-Auswahl eines Layers (für den
+        Renderer-Preload) und entfernt sie (Verbrauch durch Aufrufer)."""
+        return self._pending_loads.pop(layer_id, None)
+
+    # ---------- Signalverlust (§16.1, §11.3) ----------
+
+    def _handle_signal_loss(self, universe: int) -> None:
+        """DMX-Ausfall auf einem Universe: Policy je Konfiguration.
+
+        - HOLD: nichts tun (letzter Zustand bleibt, §11.3)
+        - FADE_TO_BLACK: Master-Override auf 0 setzen (SAFETY)
+        """
+        if self._loss_behavior is LossBehavior.HOLD:
+            return
+        if (
+            self._loss_behavior is LossBehavior.FADE_TO_BLACK
+            and universe == self._patch.master_universe
+        ):
+            # Intensität über SAFETY auf 0; beim Wiederkommen releast die
+            # Master-Verarbeitung den Override nicht – hier explizit setzen
+            self._engine.set_value("master/intensity", 0.0, ControlSource.SAFETY)
diff --git a/tests/unit/test_patch_and_wiring.py b/tests/unit/test_patch_and_wiring.py
new file mode 100644
index 0000000..2cb5412
--- /dev/null
+++ b/tests/unit/test_patch_and_wiring.py
@@ -0,0 +1,413 @@
+"""Tests Patch-Verwaltung und DMX-zu-Parameter-Verkabelung
+(PLAN.md §16.2, §11, §29.2).
+
+Kette ohne Mocks: DMX-Bytes → Patch → Master32/Layer64-Engines →
+ParameterEngine. Prüft Adressvalidierung, Überlappungen, Export,
+Blackout-SAFETY, Load/Commit-Events, Signalverlust-Policies.
+"""
+
+from __future__ import annotations
+
+import csv
+import io
+import uuid
+
+import pytest
+from hms_artnet import (
+    DmxToParameterRouter,
+    DmxUpdate,
+    FixturePatch,
+    LossBehavior,
+    PatchEntry,
+    PatchError,
+)
+from hms_parameter.engine import ControlSource, ParameterEngine
+
+
+def _uuid() -> str:
+    return str(uuid.uuid4())
+
+
+# ---------- PatchEntry-Validierung (§16.2) ----------
+
+
+def test_patch_entry_requires_uuids() -> None:
+    with pytest.raises(ValueError, match="UUID"):
+        PatchEntry(
+            layer_id="keine-uuid",
+            composition_id=_uuid(),
+            universe=0,
+            base_address=1,
+            layer_number=1,
+        )
+
+
+def test_patch_entry_base_address_must_fit_64_channels() -> None:
+    """64 Kanäle müssen vollständig ins 512er-Universe passen."""
+    with pytest.raises(ValueError, match="passt nicht"):
+        PatchEntry(
+            layer_id=_uuid(),
+            composition_id=_uuid(),
+            universe=0,
+            base_address=450,  # 450+63 > 512
+            layer_number=1,
+        )
+    valid = PatchEntry(
+        layer_id=_uuid(),
+        composition_id=_uuid(),
+        universe=0,
+        base_address=449,  # exakt bis 512
+        layer_number=1,
+    )
+    assert valid.end_address == 512
+
+
+# ---------- FixturePatch: Überlappungen (§16.2) ----------
+
+
+def _patch() -> FixturePatch:
+    return FixturePatch(
+        node_id=_uuid(),
+        short_name="HMS Test Node",
+        master_universe=0,
+        master_base_address=1,
+    )
+
+
+def _layer_entry(universe: int, base: int, number: int) -> PatchEntry:
+    return PatchEntry(
+        layer_id=_uuid(),
+        composition_id=_uuid(),
+        universe=universe,
+        base_address=base,
+        layer_number=number,
+    )
+
+
+def test_patch_accepts_eight_layers_one_universe() -> None:
+    """§16.2: 8 Layer-Fixtures à 64 Kanäle = exakt 1 Universe."""
+    patch = FixturePatch(
+        node_id=_uuid(),
+        short_name="N",
+        master_universe=1,  # Master separat
+        master_base_address=1,
+    )
+    for i in range(8):
+        patch.add_layer(_layer_entry(universe=0, base=1 + i * 64, number=i + 1))
+    assert len(patch.layers()) == 8
+    assert patch.validate() == []
+
+
+def test_patch_rejects_overlapping_layers() -> None:
+    patch = _patch()
+    patch.add_layer(_layer_entry(universe=0, base=33, number=1))
+    with pytest.raises(PatchError, match="berlappung"):
+        patch.add_layer(_layer_entry(universe=0, base=64, number=2))  # 64..127 vs 33..96
+
+
+def test_patch_allows_same_address_in_different_universes() -> None:
+    """Gleiche Adressen in verschiedenen Universen sind erlaubt (§16.2)."""
+    patch = _patch()
+    patch.add_layer(_layer_entry(universe=0, base=1, number=1))
+    patch.add_layer(_layer_entry(universe=1, base=1, number=2))
+    assert len(patch.layers()) == 2
+
+
+def test_patch_rejects_duplicate_layer_id() -> None:
+    patch = _patch()
+    entry = _layer_entry(universe=0, base=1, number=1)
+    patch.add_layer(entry)
+    with pytest.raises(PatchError, match="bereits"):
+        patch.add_layer(entry)
+
+
+def test_patch_validate_detects_master_overlap() -> None:
+    """validate() meldet Master-Überlappung; Layer-Layer-Konflikt fängt
+    add_layer selbst (PatchError) – hier wird nur Master-Overlap geprüft."""
+    patch = FixturePatch(
+        node_id=_uuid(),
+        short_name="N",
+        master_universe=0,
+        master_base_address=1,
+    )
+    # Master: 1..32; Layer 1: 33..96 (kein Konflikt untereinander)
+    patch.add_layer(_layer_entry(universe=0, base=33, number=1))
+    assert patch.validate() == []
+    # Master auf 65..96 verschieben: überlappt Layer 1 (33..96)
+    patch.master_base_address = 65
+    errors = patch.validate()
+    assert any("Master" in e for e in errors)
+    # Master-Adresse zurück auf gültig: keine Fehler mehr
+    patch.master_base_address = 1
+    assert patch.validate() == []
+
+
+def test_patch_validate_detects_invalid_master_address() -> None:
+    patch = FixturePatch(
+        node_id=_uuid(),
+        short_name="N",
+        master_universe=0,
+        master_base_address=490,  # 490+31 > 512
+    )
+    errors = patch.validate()
+    assert any("Master-Adresse" in e for e in errors)
+
+
+# ---------- Patch-Export (§16.2) ----------
+
+
+def test_patch_export_csv_contains_required_fields() -> None:
+    """§16.2: Export enthält Node-ID, Short Name, IP, Universe,
+    Startadresse, Layernummer, Fixture-Version."""
+    patch = FixturePatch(
+        node_id="11111111-2222-3333-4444-555555555555",
+        short_name="HMS Node A",
+        master_universe=0,
+        master_base_address=1,
+    )
+    patch.add_layer(_layer_entry(universe=0, base=33, number=1))
+    patch.add_layer(_layer_entry(universe=0, base=97, number=2))
+
+    csv_text = patch.export_csv(ip_or_host="10.0.0.9", fixture_version="1.0.0")
+    rows = list(csv.reader(io.StringIO(csv_text)))
+
+    header = rows[0]
+    assert "node_id" in header
+    assert "universe" in header
+    assert "start_address" in header
+    assert "layer_number" in header
+    assert "fixture_version" in header
+
+    master_row = rows[1]
+    assert master_row[0] == "11111111-2222-3333-4444-555555555555"
+    assert master_row[1] == "HMS Node A"
+    assert master_row[2] == "10.0.0.9"
+    assert "Master 32ch" in master_row[3]
+    assert master_row[8] == "1.0.0"
+
+    layer_rows = rows[2:]
+    assert len(layer_rows) == 2
+    assert "Layer 64ch" in layer_rows[0][3]
+    assert layer_rows[0][7] == "1"
+    assert layer_rows[1][7] == "2"
+
+
+def test_patch_export_sorted_by_universe_and_address() -> None:
+    patch = _patch()
+    patch.add_layer(_layer_entry(universe=1, base=1, number=2))
+    patch.add_layer(_layer_entry(universe=0, base=65, number=1))
+    csv_text = patch.export_csv()
+    rows = list(csv.reader(io.StringIO(csv_text)))
+    # Master zuerst (Universe 0), dann Layer nach Universe/Adresse sortiert
+    layer_rows = rows[2:]
+    assert int(layer_rows[0][4]) < int(layer_rows[1][4])  # Universum aufsteigend
+
+
+# ---------- DmxToParameterRouter: Kette ohne Mocks (§11, §29.2) ----------
+
+
+def _dmx_update(universe: int, data: bytes) -> DmxUpdate:
+    return DmxUpdate(
+        universe=universe,
+        data=data,
+        sender_ip="192.168.1.100",
+        received_ns=0,
+        sequence=1,
+    )
+
+
+def _layer_patch_with_two_layers() -> tuple[FixturePatch, str, str, str, str]:
+    """Patch mit Master (Uni 0) und 2 Layern (Uni 0, Adressen 33 und 97)."""
+    comp_id = _uuid()
+    layer1_id, layer2_id = _uuid(), _uuid()
+    patch = FixturePatch(
+        node_id=_uuid(),
+        short_name="HMS Router Test",
+        master_universe=0,
+        master_base_address=1,
+    )
+    patch.add_layer(
+        PatchEntry(
+            layer_id=layer1_id,
+            composition_id=comp_id,
+            universe=0,
+            base_address=33,
+            layer_number=1,
+        )
+    )
+    patch.add_layer(
+        PatchEntry(
+            layer_id=layer2_id,
+            composition_id=comp_id,
+            universe=0,
+            base_address=97,
+            layer_number=2,
+        )
+    )
+    return patch, comp_id, layer1_id, layer2_id, ""
+
+
+def _full_universe_with_master_and_layers(
+    master: dict[int, int],
+    layer1: dict[int, int],
+    layer2: dict[int, int],
+    layer1_offset: int = 32,  # 0-basiert: Basisadresse 33 - 1
+    layer2_offset: int = 96,  # 0-basiert: Basisadresse 97 - 1
+) -> bytes:
+    """512 Kanäle; dicts sind (kanal_nr_1basiert_relativ, wert);
+    Offsets sind 0-basiert (Basisadresse-1)."""
+    data = bytearray(512)
+    for k, v in master.items():
+        data[int(k) - 1] = v
+    for k, v in layer1.items():
+        data[layer1_offset + int(k) - 1] = v
+    for k, v in layer2.items():
+        data[layer2_offset + int(k) - 1] = v
+    return bytes(data)
+
+
+def test_router_full_chain_master_and_layers() -> None:
+    """Kette: DMX → Patch → Engines → ParameterEngine; Werte landen korrekt."""
+    patch, comp, l1, l2, _ = _layer_patch_with_two_layers()
+    engine = ParameterEngine()
+    router = DmxToParameterRouter(patch, engine)
+
+    data = _full_universe_with_master_and_layers(
+        master={"1": 0x40, "2": 0x00, "3": 0, "14": 60, "15": 0},  # Intensität ~0.25, BPM
+        layer1={
+            "1": 255,  # Enable
+            "2": 0xFF, "3": 0xFF,  # Opacity 1.0
+            "4": 0,  # Media
+            "10": 1,  # Play
+            "13": 0xA0, "14": 0x00,  # Speed 1x
+            "41": 255,  # FX1 an
+            "43": 128,  # FX1 Mix
+        },
+        layer2={"1": 0, "2": 0x80, "3": 0x00},  # disabled, Opacity 50%
+    )
+    router.handle_update(_dmx_update(0, data))
+
+    base1 = f"composition/{comp}/layer/{l1}"
+    base2 = f"composition/{comp}/layer/{l2}"
+    # Master-Werte
+    assert engine.effective_value("master/intensity") == pytest.approx(0x4000 / 65535)
+    assert engine.current_source("master/intensity") is ControlSource.CONSOLE
+    # Layer 1 aktiv
+    assert engine.effective_value(f"{base1}/enabled") == pytest.approx(1.0)
+    assert engine.effective_value(f"{base1}/opacity") == pytest.approx(1.0)
+    assert engine.effective_value(f"{base1}/source/speed") == pytest.approx(1.0)
+    assert engine.effective_value(f"{base1}/fx1/enabled") == pytest.approx(1.0)
+    assert engine.effective_value(f"{base1}/fx1/mix") == pytest.approx(128 / 255)
+    # Layer 2 disabled
+    assert engine.effective_value(f"{base2}/enabled") == pytest.approx(0.0)
+    assert engine.effective_value(f"{base2}/opacity") == pytest.approx(0x8000 / 65535)
+    # Telemetrie
+    assert router.stats.updates_processed == 1
+    assert router.stats.master_updates == 1
+    assert router.stats.layer_updates == 2
+
+
+def test_router_blackout_safety_priority() -> None:
+    """§11.2/§16.3: Blackout überstimmt alles mit SAFETY; Release beim Aufheben."""
+    patch, comp, l1, _, _ = _layer_patch_with_two_layers()
+    engine = ParameterEngine()
+    router = DmxToParameterRouter(patch, engine)
+
+    # Web setzt Intensität hoch (niedrigere Priorität)
+    engine.set_value("master/intensity", 0.9, ControlSource.WEB)
+
+    # Blackout aktivieren (Kanal 3 = 255)
+    data = _full_universe_with_master_and_layers(
+        master={"3": 255}, layer1={}, layer2={}
+    )
+    router.handle_update(_dmx_update(0, data))
+    assert engine.effective_value("master/blackout") == pytest.approx(1.0)
+    assert engine.current_source("master/blackout") is ControlSource.SAFETY
+    assert router.stats.blackouts == 1
+
+    # Blackout aufheben (Kanal 3 = 0)
+    data = _full_universe_with_master_and_layers(
+        master={"3": 0}, layer1={}, layer2={}
+    )
+    router.handle_update(_dmx_update(0, data))
+    # SAFETY-Override ist released; Web-Wert wirkt wieder
+    snap = engine.snapshot()
+    assert "master/blackout" not in snap
+
+
+def test_router_load_commit_produces_pending_load() -> None:
+    """§16.5: Flanke auf Kanal 9 erzeugt load_commit; pending_load für Renderer."""
+    patch, comp, l1, _, _ = _layer_patch_with_two_layers()
+    engine = ParameterEngine()
+    router = DmxToParameterRouter(patch, engine)
+
+    # Frame 1: Auswahl setzen, kein Commit
+    data = _full_universe_with_master_and_layers(
+        master={}, layer1={"5": 2, "6": 3, "9": 0}, layer2={}
+    )
+    router.handle_update(_dmx_update(0, data))
+    assert router.pending_load_for(l1) is None  # kein Commit
+
+    # Frame 2: Commit-Flanke
+    data = _full_universe_with_master_and_layers(
+        master={}, layer1={"5": 2, "6": 3, "9": 255}, layer2={}
+    )
+    router.handle_update(_dmx_update(0, data))
+    pending = router.pending_load_for(l1)
+    assert pending is not None
+    assert pending["bank"] == 2
+    assert pending["folder"] == 3
+    assert pending["universe"] == 0
+    assert router.stats.load_commits == 1
+    # Verbrauch entfernt den Eintrag
+    assert router.pending_load_for(l1) is None
+
+
+def test_router_signal_loss_hold_keeps_state() -> None:
+    """§11.3 HOLD: Signalverlust ändert nichts."""
+    patch, _, _, _, _ = _layer_patch_with_two_layers()
+    engine = ParameterEngine()
+    router = DmxToParameterRouter(patch, engine, LossBehavior.HOLD)
+    engine.set_value("master/intensity", 0.8, ControlSource.CONSOLE)
+
+    loss = DmxUpdate(
+        universe=0, data=b"", sender_ip="x", received_ns=1, sequence=-1
+    )
+    router.handle_update(loss)
+    assert engine.effective_value("master/intensity") == pytest.approx(0.8)
+
+
+def test_router_signal_loss_fade_to_black_safety() -> None:
+    """§11.3 fade_to_black: Master-Universe-Ausfall setzt SAFETY-Override."""
+    patch, _, _, _, _ = _layer_patch_with_two_layers()
+    engine = ParameterEngine()
+    router = DmxToParameterRouter(patch, engine, LossBehavior.FADE_TO_BLACK)
+    engine.set_value("master/intensity", 0.8, ControlSource.CONSOLE)
+
+    loss = DmxUpdate(
+        universe=0, data=b"", sender_ip="x", received_ns=1, sequence=-1
+    )
+    router.handle_update(loss)
+    assert engine.effective_value("master/intensity") == pytest.approx(0.0)
+    assert engine.current_source("master/intensity") is ControlSource.SAFETY
+
+
+def test_router_ignores_foreign_universe() -> None:
+    """Updates für nicht gepatchte Universen ändern nichts."""
+    patch, comp, l1, _, _ = _layer_patch_with_two_layers()
+    engine = ParameterEngine()
+    router = DmxToParameterRouter(patch, engine)
+    router.handle_update(_dmx_update(99, bytes(512)))
+    snap = engine.snapshot()
+    assert f"composition/{comp}/layer/{l1}/enabled" not in snap
+    assert router.stats.master_updates == 0
+    assert router.stats.layer_updates == 0
+
+
+def test_router_short_universe_data_skipped_silently() -> None:
+    """Unvollständige Universen werden still ausgelassen (kein Fehler)."""
+    patch, _, _, _, _ = _layer_patch_with_two_layers()
+    engine = ParameterEngine()
+    router = DmxToParameterRouter(patch, engine)
+    router.handle_update(_dmx_update(0, bytes(16)))  # nur 16 Kanäle
+    assert router.stats.master_updates == 0  # nichts dekodiert