diff --git a/OWNd/message/__init__.py b/OWNd/message/__init__.py
index 5d4aa9c..788c982 100644
--- a/OWNd/message/__init__.py
+++ b/OWNd/message/__init__.py
@@ -33,6 +33,8 @@
     OWNCENPlusEvent,
     OWNCenCommand,
     OWNCenPlusCommand,
+    OWNScenarioPlusCommand,
+    OWNScenarioPlusEvent,
     OWNDryContactCommand,
     OWNDryContactEvent,
 )
@@ -189,6 +191,8 @@
     "OWNCenCommand",
     "OWNDryContactCommand",
     "OWNCenPlusCommand",
+    "OWNScenarioPlusEvent",
+    "OWNScenarioPlusCommand",
     # Sound & AV (WHO 16 & 22 & 7)
     "OWNSoundEvent",
     "OWNAVCommand",
diff --git a/OWNd/message/cen.py b/OWNd/message/cen.py
index 2dfeb71..21e6afc 100644
--- a/OWNd/message/cen.py
+++ b/OWNd/message/cen.py
@@ -155,6 +155,78 @@ def human_readable_log(self) -> str:
 
 
 
+class OWNScenarioPlusEvent(OWNEvent):
+    """WHO 25 WHAT 11-15: scenario-plus / dimmer-like commands on a WHERE.
+
+    libqtdevices ScenarioPlusDevice sends 11#0 on, 12 off, 13#0#5 increase,
+    14#0#5 decrease, 15 stop (scenario_device.cpp:37-41, 163-186); mhs1 bt_luci
+    accepts all five and echoes them on the monitor port.
+    """
+
+    _NAMES = {11: "on", 12: "off", 13: "increase", 14: "decrease", 15: "stop"}
+
+    def __init__(self, data: str) -> None:
+        super().__init__(data)
+        self._action = self._NAMES.get(self._what) if self._what is not None else None
+        self.object = self._where
+        _params = "#".join(self._what_param) if self._what_param else ""
+        self._human_readable_log = (
+            f"Scenario plus {self._where}: {self._action}"
+            + (f" (parameters {_params})" if _params else "")
+            + "."
+        )
+
+    @property
+    def action(self) -> str | None:
+        return self._action
+
+
+class OWNScenarioPlusCommand(OWNCommand):
+    """Builders for the five WHO 25 frames libqtdevices ScenarioPlusDevice sends."""
+
+    _NAMES = {11: "on", 12: "off", 13: "increase", 14: "decrease", 15: "stop"}
+
+    def __init__(self, data: str) -> None:
+        super().__init__(data)
+        self._action = self._NAMES.get(self._what) if self._what is not None else None
+        self.object = self._where
+        self._human_readable_log = f"Scenario plus {self._where}: {self._action}."
+
+    @property
+    def action(self) -> str | None:
+        return self._action
+
+    @classmethod
+    def turn_on(cls, where: str | int) -> OWNScenarioPlusCommand:
+        message = cls(f"*25*11#0*{where}##")
+        message._human_readable_log = f"Scenario plus {where}: on."
+        return message
+
+    @classmethod
+    def turn_off(cls, where: str | int) -> OWNScenarioPlusCommand:
+        message = cls(f"*25*12*{where}##")
+        message._human_readable_log = f"Scenario plus {where}: off."
+        return message
+
+    @classmethod
+    def increase(cls, where: str | int) -> OWNScenarioPlusCommand:
+        message = cls(f"*25*13#0#5*{where}##")
+        message._human_readable_log = f"Scenario plus {where}: increase."
+        return message
+
+    @classmethod
+    def decrease(cls, where: str | int) -> OWNScenarioPlusCommand:
+        message = cls(f"*25*14#0#5*{where}##")
+        message._human_readable_log = f"Scenario plus {where}: decrease."
+        return message
+
+    @classmethod
+    def stop(cls, where: str | int) -> OWNScenarioPlusCommand:
+        message = cls(f"*25*15*{where}##")
+        message._human_readable_log = f"Scenario plus {where}: stop."
+        return message
+
+
 class OWNDryContactCommand(OWNCommand):
     @classmethod
     def status(cls, where: str | int) -> OWNDryContactCommand:
@@ -280,6 +352,8 @@ def _parse_who25_event(data: str) -> OWNEvent:
         what_code = None
     if what_code is not None and 21 <= what_code <= 28:
         return OWNCENPlusEvent(data)
+    if what_code is not None and 11 <= what_code <= 15:
+        return OWNScenarioPlusEvent(data)
     if what_code is not None and what_code not in (31, 32):
         return OWNEvent(data)
     return OWNDryContactEvent(data)
@@ -296,6 +370,8 @@ def _parse_who25_command(data: str) -> OWNCommand:
         what_code = None
     if what_code is not None and 21 <= what_code <= 28:
         return OWNCenPlusCommand(data)
+    if what_code is not None and 11 <= what_code <= 15:
+        return OWNScenarioPlusCommand(data)
     # Same rule as _parse_who25_event: only WHAT 31/32 are dry contacts.
     if what_code is not None and what_code not in (31, 32):
         return OWNCommand(data)
diff --git a/tests/test_issue_77_firmware_findings.py b/tests/test_issue_77_firmware_findings.py
index f799176..cd1b47e 100644
--- a/tests/test_issue_77_firmware_findings.py
+++ b/tests/test_issue_77_firmware_findings.py
@@ -25,6 +25,8 @@
 import pytest
 
 from OWNd.message import (
+    OWNScenarioPlusCommand,
+    OWNScenarioPlusEvent,
     CLIMATE_MODE_AUTO,
     CLIMATE_MODE_COOL,
     CLIMATE_MODE_HEAT,
@@ -396,15 +398,22 @@ def test_fix8_interface_is_read_for_scenarios_and_who14(frame: str) -> None:
 # ── Fix 9: other WHO 25 messages ────────────────────────────────────────────
 
 
-@pytest.mark.parametrize("frame", ["*25*11#121*10##", "*25*12*131##"])
-def test_fix9_other_who25_messages_are_not_dry_contacts(frame: str) -> None:
+@pytest.mark.parametrize(
+    ("frame", "action"),
+    [("*25*11#121*10##", "on"), ("*25*12*131##", "off"), ("*25*13#0#5*11##", "increase")],
+)
+def test_fix9_other_who25_messages_are_not_dry_contacts(frame: str, action: str) -> None:
     """Emitted: the firmware sends WHAT 11..15 on ``1xx`` addresses.
 
-    Encyclopedia: dry contacts are WHAT 31 and 32 only.
+    Encyclopedia: dry contacts are WHAT 31 and 32 only. libqtdevices
+    ScenarioPlusDevice sends 11#0 / 12 / 13#0#5 / 14#0#5 / 15
+    (scenario_device.cpp:37-41) and mhs1 bt_luci accepts and echoes all five
+    (oracle3/out/luci.tsv), so they are scenario-plus events.
     """
     event = OWNEvent.parse(frame)
 
-    assert type(event) is OWNEvent
+    assert isinstance(event, OWNScenarioPlusEvent)
+    assert event.action == action
     assert not isinstance(event, OWNDryContactEvent)
 
 
@@ -425,8 +434,8 @@ def test_fix9_captured_who25_messages_keep_their_class(frame: str, cls: type) ->
 @pytest.mark.parametrize(
     ("frame", "cls"),
     [
-        ("*25*11#121*10##", OWNCommand),
-        ("*25*12*131##", OWNCommand),
+        ("*25*11#121*10##", OWNScenarioPlusCommand),
+        ("*25*12*131##", OWNScenarioPlusCommand),
         ("*25*31#1*339##", OWNDryContactCommand),
         ("*25*32#1*33##", OWNDryContactCommand),
         ("*#25*331##", OWNDryContactCommand),
diff --git a/tests/test_who25_scenario_plus.py b/tests/test_who25_scenario_plus.py
new file mode 100644
index 0000000..c20b57a
--- /dev/null
+++ b/tests/test_who25_scenario_plus.py
@@ -0,0 +1,56 @@
+"""WHO 25 WHAT 11-15 are scenario-plus commands (libqtdevices TS10_1_0_23
+scenario_device.cpp:37-41 and :163-186). Firmware replay on bt_luci
+(MyHomeServer1, F454, F459): all five ACK with a bus frame (B1 01 93 00,
+94 00, 95 40, 96 40, 97 00) and are echoed on the monitor port."""
+
+from OWNd.message import OWNCommand, OWNEvent, OWNScenarioPlusCommand, OWNScenarioPlusEvent
+
+
+def test_builders_send_the_ts10_frames():
+    assert str(OWNScenarioPlusCommand.turn_on(11)) == "*25*11#0*11##"
+    assert str(OWNScenarioPlusCommand.turn_off(11)) == "*25*12*11##"
+    assert str(OWNScenarioPlusCommand.increase(11)) == "*25*13#0#5*11##"
+    assert str(OWNScenarioPlusCommand.decrease(11)) == "*25*14#0#5*11##"
+    assert str(OWNScenarioPlusCommand.stop(11)) == "*25*15*11##"
+
+
+def test_commands_and_events_are_routed():
+    for frame, action in [
+        ("*25*11#0*11##", "on"),
+        ("*25*12*11##", "off"),
+        ("*25*13#0#5*11##", "increase"),
+        ("*25*14#0#5*11##", "decrease"),
+        ("*25*15*11##", "stop"),
+    ]:
+        cmd = OWNCommand.parse(frame)
+        assert isinstance(cmd, OWNScenarioPlusCommand)
+        assert cmd.action == action
+        assert cmd.object == "11"
+        assert cmd.human_readable_log == f"Scenario plus 11: {action}."
+
+        event = OWNEvent.parse(frame)
+        assert isinstance(event, OWNScenarioPlusEvent)
+        assert event.action == action
+        assert event.object == "11"
+
+
+def test_classes_exported_in_all():
+    import OWNd.message as message_mod
+
+    assert "OWNScenarioPlusCommand" in message_mod.__all__
+    assert "OWNScenarioPlusEvent" in message_mod.__all__
+
+
+def test_firmware_emitted_forms_parse():
+    # bt_luci prints WHERE 1xx for these events (64 corpus lines for 12 and 15)
+    event = OWNEvent.parse("*25*12*131##")
+    assert isinstance(event, OWNScenarioPlusEvent)
+    assert event.action == "off"
+    event = OWNEvent.parse("*25*11#121*10##")
+    assert event.action == "on"
+
+
+def test_other_who25_whats_stay_bare_events_and_commands():
+    """WHATs outside 11-15, 21-28 and 31/32 keep the PR 82 rule: a bare event / command."""
+    assert type(OWNEvent.parse("*25*16*1##")) is OWNEvent
+    assert type(OWNCommand.parse("*25*16*1##")) is OWNCommand