diff --git a/homeassistant/components/smarla/button.py b/homeassistant/components/smarla/button.py
new file mode 100644
index 00000000000..c4ebbf3486c
--- /dev/null
+++ b/homeassistant/components/smarla/button.py
@@ -0,0 +1,53 @@
+"""Support for the Swing2Sleep Smarla button entities."""
+
+from dataclasses import dataclass
+
+from pysmarlaapi.federwiege.services.classes import Property
+
+from homeassistant.components.button import ButtonEntity, ButtonEntityDescription
+from homeassistant.const import EntityCategory
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+
+from . import FederwiegeConfigEntry
+from .entity import SmarlaBaseEntity, SmarlaEntityDescription
+
+PARALLEL_UPDATES = 0
+
+
+@dataclass(frozen=True, kw_only=True)
+class SmarlaButtonEntityDescription(SmarlaEntityDescription, ButtonEntityDescription):
+    """Class describing Swing2Sleep Smarla button entity."""
+
+
+BUTTONS: list[SmarlaButtonEntityDescription] = [
+    SmarlaButtonEntityDescription(
+        key="send_diagnostics",
+        translation_key="send_diagnostics",
+        service="system",
+        property="send_diagnostic_data",
+        entity_category=EntityCategory.CONFIG,
+    ),
+]
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: FederwiegeConfigEntry,
+    async_add_entities: AddConfigEntryEntitiesCallback,
+) -> None:
+    """Set up the Smarla buttons from config entry."""
+    federwiege = config_entry.runtime_data
+    async_add_entities(SmarlaButton(federwiege, desc) for desc in BUTTONS)
+
+
+class SmarlaButton(SmarlaBaseEntity, ButtonEntity):
+    """Representation of a Smarla button."""
+
+    entity_description: SmarlaButtonEntityDescription
+
+    _property: Property[str]
+
+    def press(self) -> None:
+        """Press the button."""
+        self._property.set("Sent from Home Assistant")
diff --git a/homeassistant/components/smarla/const.py b/homeassistant/components/smarla/const.py
index 7f0572d0ecb..96f814a34cd 100644
--- a/homeassistant/components/smarla/const.py
+++ b/homeassistant/components/smarla/const.py
@@ -6,7 +6,13 @@ DOMAIN = "smarla"
 
 HOST = "https://devices.swing2sleep.de"
 
-PLATFORMS = [Platform.NUMBER, Platform.SENSOR, Platform.SWITCH, Platform.UPDATE]
+PLATFORMS = [
+    Platform.BUTTON,
+    Platform.NUMBER,
+    Platform.SENSOR,
+    Platform.SWITCH,
+    Platform.UPDATE,
+]
 
 DEVICE_MODEL_NAME = "Smarla"
 MANUFACTURER_NAME = "Swing2Sleep"
diff --git a/homeassistant/components/smarla/strings.json b/homeassistant/components/smarla/strings.json
index 0427bd04d11..a73aa80e166 100644
--- a/homeassistant/components/smarla/strings.json
+++ b/homeassistant/components/smarla/strings.json
@@ -30,6 +30,11 @@
     }
   },
   "entity": {
+    "button": {
+      "send_diagnostics": {
+        "name": "Send diagnostics"
+      }
+    },
     "number": {
       "intensity": {
         "name": "Intensity"
diff --git a/tests/components/smarla/conftest.py b/tests/components/smarla/conftest.py
index cd626174ce2..38fef2f0968 100644
--- a/tests/components/smarla/conftest.py
+++ b/tests/components/smarla/conftest.py
@@ -105,6 +105,7 @@ def _mock_system_service() -> MagicMock:
     mock_system_service.props = {
         "firmware_update": MagicMock(spec=Property),
         "firmware_update_status": MagicMock(spec=Property),
+        "send_diagnostic_data": MagicMock(spec=Property),
     }
 
     mock_system_service.props["firmware_update"].get.return_value = 0
diff --git a/tests/components/smarla/snapshots/test_button.ambr b/tests/components/smarla/snapshots/test_button.ambr
new file mode 100644
index 00000000000..7c0394f4f61
--- /dev/null
+++ b/tests/components/smarla/snapshots/test_button.ambr
@@ -0,0 +1,50 @@
+# serializer version: 1
+# name: test_entities[button.smarla_send_diagnostics-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'button',
+    'entity_category': <EntityCategory.CONFIG: 'config'>,
+    'entity_id': 'button.smarla_send_diagnostics',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Send diagnostics',
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': 'Send diagnostics',
+    'platform': 'smarla',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'send_diagnostics',
+    'unique_id': 'ABCD-send_diagnostics',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[button.smarla_send_diagnostics-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'friendly_name': 'Smarla Send diagnostics',
+    }),
+    'context': <ANY>,
+    'entity_id': 'button.smarla_send_diagnostics',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'unknown',
+  })
+# ---
diff --git a/tests/components/smarla/test_button.py b/tests/components/smarla/test_button.py
new file mode 100644
index 00000000000..2abe094ac8a
--- /dev/null
+++ b/tests/components/smarla/test_button.py
@@ -0,0 +1,67 @@
+"""Test button platform for Swing2Sleep Smarla integration."""
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.components.button import DOMAIN as BUTTON_DOMAIN, SERVICE_PRESS
+from homeassistant.const import ATTR_ENTITY_ID, Platform
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
+
+from . import setup_integration
+
+from tests.common import MockConfigEntry, snapshot_platform
+
+BUTTON_ENTITIES = [
+    {
+        "entity_id": "button.smarla_send_diagnostics",
+        "service": "system",
+        "property": "send_diagnostic_data",
+    },
+]
+
+
+@pytest.mark.usefixtures("mock_federwiege")
+async def test_entities(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    entity_registry: er.EntityRegistry,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test the Smarla entities."""
+    with (
+        patch("homeassistant.components.smarla.PLATFORMS", [Platform.BUTTON]),
+    ):
+        assert await setup_integration(hass, mock_config_entry)
+
+        await snapshot_platform(
+            hass, entity_registry, snapshot, mock_config_entry.entry_id
+        )
+
+
+@pytest.mark.parametrize("entity_info", BUTTON_ENTITIES)
+async def test_button_action(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_federwiege: MagicMock,
+    entity_info: dict[str, str],
+) -> None:
+    """Test Smarla Button press behavior."""
+    assert await setup_integration(hass, mock_config_entry)
+
+    mock_button_property = mock_federwiege.get_property(
+        entity_info["service"], entity_info["property"]
+    )
+
+    entity_id = entity_info["entity_id"]
+
+    # Turn on
+    await hass.services.async_call(
+        BUTTON_DOMAIN,
+        SERVICE_PRESS,
+        {ATTR_ENTITY_ID: entity_id},
+        blocking=True,
+    )
+    mock_button_property.set.assert_called_once()