Add Reticulum/LXMF integration for Home Assistant

Custom integration connecting Home Assistant to a Reticulum network over a
TCPClientInterface and exchanging LXMF messages, with an Assist conversation
bridge, notify entity, sensors (incl. interface telemetry), buttons, services,
bus events and device triggers.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

custom_components/reticulum/button.py

@@ -0,0 +1,65 @@
+"""Button platform for Reticulum."""
+
+from __future__ import annotations
+
+import logging
+
+from homeassistant.components.button import ButtonEntity
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from .const import DOMAIN
+from .entity import ReticulumEntity
+from .reticulum_client import ReticulumError, ReticulumManager
+
+_LOGGER = logging.getLogger(__name__)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up Reticulum buttons."""
+    manager: ReticulumManager = hass.data[DOMAIN][entry.entry_id].manager
+    async_add_entities(
+        [
+            ReticulumAnnounceButton(manager, entry.entry_id),
+            ReticulumSyncButton(manager, entry.entry_id),
+        ]
+    )
+
+
+class ReticulumAnnounceButton(ReticulumEntity, ButtonEntity):
+    """Announce our LXMF destination on demand."""
+
+    _attr_translation_key = "announce"
+    _attr_icon = "mdi:bullhorn"
+
+    def __init__(self, manager: ReticulumManager, entry_id: str) -> None:
+        super().__init__(manager, entry_id)
+        self._attr_unique_id = f"{entry_id}_announce"
+
+    async def async_press(self) -> None:
+        try:
+            await self._manager.async_announce()
+        except ReticulumError as err:
+            _LOGGER.warning("Announce failed: %s", err)
+
+
+class ReticulumSyncButton(ReticulumEntity, ButtonEntity):
+    """Pull queued messages from the configured propagation node."""
+
+    _attr_translation_key = "sync"
+    _attr_icon = "mdi:sync"
+
+    def __init__(self, manager: ReticulumManager, entry_id: str) -> None:
+        super().__init__(manager, entry_id)
+        self._attr_unique_id = f"{entry_id}_sync"
+
+    async def async_press(self) -> None:
+        try:
+            await self._manager.async_sync_propagation()
+        except ReticulumError as err:
+            _LOGGER.warning("Propagation sync failed: %s", err)