hOn/custom_components/hon/button.py

from homeassistant.components.button import ButtonEntityDescription, ButtonEntity
from homeassistant.config_entries import ConfigEntry
from pyhon import HonConnection
from pyhon.device import HonDevice

from .const import DOMAIN
from .hon import HonCoordinator, HonEntity

BUTTONS: dict[str, tuple[ButtonEntityDescription, ...]] = {
    "OV": (
        ButtonEntityDescription(
            key="startProgram",
            name="Start Program",
            icon="mdi:power-cycle",
        ),
        ButtonEntityDescription(
            key="stopProgram",
            name="Stop Program",
            icon="mdi:power-off",
        ),
    )
}


async def async_setup_entry(hass, entry: ConfigEntry, async_add_entities) -> None:
    hon: HonConnection = hass.data[DOMAIN][entry.unique_id]
    coordinators = hass.data[DOMAIN]["coordinators"]
    appliances = []
    for device in hon.devices:
        if device.mac_address in coordinators:
            coordinator = hass.data[DOMAIN]["coordinators"][device.mac_address]
        else:
            coordinator = HonCoordinator(hass, device)
            hass.data[DOMAIN]["coordinators"][device.mac_address] = coordinator
        await coordinator.async_config_entry_first_refresh()

        if descriptions := BUTTONS.get(device.appliance_type):
            for description in descriptions:
                if not device.commands.get(description.key):
                    continue
                appliances.extend([
                    HonButtonEntity(hass, coordinator, entry, device, description)]
                )

    async_add_entities(appliances)


class HonButtonEntity(HonEntity, ButtonEntity):
    def __init__(self, hass, coordinator, entry, device: HonDevice, description) -> None:
        super().__init__(hass, entry, coordinator, device)

        self._coordinator = coordinator
        self._device = device
        self.entity_description = description
        self._attr_unique_id = f"{super().unique_id}{description.key}"

    async def async_press(self) -> None:
        await self._device.commands[self.entity_description.key].send()