Home Assistant API接口:开发者集成指南

Home Assistant API接口:开发者集成指南

【免费下载链接】core home-assistant/core: 是开源的智能家居平台,可以通过各种组件和插件实现对家庭中的智能设备的集中管理和自动化控制。适合对物联网、智能家居以及想要实现家庭自动化控制的开发者。 【免费下载链接】core 项目地址: https://gitcode.com/GitHub_Trending/co/core

1. 引言:解决智能家居集成的痛点

你是否曾面临这些挑战:智能家居设备品牌碎片化导致控制协议不统一?自行开发家庭自动化逻辑时缺乏标准化接口?第三方服务集成过程中认证与权限管理复杂?Home Assistant API(应用程序编程接口)为这些问题提供了统一解决方案。

读完本文你将获得:

  • 掌握Home Assistant核心API架构与组件交互原理
  • 学会使用事件总线(Event Bus)实现设备状态监听
  • 掌握服务注册与调用的全流程开发
  • 实现自定义集成的配置管理与生命周期控制
  • 通过15+代码示例构建实用智能家居功能

2. Home Assistant API架构概览

Home Assistant采用模块化架构设计,核心API可分为四大功能域,通过分层设计实现高内聚低耦合:

mermaid

2.1 核心组件关系

  • HomeAssistant类:系统核心容器,管理所有组件生命周期与资源分配
  • 事件总线(EventBus):实现跨组件通信的松耦合机制
  • 服务注册表(ServiceRegistry):标准化功能调用接口
  • 状态机(StateMachine):统一管理设备状态与属性

2.2 API调用流程

mermaid

3. 事件总线API详解

事件总线(Event Bus)是Home Assistant的神经系统,采用发布-订阅模式实现组件间通信。所有设备状态变化、系统事件和自定义通知都通过事件总线传递。

3.1 核心事件类型

事件类型描述数据结构应用场景
state_changed实体状态变更{entity_id, old_state, new_state}设备状态监控、自动化触发
call_service服务调用事件{domain, service, service_data}操作审计、日志记录
homeassistant_start系统启动事件{}初始化任务调度
homeassistant_stop系统停止事件{}资源清理、状态保存
core_config_update配置更新事件{config}动态配置应用

3.2 事件监听实现

3.2.1 基本事件监听
async def async_setup(hass, config):
    # 监听所有状态变更事件
    def state_change_listener(event):
        entity_id = event.data.get('entity_id')
        old_state = event.data.get('old_state')
        new_state = event.data.get('new_state')
        _LOGGER.info(f"Entity {entity_id} changed from {old_state.state} to {new_state.state}")
    
    hass.bus.async_listen('state_changed', state_change_listener)
    return True
3.2.2 特定实体监听
async def async_setup(hass, config):
    # 监听特定灯的状态变更
    def light_state_changed(event):
        new_state = event.data.get('new_state')
        if new_state.state == 'on':
            _LOGGER.info("客厅灯已开启")
            # 触发其他自动化操作
    
    # 使用通配符匹配实体ID
    hass.bus.async_listen(
        'state_changed', 
        light_state_changed,
        event_filter=lambda e: e.data.get('entity_id') == 'light.living_room'
    )
    return True
3.2.3 一次性事件监听
async def async_setup(hass, config):
    # 系统启动完成后执行初始化
    async def on_startup(event):
        _LOGGER.info("Home Assistant启动完成,执行初始化任务")
        # 执行一次性初始化操作
        await initialize_custom_components(hass)
    
    hass.bus.async_listen_once('homeassistant_started', on_startup)
    return True

3.3 事件发布实现

async def publish_custom_event(hass):
    """发布自定义事件示例"""
    event_data = {
        "device_id": "sensor.motion_123",
        "motion_detected": True,
        "timestamp": dt_util.utcnow().isoformat(),
        "confidence": 0.92
    }
    
    # 发布自定义事件
    hass.bus.async_fire(
        event_type="motion_detected",
        event_data=event_data,
        origin="LOCAL"  # 事件来源: LOCAL/REMOTE/AUTOMATION
    )

4. 服务注册与调用API

服务(Service)是Home Assistant的功能调用接口,任何可执行操作(如开灯、调整温度)都封装为服务。服务采用domain.service命名规范,如light.turn_on

4.1 服务注册流程

mermaid

4.2 服务注册代码示例

4.2.1 基础服务注册
import voluptuous as vol
from homeassistant.core import ServiceCall

# 定义服务参数验证schema
SERVICE_SCHEMA = vol.Schema({
    vol.Required('entity_id'): str,
    vol.Optional('brightness', default=100): vol.All(vol.Coerce(int), vol.Range(min=1, max=255)),
    vol.Optional('transition', default=1): vol.Coerce(int)
})

async def async_setup(hass, config):
    # 实现服务回调
    async def handle_custom_light_service(call: ServiceCall):
        """处理自定义灯光服务"""
        entity_id = call.data['entity_id']
        brightness = call.data['brightness']
        transition = call.data['transition']
        
        # 调用现有服务实现功能
        await hass.services.async_call(
            domain='light',
            service='turn_on',
            service_data={
                'entity_id': entity_id,
                'brightness': brightness,
                'transition': transition
            },
            blocking=True  # 等待服务执行完成
        )
    
    # 注册服务
    hass.services.async_register(
        domain='custom_light',
        service='fade_in',
        service_func=handle_custom_light_service,
        schema=SERVICE_SCHEMA
    )
    
    return True
4.2.2 带权限控制的服务
from homeassistant.exceptions import Unauthorized

async def async_setup(hass, config):
    async def secure_service_handler(call: ServiceCall):
        """带权限检查的服务示例"""
        # 权限检查
        if not has_permission(hass, call.context.user_id, "control_security"):
            raise Unauthorized("用户无权限执行安全操作")
            
        # 执行安全相关操作
        _LOGGER.info(f"执行安全操作: {call.data}")
    
    hass.services.async_register(
        domain='security',
        service='arm_system',
        service_func=secure_service_handler,
        schema=vol.Schema({
            vol.Required('mode'): vol.In(['home', 'away', 'night'])
        })
    )
    return True

4.3 服务调用示例

4.3.1 基础服务调用
# 在自动化或脚本中调用服务
async def trigger_security_alert(hass):
    """触发安全警报"""
    try:
        # 调用服务并等待结果
        result = await hass.services.async_call(
            domain='security',
            service='arm_system',
            service_data={'mode': 'away'},
            blocking=True,
            return_response=True
        )
        _LOGGER.info(f"安全系统布防结果: {result}")
    except ServiceNotFound:
        _LOGGER.error("安全服务未找到,请检查集成是否正确加载")
    except ServiceValidationError as e:
        _LOGGER.error(f"服务参数错误: {str(e)}")
4.3.2 批量设备控制
async def control_multiple_devices(hass):
    """同时控制多个设备"""
    # 并行调用多个服务
    tasks = [
        hass.services.async_call('light', 'turn_on', {'entity_id': 'light.living_room'}),
        hass.services.async_call('switch', 'turn_on', {'entity_id': 'switch.tv'}),
        hass.services.async_call('climate', 'set_temperature', {
            'entity_id': 'climate.thermostat',
            'temperature': 22
        })
    ]
    
    # 等待所有任务完成
    await asyncio.gather(*tasks)
    _LOGGER.info("所有设备已按计划开启")

5. 状态管理API

状态机(StateMachine)负责跟踪所有实体的当前状态,提供状态读写、变更监听等核心功能。每个实体状态包含state字符串和attributes字典。

5.1 状态数据结构

# 状态对象结构示例
{
    "entity_id": "light.kitchen",
    "state": "on",
    "attributes": {
        "brightness": 200,
        "color_temp": 3500,
        "hs_color": [240, 100],
        "rgb_color": [0, 0, 255],
        "xy_color": [0.153, 0.054],
        "friendly_name": "厨房灯",
        "supported_features": 151,
        "icon": "mdi:lightbulb"
    },
    "last_changed": "2023-11-15T08:30:45.123456+00:00",
    "last_updated": "2023-11-15T08:30:45.123456+00:00",
    "context": {
        "id": "abc123def456",
        "parent_id": null,
        "user_id": "xyz789"
    }
}

5.2 状态读写操作

5.2.1 获取实体状态
def get_device_status(hass, entity_id):
    """获取设备状态信息"""
    # 获取单个实体状态
    state = hass.states.get(entity_id)
    
    if not state:
        _LOGGER.warning(f"实体 {entity_id} 不存在")
        return None
        
    # 提取状态信息
    status = {
        "entity_id": state.entity_id,
        "state": state.state,
        "attributes": dict(state.attributes),
        "last_changed": state.last_changed.isoformat(),
        "last_updated": state.last_updated.isoformat()
    }
    
    return status

# 使用示例
kitchen_light = get_device_status(hass, "light.kitchen")
if kitchen_light and kitchen_light["state"] == "on":
    _LOGGER.info(f"厨房灯当前亮度: {kitchen_light['attributes']['brightness']}")
5.2.2 设置实体状态
async def update_custom_sensor(hass):
    """更新自定义传感器状态"""
    entity_id = "sensor.energy_usage"
    
    # 准备状态数据
    state = "125.5"  # 主要状态值,通常为字符串
    attributes = {
        "unit_of_measurement": "kWh",
        "friendly_name": "能源使用",
        "icon": "mdi:flash",
        "last_reset": dt_util.utc_from_timestamp(0).isoformat(),
        "state_class": "measurement",
        "device_class": "energy"
    }
    
    # 更新状态
    await hass.states.async_set(
        entity_id=entity_id,
        new_state=state,
        attributes=attributes,
        force_update=True  # 即使状态值相同也更新
    )
    
    _LOGGER.info(f"已更新 {entity_id} 状态为 {state} kWh")
5.2.3 状态变更监听
async def async_setup(hass, config):
    """监听温度变化并触发警报"""
    async def temperature_alert_listener(entity_id, old_state, new_state):
        """温度变化监听器"""
        if old_state is None:  # 初始状态不触发
            return
            
        try:
            current_temp = float(new_state.state)
            if current_temp > 30:
                # 温度过高,触发警报服务
                await hass.services.async_call(
                    "alert", "fire", 
                    {"entity_id": "alert.high_temperature", "message": f"温度过高: {current_temp}°C"}
                )
        except (ValueError, TypeError):
            _LOGGER.warning(f"无法解析温度值: {new_state.state}")
    
    # 监听温度传感器状态变化
    hass.states.async_listen_entity_changes(
        "sensor.temperature",  # 实体ID,支持通配符如"sensor.temp_*"
        temperature_alert_listener
    )
    
    return True

6. 配置管理API

配置管理API负责处理集成的配置流程,包括配置验证、存储、更新和迁移。Home Assistant支持YAML配置和UI配置两种方式,推荐使用配置条目(Config Entry)实现UI驱动的配置流程。

6.1 配置条目生命周期

mermaid

6.2 配置条目实现示例

6.2.1 基础配置条目
from homeassistant.config_entries import ConfigEntry, SOURCE_IMPORT
from homeassistant.core import HomeAssistant
from homeassistant.helpers import config_validation as cv

# 配置schema定义
CONFIG_SCHEMA = cv.schema_with_slug_keys(
    vol.Schema({
        vol.Required('api_key'): cv.string,
        vol.Required('device_id'): cv.string,
        vol.Optional('update_interval', default=30): cv.positive_int
    })
)

async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """设置配置条目"""
    # 存储配置数据到hass.data
    hass.data.setdefault(DOMAIN, {})[entry.entry_id] = {
        'api_key': entry.data['api_key'],
        'device_id': entry.data['device_id'],
        'update_interval': entry.options.get('update_interval', 30)
    }
    
    # 初始化协调器
    coordinator = CustomDataUpdateCoordinator(
        hass,
        config_entry=entry,
        api_key=entry.data['api_key'],
        device_id=entry.data['device_id']
    )
    
    # 存储协调器
    hass.data[DOMAIN][entry.entry_id]['coordinator'] = coordinator
    
    # 加载数据
    await coordinator.async_config_entry_first_refresh()
    
    # 注册实体
    hass.async_create_task(
        hass.config_entries.async_forward_entry_setup(entry, 'sensor')
    )
    
    return True

async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """卸载配置条目"""
    # 取消实体注册
    unload_ok = await hass.config_entries.async_forward_entry_unload(entry, 'sensor')
    
    if unload_ok:
        # 清理数据
        hass.data[DOMAIN].pop(entry.entry_id)
        if not hass.data[DOMAIN]:
            del hass.data[DOMAIN]
    
    return unload_ok
6.2.2 配置迁移与更新
async def async_migrate_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> bool:
    """处理配置版本迁移"""
    _LOGGER.info(f"迁移配置条目 {config_entry.entry_id} 从版本 {config_entry.version} 到 2")
    
    # 版本1 -> 版本2迁移逻辑
    if config_entry.version == 1:
        new_data = {**config_entry.data}
        
        # 移动location到options
        if 'location' in new_data:
            new_options = {**config_entry.options, 'location': new_data.pop('location')}
            hass.config_entries.async_update_entry(
                config_entry,
                data=new_data,
                options=new_options,
                version=2
            )
    
    return True

async def async_setup(hass: HomeAssistant, config: dict) -> bool:
    """设置集成并处理YAML配置导入"""
    if DOMAIN in config:
        for entry_config in config[DOMAIN].values():
            # 将YAML配置转换为配置条目
            hass.async_create_task(
                hass.config_entries.flow.async_init(
                    DOMAIN,
                    context={'source': SOURCE_IMPORT},
                    data=entry_config
                )
            )
    
    return True

7. 集成开发实战:天气警报系统

7.1 项目概述

我们将构建一个完整的天气警报集成,实现以下功能:

  • 从公共API获取天气数据
  • 注册为Home Assistant服务
  • 状态更新与事件发布
  • 配置管理与版本迁移

7.2 完整代码实现

7.2.1 配置与初始化
# __init__.py
import asyncio
from datetime import timedelta
import logging

from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed

from .const import DOMAIN, CONF_API_KEY, CONF_UPDATE_INTERVAL, DEFAULT_UPDATE_INTERVAL
from .weather_api import WeatherAPI, WeatherAPIError

_LOGGER = logging.getLogger(__name__)

PLATFORMS = ["sensor", "binary_sensor"]

async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """设置天气警报集成"""
    # 从配置获取API密钥
    api_key = entry.data[CONF_API_KEY]
    update_interval = entry.options.get(
        CONF_UPDATE_INTERVAL, DEFAULT_UPDATE_INTERVAL
    )
    
    # 初始化API客户端
    api = WeatherAPI(api_key)
    
    # 创建数据更新协调器
    coordinator = WeatherDataUpdateCoordinator(
        hass,
        api=api,
        update_interval=timedelta(minutes=update_interval),
    )
    
    # 存储协调器和配置
    hass.data.setdefault(DOMAIN, {})[entry.entry_id] = {
        "coordinator": coordinator,
        "api": api
    }
    
    # 加载初始数据
    await coordinator.async_config_entry_first_refresh()
    
    # 设置平台
    await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
    
    # 注册服务
    async def handle_refresh_service(call):
        """手动刷新天气数据服务"""
        _LOGGER.info("手动触发天气数据刷新")
        await coordinator.async_request_refresh()
    
    hass.services.async_register(
        DOMAIN, "refresh_data", handle_refresh_service
    )
    
    return True

class WeatherDataUpdateCoordinator(DataUpdateCoordinator):
    """天气数据更新协调器"""
    
    def __init__(self, hass, api, update_interval):
        self.api = api
        self.weather_data = None
        
        super().__init__(
            hass,
            _LOGGER,
            name=DOMAIN,
            update_interval=update_interval,
        )
    
    async def _async_update_data(self):
        """获取天气数据"""
        try:
            data = await self.api.get_weather_forecast()
            
            # 检测警报条件
            if data.get("alert", False):
                # 发布警报事件
                self.hass.bus.async_fire(
                    f"{DOMAIN}_alert",
                    {
                        "alert_type": data["alert_type"],
                        "severity": data["severity"],
                        "message": data["alert_message"],
                        "timestamp": data["alert_time"]
                    }
                )
                
                # 调用通知服务
                await self.hass.services.async_call(
                    "persistent_notification",
                    "create",
                    {
                        "title": f"天气警报: {data['alert_type']}",
                        "message": data["alert_message"],
                        "notification_id": f"{DOMAIN}_alert"
                    }
                )
            
            return data
            
        except WeatherAPIError as err:
            raise UpdateFailed(f"无法获取天气数据: {err}") from err
7.2.2 传感器平台实现
# sensor.py
from homeassistant.components.sensor import SensorEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity import DeviceInfo
from homeassistant.helpers.update_coordinator import CoordinatorEntity

from .const import DOMAIN, MANUFACTURER, MODEL

async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry, async_add_entities):
    """设置天气传感器"""
    coordinator = hass.data[DOMAIN][entry.entry_id]["coordinator"]
    
    # 添加传感器实体
    async_add_entities([
        TemperatureSensor(coordinator, entry),
        HumiditySensor(coordinator, entry),
        PrecipitationSensor(coordinator, entry)
    ])

class WeatherSensor(CoordinatorEntity, SensorEntity):
    """天气传感器基类"""
    
    def __init__(self, coordinator, entry):
        super().__init__(coordinator)
        self._entry_id = entry.entry_id
        self._attr_device_info = DeviceInfo(
            identifiers={(DOMAIN, entry.unique_id)},
            name="天气警报系统",
            manufacturer=MANUFACTURER,
            model=MODEL,
            sw_version="1.0.0"
        )
    
    @property
    def available(self):
        """传感器可用性"""
        return self.coordinator.data is not None

class TemperatureSensor(WeatherSensor):
    """温度传感器"""
    
    def __init__(self, coordinator, entry):
        super().__init__(coordinator, entry)
        self._attr_unique_id = f"{entry.unique_id}_temperature"
        self._attr_name = "室外温度"
        self._attr_unit_of_measurement = "°C"
        self._attr_icon = "mdi:thermometer"
        self._attr_state_class = "measurement"
        self._attr_device_class = "temperature"
    
    @property
    def state(self):
        """返回当前温度"""
        return self.coordinator.data.get("temperature")

class HumiditySensor(WeatherSensor):
    """湿度传感器"""
    
    def __init__(self, coordinator, entry):
        super().__init__(coordinator, entry)
        self._attr_unique_id = f"{entry.unique_id}_humidity"
        self._attr_name = "室外湿度"
        self._attr_unit_of_measurement = "%"
        self._attr_icon = "mdi:water-percent"
        self._attr_state_class = "measurement"
        self._attr_device_class = "humidity"
    
    @property
    def state(self):
        """返回当前湿度"""
        return self.coordinator.data.get("humidity")

class PrecipitationSensor(WeatherSensor):
    """降水量传感器"""
    
    def __init__(self, coordinator, entry):
        super().__init__(coordinator, entry)
        self._attr_unique_id = f"{entry.unique_id}_precipitation"
        self._attr_name = "今日降水量"
        self._attr_unit_of_measurement = "mm"
        self._attr_icon = "mdi:weather-rainy"
        self._attr_state_class = "total_increasing"
        self._attr_device_class = "precipitation"
    
    @property
    def state(self):
        """返回今日降水量"""
        return self.coordinator.data.get("precipitation")
7.2.3 二进制传感器实现
# binary_sensor.py
from homeassistant.components.binary_sensor import (
    BinarySensorEntity,
    BinarySensorDeviceClass
)
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.update_coordinator import CoordinatorEntity

from .const import DOMAIN

async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry, async_add_entities):
    """设置天气警报二进制传感器"""
    coordinator = hass.data[DOMAIN][entry.entry_id]["coordinator"]
    async_add_entities([WeatherAlertBinarySensor(coordinator, entry)])

class WeatherAlertBinarySensor(CoordinatorEntity, BinarySensorEntity):
    """天气警报二进制传感器"""
    
    def __init__(self, coordinator, entry):
        super().__init__(coordinator)
        self._entry_id = entry.entry_id
        self._attr_unique_id = f"{entry.unique_id}_alert"
        self._attr_name = "天气警报"
        self._attr_device_class = BinarySensorDeviceClass.SAFETY
        self._attr_icon = "mdi:alert-circle"
    
    @property
    def is_on(self):
        """返回是否有活跃警报"""
        return self.coordinator.data.get("alert", False)
    
    @property
    def extra_state_attributes(self):
        """返回额外属性"""
        if not self.coordinator.data or not self.is_on:
            return {}
            
        return {
            "alert_type": self.coordinator.data.get("alert_type"),
            "severity": self.coordinator.data.get("severity"),
            "message": self.coordinator.data.get("alert_message"),
            "alert_time": self.coordinator.data.get("alert_time")
        }

8. 性能优化与最佳实践

8.1 API调用性能优化

优化策略实现方法性能提升适用场景
批量操作使用 asyncio.gather 并行调用3-5倍多设备同时控制
数据缓存@cached_property 缓存计算结果减少90%重复计算传感器属性计算
延迟加载按需初始化组件启动时间减少40%资源密集型集成
节流控制Throttle 装饰器限制调用频率API请求减少60%第三方API调用

8.2 代码示例:性能优化实现

# 使用缓存提高属性访问性能
from homeassistant.helpers.decorator import cached_property

class OptimizedSensor(SensorEntity):
    """优化性能的传感器示例"""
    
    @cached_property
    def battery_percentage(self):
        """缓存电池百分比计算结果"""
        voltage = self.coordinator.data.get("voltage")
        if voltage is None:
            return None
            
        # 复杂计算仅执行一次并缓存
        return max(0, min(100, (voltage - 2.5) * 20))

# 使用节流控制API调用频率
from homeassistant.helpers.throttle import Throttle

class ThrottledWeatherAPI:
    """带节流控制的天气API客户端"""
    
    def __init__(self, api_key):
        self.api_key = api_key
        self._session = aiohttp.ClientSession()
        
    @Throttle(timedelta(minutes=5))  # 限制5分钟最多调用一次
    async def get_weather_data(self, location):
        """获取天气数据,带节流控制"""
        url = f"https://api.weather.com/data?key={self.api_key}&q={location}"
        async with self._session.get(url) as response:
            return await response.json()

# 使用并行调用加速多设备控制
async def control_all_lights(hass, turn_on=True):
    """并行控制所有灯光"""
    # 获取所有灯光实体
    light_entities = [
        entity_id for entity_id in hass.states.async_entity_ids("light")
        if "living" in entity_id
    ]
    
    if not light_entities:
        return
        
    # 创建并行任务
    service = "turn_on" if turn_on else "turn_off"
    tasks = [
        hass.services.async_call(
            "light", service, {"entity_id": entity_id}, blocking=False
        )
        for entity_id in light_entities
    ]
    
    # 并行执行
    await asyncio.gather(*tasks)
    _LOGGER.info(f"已{service} {len(light_entities)}个灯光设备")

8.3 错误处理最佳实践

async def robust_api_call(hass, retries=3):
    """健壮的API调用实现,带重试机制"""
    backoff = ExponentialBackoff(initial_delay=1, factor=2, maximum=10)
    
    for attempt in range(retries):
        try:
            return await hass.services.async_call(
                "remote", "send_command", 
                {"entity_id": "remote.living_room", "command": "power_on"},
                blocking=True, return_response=True
            )
            
        except ServiceNotFound:
            _LOGGER.error("远程控制服务未找到")
            return False
            
        except Unauthorized:
            _LOGGER.error("权限不足,无法执行操作")
            return False
            
        except Exception as err:
            if attempt == retries - 1:  # 最后一次尝试
                _LOGGER.exception(f"API调用失败,已重试{retries}次")
                raise
                
            delay = backoff.exponential_delay(attempt)
            _LOGGER.warning(f"API调用失败,{delay:.1f}秒后重试: {str(err)}")
            await asyncio.sleep(delay)
    
    return False

9. 安全最佳实践

9.1 认证与授权实现

from homeassistant.components import auth
from homeassistant.core import callback

async def async_setup_security(hass):
    """设置安全相关服务与权限"""
    # 创建权限组
    await auth.async_create_group(
        hass,
        name="home_automation_admins",
        description="家庭自动化管理员",
        policies=["can_control_security", "can_manage_devices"]
    )
    
    # 注册需要权限的服务
    @callback
    async def secure_service_handler(call):
        """需要特定权限的服务"""
        user = await auth.async_get_user(hass, call.context.user_id)
        if not user:
            raise Unauthorized("用户不存在")
            
        # 检查用户是否有权限
        if not await auth.async_user_has_permission(
            hass, user.id, "can_control_security"
        ):
            raise Unauthorized(f"用户 {user.name} 无安全控制权限")
            
        # 执行安全操作
        _LOGGER.info(f"用户 {user.name} 执行了安全操作")
    
    hass.services.async_register(
        "security", "arm_system", secure_service_handler
    )

10. 总结与进阶学习

10.1 核心知识点回顾

本文详细介绍了Home Assistant API的四大核心模块:

  • 事件总线:实现组件间松耦合通信的基础
  • 服务系统:封装可重用功能的标准接口
  • 状态管理:跟踪与更新实体状态的核心机制
  • 配置管理:处理集成生命周期与用户设置

10.2 进阶学习资源

  1. 官方文档:深入学习可访问Home Assistant开发者文档
  2. 社区集成:研究homeassistant/components目录下的官方集成
  3. 代码示例库:查看script/hassfest中的工具与示例代码
  4. 测试框架:学习tests/目录下的单元测试与集成测试实现

10.3 下期预告

下一篇我们将探讨"Home Assistant高级自动化:使用机器学习预测家庭能源使用",通过API集成TensorFlow模型实现智能能源管理。

如果觉得本文有价值,请点赞、收藏并关注,不错过更多Home Assistant开发技巧!

【免费下载链接】core home-assistant/core: 是开源的智能家居平台,可以通过各种组件和插件实现对家庭中的智能设备的集中管理和自动化控制。适合对物联网、智能家居以及想要实现家庭自动化控制的开发者。 【免费下载链接】core 项目地址: https://gitcode.com/GitHub_Trending/co/core

创作声明:本文部分内容由AI辅助生成(AIGC),仅供参考

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