在Hass上利用Chromecast state Event开关电视

在Hass上利用Chromecast state Event开关电视

连接智能红外遥控器（broadlink RM2）

官方文档中应该采用这个：Broadlink RM Switch
另一个“Broadlink RM2 and A1 sensor”仅用做传感器数据获取

官方文档理解起来有点困难。实际情况如下（其实都是按照文档来的）：

首先，添加配置代码：

- platform: broadlink
  host: 192.168.31.196
  mac: !secret broadlink_rm2_switch_mac
  friendly_name: "broadlink rm2"

可选的参数都不用填。

然后，后台会出现这样的信息：

... [homeassistant.loader] Loaded switch.broadlink from homeassistant.components.switch.broadlink
... [homeassistant.components.switch] Setting up switch.broadlink
... [homeassistant.core] Bus:Handling <Event service_registered[L]: service=learn_command_192_168_31_196, domain=broadlink>
... [homeassistant.core] Bus:Handling <Event service_registered[L]: service=send_packet_192_168_31_196, domain=broadlink>
（上面的...是省略的重复的日期信息）

但是前端页面并不出现任何新的swith图标。
不过，此时已经可以在开发者工具的“服务”页面看到一个叫做"broadlink"的服务了，它的可用服务是

learn_command_192_168_31_196 （显然后面这些数字是broadlink的ip）
send_packet_192_168_31_196

这两个服务就是官方文档提到的需要用到的两个服务。

获取遥控器的控制代码

官方文档：

Choose Call Service from the Developer Tools. Choose the service broadlink/learn_command from the list of Available services: and hit CALL SERVICE. Press the button on your remote with in 20 seconds. The packet will be printed as a persistent notification in the States page of the web interface.

就如字面意思：
1、在service页面找到domain "broadlink"，调用service "learn_command_192_168_31_196"
2、在20秒内按下电视遥控器的按键（我是按了power，因为我要开关机）
3、在state页面，搜索“packet”，可以看到梦寐以求的长串红外指令编码

然后按照文档增加配置内容成如下：

- platform: broadlink
  host: 192.168.31.196
  mac: !secret broadlink_rm2_switch_mac
  friendly_name: "broadlink rm2"
  switches:
    tv_skyworth:
      friendly_name: "Skyworth TV Power"
      command_on: !secret broadlink_rm2_switch_skywort_tv_on_packet # 为了保持整洁，我把红外线指令放到secret文件里面去了
      command_off: !secret broadlink_rm2_switch_skywort_tv_on_packet

重启hass

可以看到开关"Skyworth TV Power"出现在前端页面上了。

准备工作已做好，整理一下思路

trigger:
检查chromecast的状态，它是个mediaplayer
condition:
检查电视机的ip状态，它是个sensor
action:
向智能红外遥控器发送打开电视的指令，它是个switch

在配置文件中添加automation如下：

- alias: 'TV power on when Chromecast playing'
  trigger:
    - platform: state
      entity_id: media_player.living_room_tv
      from: 'off'
      to: 'idle' # start to play video. The next state change will be "idle to playing"
    - platform: state
      entity_id: media_player.living_room_tv
      from: 'off'
      to: 'playing' # maybe sometime state will directly be changed from "off" to "playing" ? i don't know
  condition:
    condition: state
    entity_id: binary_sensor.skyworth_tv
    state: 'off' # tv ip address not detected
  action:
    - service: media_player.media_pause # waiting for tv power on
      entity_id: media_player.living_room_tv
    - service: switch.turn_on
      entity_id: switch.skyworth_tv_power
    - delay: '00:00:30' # left some seconds for tv power on
    - service: media_player.media_play # continue playing
      entity_id: media_player.living_room_tv

这样就好了。
重启hass。
对google home说 “play movie on tv”，就可以自动启动电视了。