在haas on Raspberry 上设置一个random sensor触发的alert及automation

在haas on Raspberry 上设置一个random sensor触发的alert及automation

用automation来触发twitter

- alias: 'Random sensor trigger twitter'
  trigger:
    platform: state
    entity_id: binary_sensor.random_change
    to: "on"
  action:
    service: notify.twitter_wang3an
    data:
      message: A random value less than 50 triggered this.

像上面这样写，只触发一次就没动静了，为什么呢？
看日志：

Oct 27 18:41:55 raspberrypi hass[941]: 2017-10-27 18:41:55 INFO (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: entity_id=sensor.random_1, old_state=<state sensor.random_1=84; icon=mdi:hanger, friendly_name=random 1 @ 2017-10-27T18:41:24.308602+08:00>, new_state=<state sensor.random_1=27; icon=mdi:hanger, friendly_name=random 1 @ 2017-10-27T18:41:55.307233+08:00>>
^---- 上面这句是说：random值变了
Oct 27 18:41:55 raspberrypi hass[941]: 2017-10-27 18:41:55 INFO (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: entity_id=binary_sensor.random_change, old_state=<state binary_sensor.random_change=off; friendly_name=A random value less than 50 @ 2017-10-27T18:38:18.315139+08:00>, new_state=<state binary_sensor.random_change=on; friendly_name=A random value less than 50 @ 2017-10-27T18:41:55.316416+08:00>>
^---- 上面这句说：binary_sensor.random_change的值变成on了（符合预期）
Oct 27 18:41:55 raspberrypi hass[941]: 2017-10-27 18:41:55 INFO (MainThread) [homeassistant.components.automation] Executing Random sensor trigger twitter
^---- 上面这句说：执行automation中（符合预期）
Oct 27 18:41:55 raspberrypi hass[941]: 2017-10-27 18:41:55 INFO (MainThread) [homeassistant.core] Bus:Handling <Event logbook_entry[L]: entity_id=automation.random_sensor_trigger_twitter, name=Random sensor trigger twitter, domain=automation, message=has been triggered>
^---- 写日志文件
Oct 27 18:41:55 raspberrypi hass[941]: 2017-10-27 18:41:55 INFO (MainThread) [homeassistant.helpers.script] Script Random sensor trigger twitter: Running script
^---- 运行scrip中
Oct 27 18:41:55 raspberrypi hass[941]: 2017-10-27 18:41:55 INFO (MainThread) [homeassistant.helpers.script] Script Random sensor trigger twitter: Executing step call service
^---- 可以call service了（符合预期）
Oct 27 18:41:55 raspberrypi hass[941]: 2017-10-27 18:41:55 INFO (MainThread) [homeassistant.core] Bus:Handling <Event call_service[L]: service=twitter_wang3an, domain=notify, service_data=message=A random value less than 50 triggered this., service_call_id=1971673456-3>
^---- bus处理事件：调用service=twitter_wang3an（符合预期）
Oct 27 18:41:56 raspberrypi hass[941]: 2017-10-27 18:41:56 ERROR (Thread-5) [homeassistant.components.notify.twitter] Error 403: [{'message': 'Status is a duplicate.', 'code': 187}]
^---- 返回错误：Status is a duplicate。莫非是twitter防止灌水用的？
Oct 27 18:41:56 raspberrypi hass[941]: 2017-10-27 18:41:56 INFO (MainThread) [homeassistant.core] Bus:Handling <Event service_executed[L]: service_call_id=1971673456-3>
^---- 调用结束

信息里面有一个：
Error 403: [{'message': 'Status is a duplicate.', 'code': 187}]
原来是twitter干的：防止重复发送
参见：https://twittercommunity.com/t/status-is-a-duplicate/16928

修改一下触发后发送的内容：

- alias: 'Random sensor trigger twitter'
  trigger:
    platform: state
    entity_id: binary_sensor.random_change
    to: "on"
  action:
    service: notify.twitter_wang3an
    data:
      message: A random value less than 50 triggered this.

小坑

• 你可以在alias的平级增加id: 1508639450841这样一行（数字任意，避免和现有id重复）
  这样就可以在hass的前端的configuration模块中，被automation模块识别列出了
  但是：
  一旦你对任何一个automaiton模块进行修改和保存，那么automations.xml中的所有内容都会被重写。
  功能虽正常，但注释全被销毁，语句顺序也发生一定的变化。
  所以还是别这样搞了。