A question about automation

Configuration
1

As we all know, an automation has trigger, condition and action. In the part of action, can i send a http request? Just like, when the light turned on, call a restful API do something.

2
1 Like
3

@anon43302295 Thanks a lot for your reply! I’ve seen this link and tried it. Actually it told me how to add a rest_command to configuration.yaml, and I can call it in automation. But how to call it? Like another automation rule,

   - alias: open light when switch off
      initial_state: true
      trigger: 
        - platform: state
          entity_id: switch.plug_158d0001b8e41d
          from: 'on'
          to: 'off'
      action:
        - service: light.turn_on
          entity_id: light.gateway_light_7811dcaf1e8a

If i want to call a rest_command in an automation rule, how to define the part of action?

4

Look at the part which says “the name used to expose the service”.

The service is what your automation calls. Instead of light.turn_on, you would call your service.

2 Likes
5

oh got it. I asked a silly question… One more question, i tried get method and succeeded. When i used post method, how to add parameters? Like some json strings that contain the information i want to send. I add a string in payload field but terminal told me wrong like follow:

ERROR:homeassistant.core:Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/home/sun/.local/lib/python3.5/site-packages/homeassistant/components/rest_command.py", line 99, in async_service_handler
    headers=headers
  File "/home/sun/.homeassistant/deps/lib/python3.5/site-packages/aiohttp/helpers.py", line 99, in __iter__
    ret = yield from self._coro
  File "/home/sun/.homeassistant/deps/lib/python3.5/site-packages/aiohttp/client.py", line 267, in _request
    conn = yield from self._connector.connect(req)
  File "/home/sun/.homeassistant/deps/lib/python3.5/site-packages/aiohttp/connector.py", line 402, in connect
    proto = yield from self._create_connection(req)
  File "/home/sun/.homeassistant/deps/lib/python3.5/site-packages/aiohttp/connector.py", line 748, in _create_connection
    _, proto = yield from self._create_direct_connection(req)
  File "/home/sun/.homeassistant/deps/lib/python3.5/site-packages/aiohttp/connector.py", line 831, in _create_direct_connection
    req=req, client_error=client_error)
  File "/home/sun/.homeassistant/deps/lib/python3.5/site-packages/aiohttp/connector.py", line 796, in _wrap_create_connection
    return (yield from self._loop.create_connection(*args, **kwargs))
  File "/usr/lib/python3.5/asyncio/base_events.py", line 682, in create_connection
    yield from self.sock_connect(sock, address)
  File "/usr/lib/python3.5/asyncio/selector_events.py", line 402, in sock_connect
    return (yield from fut)
  File "/usr/lib/python3.5/asyncio/futures.py", line 361, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/usr/lib/python3.5/asyncio/tasks.py", line 296, in _wakeup
    future.result()
  File "/usr/lib/python3.5/asyncio/futures.py", line 266, in result
    raise CancelledError
concurrent.futures._base.CancelledError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/sun/.local/lib/python3.5/site-packages/homeassistant/components/rest_command.py", line 99, in async_service_handler
    headers=headers
  File "/home/sun/.local/lib/python3.5/site-packages/async_timeout/__init__.py", line 35, in __exit__
    self._do_exit(exc_type)
  File "/home/sun/.local/lib/python3.5/site-packages/async_timeout/__init__.py", line 80, in _do_exit
    raise asyncio.TimeoutError
concurrent.futures._base.TimeoutError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/home/sun/.local/lib/python3.5/site-packages/homeassistant/core.py", line 1031, in _event_to_service_call
    yield from service_handler.func(service_call)
  File "/home/sun/.local/lib/python3.5/site-packages/homeassistant/components/rest_command.py", line 109, in async_service_handler
    _LOGGER.warning("Timeout call %s.", request.url)
UnboundLocalError: local variable 'request' referenced before assignment
6

You’ll get better help if you show exactly what you tried. It is hard to know what might have gone wrong with “some json strings”.

7

Yeah, it’s my fault.
This is the define in configuration.

rest_command:
example_request:
url: ‘http://10.131.253.99:8080/smartLab/paper’
method: post
payload: ‘hello’

This is the call in automation.

  • alias: open light when switch off
    initial_state: true
    trigger:
    • platform: state
      entity_id: light.gateway_light_7811dcaf1e8a
      from: ‘off’
      to: ‘on’
      action:
    • service: rest_command.example_request

What i want is when the state of device change (it’s light in this example), hass will send a http request to the server with information about the device (i just used “hello” to test in this example).