Nest Automatic Humidity Control

krock · November 13, 2019, 6:27pm

another question - will this work if you have ‘migrated’ your account to google from the original nest account?

joe248 · November 13, 2019, 9:56pm

The Nest public API doesn’t allow you to set the target humidity, but this uses the private API which does allow you to. However, Nest just made a change that broke the PHP Nest login, at least for those with original Nest accounts. Apparently if you’ve migrated to a Google account it still works, but I haven’t had time to research that yet to be sure the Home Assistant Nest component still works if you migrate, or if there are other ramifications.

https://github.com/gboudreau/nest-api/issues/98

fancywater · November 14, 2019, 2:31am

Same here, this PHP script has stopped working for me, still on a Nest account for now, hesitant to migrate. I will be following this thread and the opened issue by joe248 with great interest as this humidity control automation was very useful to me. Thanks for the work that you are putting in and for sharing this.

joe248 · November 14, 2019, 5:00am

Take a look at my github issue - I posted a fix. Let me know if it works for you.

krock · November 15, 2019, 1:20pm

Thanks for all of your feedback - I hope to try this out this weekend.
Could you please help me understand what to use for login info - would this be our google login now after the migration?
define(‘USERNAME’, ‘YOUR_NEST_USERNAME’);
define(‘PASSWORD’, ‘YOUR_NEST_PASSWORD’);

joe248 · November 15, 2019, 2:06pm

Yes, it should just be whatever credentials you would use to log in to the Nest app.

krock · November 18, 2019, 2:41pm

Thanks Joe.
Has anyone had success with using another source of weather data to trigger this script?
I noticed that the WU API is not possible without a personal weather station (which I do not have).

joe248 · November 18, 2019, 3:21pm

I’ve been using Dark Sky. Set up the platform and then your shell command will become something like:

shell_command:
  update_nest_target_humidity: '/usr/bin/php /home/homeassistant/custom/scripts/update_nest_target_humidity.php {{states.sensor.dark_sky_temperature.state}} {{states.sensor.dark_sky_humidity.state}}'

krock · November 18, 2019, 4:44pm

thanks - is there a location where you have posted your latest code?

joe248 · November 18, 2019, 5:25pm

I just edited my original post with my current code. Not much has changed besides using Dark Sky instead of Weather Underground, and I now bump up the target humidity by 5% when the heat is running to improve efficiency with regards to usage of the furnace fan. See my comment in the code for the explanation.

krock · November 18, 2019, 6:24pm

Super - thanks Joe. I imagine the kitchen hvac sensor you reference is your nest?

joe248 · November 18, 2019, 6:51pm

That’s correct

krock · November 19, 2019, 2:43am

Hi everyone,

Sorry… newbie questions…

So far, I have done the following:

setup darksky API & added to configuration.yaml -> working!
downloaded the ’ nest.class.php nest API into director -> done
created a ’ update_nest_target_humidity.php’ file
a) updated the nest.class.php file location
b) updated my login information
added configuration.yaml changes -> not sure if I did this correctly…

some questions:

does the name of darksky need to match b/t what is called in the config & your trigger?
i.e. my configuration file states:

sensor:
  - platform: darksky

…whereas your configuration.yaml calls out

entity_id: sensor.dark_sky_temperature

Where do I add the start of your configuration update…? …the ‘configurator’ is flagging this

- alias: "Nest auto target humidity control"

end of the stream or a document separator is expected at line 69, column 1:
    - alias: "Nest auto target humid ... 
    ^

how do I tell HA that my nest is a sensor… do I need to add ad section in configuration.yaml for my nest?

THANKS!

joe248 · November 19, 2019, 3:16am

Dark Sky will add sensors with names like sensor.dark_sky_xxx for all monitored_conditions you have in your config. You’ll need to add at least ‘temperature’ and ‘humidity’ to your monitored_conditions list in your config.
Sorry this wasn’t more clear. This goes under your automations, so it should look like:

automation:
- alias: "Nest auto target humidity control"
...

Yes, you need to add the Nest integration to your configuration by following the instructions here

krock · November 20, 2019, 2:49pm

I think I have everything setup… but getting an error. My guess is that my Nest is not setup correctly in my configuration.yaml file. Could you please provide an example?

I think this might be the case since I cannot find a nest sensor similar as what you show in your example above:

 - platform: state
      entity_id: sensor.kitchen_thermostat_hvac_state

Error while executing automation automation.nest_auto_target_humidity_control. Unknown error for call_service at pos 1: 
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/automation/__init__.py", line 437, in action
    await script_obj.async_run(variables, context)
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 190, in async_run
    await self._handle_action(action, variables, context)
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 274, in _handle_action
    await self._actions[_determine_action(action)](action, variables, context)
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 357, in _async_call_service
    context=context,
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 97, in async_call_from_config
    domain, service_name, service_data, blocking=blocking, context=context
  File "/usr/src/homeassistant/homeassistant/core.py", line 1236, in async_call
    await asyncio.shield(self._execute_service(handler, service_call))
  File "/usr/src/homeassistant/homeassistant/core.py", line 1261, in _execute_service
    await handler.func(service_call)
  File "/usr/src/homeassistant/homeassistant/components/shell_command/__init__.py", line 78, in async_service_handler
    process = await create_process
  File "/usr/local/lib/python3.7/asyncio/subprocess.py", line 217, in create_subprocess_exec
    stderr=stderr, **kwds)
  File "/usr/local/lib/python3.7/asyncio/base_events.py", line 1529, in subprocess_exec
    bufsize, **kwargs)
  File "/usr/local/lib/python3.7/asyncio/unix_events.py", line 190, in _make_subprocess_transport
    **kwargs)

joe248 · November 26, 2019, 3:46pm

It sounds like you don’t have a Nest developer account so you won’t be able to use the official Home Assistant Nest integration. However, you shouldn’t need it to use my script. Just remove the two automation triggers related to the thermostat and keep the outside temperature trigger.

krock · November 26, 2019, 6:20pm

thank you! I will try that today.

By the way, have you found your nest to report a fairly accurate humidity reading? Mine seems to report high (~15% higher than a handheld device). So, I was thinking of using a ‘DHT22’ sensor for reading the current humidity.

krock · November 27, 2019, 3:35am

Thanks @joe248. I tried removing the nest triggers.

looking at the error log some more, I think the issue is calling php. Since I am using hassio and not raspbian , i don’t find php in that directory either in bash… is there a way to check if php is indeed installed & determine the location?


FileNotFoundError: [Errno 2] No such file or directory: '/usr/bin/php': '/usr/bin/php'

joe248 · November 27, 2019, 7:29pm

I find my Nest to be within about 5% or so of other humidity sensors.

If you have PHP installed, running the command which php should tell you where it is located.

krock · November 28, 2019, 4:45am

thanks - I re-installed home assistant on top of raspbian. I think I finally configured it… but i keep seeing these errors:

humidity.log


11-28-2019 13:12:11 Setting Nest target humidity to 40% for outside temp 37.4 (current humidity inside = %, outside = 65.0%)
11-28-2019 13:12:12 ERROR: Nest returned:

sudo /usr/bin/php update_nest_target_humidity.php
PHP Notice:  Undefined offset: 0 in /home/homeassistant/.homeassistant/nest.class.php on line 895
PHP Notice:  Undefined property: stdClass::$link in /home/homeassistant/.homeassistant/nest.class.php on line 345
PHP Notice:  Trying to get property '' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 345
PHP Notice:  Trying to get property 'structure' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 345
PHP Notice:  Undefined offset: 1 in /home/homeassistant/.homeassistant/nest.class.php on line 345
PHP Notice:  Undefined property: stdClass::$ in /home/homeassistant/.homeassistant/nest.class.php on line 346
PHP Notice:  Trying to get property 'away' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 346
PHP Notice:  Undefined property: stdClass::$device in /home/homeassistant/.homeassistant/nest.class.php on line 347
PHP Notice:  Trying to get property '' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 347
PHP Notice:  Trying to get property 'current_schedule_mode' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 347
PHP Notice:  Undefined property: stdClass::$shared in /home/homeassistant/.homeassistant/nest.class.php on line 348
PHP Notice:  Trying to get property '' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 348
PHP Notice:  Trying to get property 'target_temperature_type' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 348
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PHP Notice:  Trying to get property 'mode' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 349
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PHP Notice:  Trying to get property 'away_temperature_low_enabled' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 357
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PHP Notice:  Trying to get property '' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 364
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PHP Notice:  Trying to get property '' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 368
PHP Notice:  Trying to get property 'away_temperature_high_enabled' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 368
PHP Notice:  Undefined property: stdClass::$shared in /home/homeassistant/.homeassistant/nest.class.php on line 399
PHP Notice:  Trying to get property '' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 399
PHP Notice:  Trying to get property 'current_temperature' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 399
PHP Notice:  Undefined offset: 0 in /home/homeassistant/.homeassistant/nest.class.php on line 895
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PHP Notice:  Trying to get property '' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 400
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PHP Notice:  Trying to get property 'last_connection' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 923
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PHP Notice:  Trying to get property 'leaf_threshold_cool' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 443
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PHP Notice:  Trying to get property 'has_humidifier' of non-object in /home/homeassistant/.homeassistant/nest.class.php on line 447
PHP Notice:  Undefined property: stdClass::$humidity in /home/homeassistant/.homeassistant/update_nest_target_humidity.php on line 16
PHP Fatal error:  Uncaught Exception: Missing input for outside temperature in /home/homeassistant/.homeassistant/update_nest_target_humidity.php:24
Stack trace:
#0 {main}
  thrown in /home/homeassistant/.homeassistant/update_nest_target_humidity.php on line 24