Change direction of wind - template sensor

[vantech2020 (RussTech)]

Hi,

Maybe i am missing the obvious?

# Weather Meter
  - platform: template
    sensors:
     ext_weather_wind_dir:
      friendly_name: 'Wind Direction'
      value_template: >
          {% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %}
          {% set degree = states('sensor.external_wind_direction')|float %}
            {{ direction[((degree+11.25)/22.5)|int] }}
  

I am using this sensor to determine the direction of wind. The weather meter has been installed backwards (face palm) so south is north, and north is south. The above template gets a value between 0 and 360 (degree of wind).

How can i reverse the current setup, to correct the direction?

Thanks

[Didgeridrew]

You have two options… Rearrange your array of directions or apply offsets.

- platform: template
    sensors:
     ext_weather_wind_dir:
      friendly_name: 'Wind Direction'
      value_template: >
          {% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %}
          {% set degree = states('sensor.external_wind_direction')|float %}
          {% if degree >= 180 %}
            {% set degree = degree - 180  %}
          {% else %}
            {% set degree = degree + 180  %}
          {% endif %}
          {{ direction[((degree+11.25)/22.5)|int] }}

[hneel (Hans)]

This doesn’t work anymore for me.
My code (in template.yaml) is:

  - name: "tmpl_weather_wind_dir"
    unique_id: "tmpl_weather_wind_dir"
    state_class: measurement
    icon: mdi:sign-direction
    state: >
      {% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %}
      {% set degree = states('sensor.weather_wind_bearing')|float %}
      {{ degree }}
      {{ direction[((degree+11.25)/22.5)|int] }}
    availability: "{{ states('weather.home') not in [ 'unknown', 'unavailable'] }}"

Using value_template instead of state gave me an error, preventing restart.

With this code the system restarts, but the value of the sensor remains ‘unknown’.
And the logs show these errors:

Logger: homeassistant.components.template.template_entity
Source: components/template/template_entity.py:173
Integration: Template (documentation, issues)
First occurred: 13:11:40 (1 occurrences)
Last logged: 13:11:40

TemplateError('ValueError: Template error: float got invalid input 'unknown' when rendering template '{% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %} {% set degree = states('sensor.weather_wind_bearing')|float %} {{ degree }} {{ direction[((degree+11.25)/22.5)|int] }}' but no default was specified') while processing template 'Template("{% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %} {% set degree = states('sensor.weather_wind_bearing')|float %} {{ degree }} {{ direction[((degree+11.25)/22.5)|int] }}")' for attribute '_attr_native_value' in entity 'sensor.tmpl_weather_wind_dir'



Logger: homeassistant.helpers.event
Source: helpers/template.py:411
First occurred: 13:11:40 (1 occurrences)
Last logged: 13:11:40

Error while processing template: Template("{% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %} {% set degree = states('sensor.weather_wind_bearing')|float %} {{ degree }} {{ direction[((degree+11.25)/22.5)|int] }}")
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 1615, in forgiving_float_filter
    return float(value)
ValueError: could not convert string to float: 'unknown'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 409, in async_render
    render_result = _render_with_context(self.template, compiled, **kwargs)
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 1842, in _render_with_context
    return template.render(**kwargs)
  File "/usr/local/lib/python3.9/site-packages/jinja2/environment.py", line 1301, in render
    self.environment.handle_exception()
  File "/usr/local/lib/python3.9/site-packages/jinja2/environment.py", line 936, in handle_exception
    raise rewrite_traceback_stack(source=source)
  File "<template>", line 1, in top-level template code
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 1618, in forgiving_float_filter
    raise_no_default("float", value)
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 1331, in raise_no_default
    raise ValueError(
ValueError: Template error: float got invalid input 'unknown' when rendering template '{% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %} {% set degree = states('sensor.weather_wind_bearing')|float %} {{ degree }} {{ direction[((degree+11.25)/22.5)|int] }}' but no default was specified

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 525, in async_render_to_info
    render_info._result = self.async_render(variables, strict=strict, **kwargs)
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 411, in async_render
    raise TemplateError(err) from err
homeassistant.exceptions.TemplateError: ValueError: Template error: float got invalid input 'unknown' when rendering template '{% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %} {% set degree = states('sensor.weather_wind_bearing')|float %} {{ degree }} {{ direction[((degree+11.25)/22.5)|int] }}' but no default was specified

[Didgeridrew]

@hneel

Using value_template instead of state gave me an error, preventing restart.

value_template is used in the legacy template sensor method, it is not a valid configuration variable for the current method.

@hneel

ValueError: … but no default was specified

Updating Templates with the new default values in 2021.10.x

I keep seeing the same question about the new default argument for the templating. This post will cover all possible ways to define default. All the methods that were changed: acos as_timestamp asin atan atan2 cos float log round sin sqrt strptime tan timestamp_custom timestamp_local timestamp_utc Each of them have the exact same default functionality but a different number of arguments. There are multiple ways to use these functions, and this is where all the confusion lies. Understandi…

Also, it would probably be better if your state and availability templates are based on the same source:

  - name: "tmpl_weather_wind_dir"
    unique_id: "tmpl_weather_wind_dir"
    state_class: measurement
    icon: mdi:sign-direction
    state: >
      {% set direction = ['N','NNE','NE','ENE','E','ESE','SE','SSE','S','SSW','SW','WSW','W','WNW','NW','NNW','N'] %}
      {% set degree = states('sensor.weather_wind_bearing')|float(0) %}
      {{ degree }}
      {{ direction[ (( degree + 11.25) / 22.5) | int] }}
    availability: >
      {{ states('sensor.weather_wind_bearing') not in [ 'unknown', 'unavailable', '', none] }}