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Added documentation for the env_var tag in configuration files (#2982)

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Corey Pauley 2017-07-24 10:59:54 -05:00 committed by Paulus Schoutsen
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commit de4f34867e
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source/_docs/configuration/yaml.markdown
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@ -61,3 +61,20 @@ sensor:
state_topic: sensor2/topic state_topic: sensor2/topic
``` ```
### {% linkable_title Using Environment Variables %}
You can include values from your system's environment variables with `!env_var`.
```yaml
http:
api_password: !env_var PASSWORD
```
#### Default Value
If an environment variable is not set, you can fallback to a default value.
```yaml
http:
api_password: !env_var PASSWORD default_password
```