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38 lines
1.1 KiB
Markdown
38 lines
1.1 KiB
Markdown
# Jinja Transformation Service
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Transforms a value using a jinja template.
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The main purpose of this transformer is the use in the home assistant discovery. Therfore not all features of the home assistant templating are supported.
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Basically on [Processing incoming data](https://www.home-assistant.io/docs/configuration/templating/#processing-incoming-data)
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## Available variables
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| Variable | Description |
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|------------|------------------------------------|
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| value | The incoming value. |
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| value_json | The incoming value parsed as JSON. |
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## Examples
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### Basic Example
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Given the value
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```
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{"Time":"2019-01-05T22:45:12","AM2301":{"Temperature":4.7,"Humidity":93.7},"TempUnit":"C"}
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```
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the template
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::: v-pre
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`{{value_json['AM2301'].Temperature}}`
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:::
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extracts the string `4.7`.
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## Further Reading
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* Wikipedia on [Jinja](https://en.wikipedia.org/wiki/Jinja_(template_engine).
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* Home assistant [discovery](https://www.home-assistant.io/docs/mqtt/discovery/).
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* Home assistant [templating](https://www.home-assistant.io/docs/configuration/templating/).
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