Yes that’s it.
In any case, this is only a way of learning what can be done, I’m not using in my configuration.
I made some progress. When I try this:
This is what gets written to file1.txt
{'temperature': 21.0, 'humidity': 13.6}
See what this does for you:
sequence:
- service: notify.file1
data:
message: >
{% set t = states('input_number.temperature') | float %}
{% set h = states('input_number.humidity') | float %}
{{ '{{{ "temperature": %f, "humidity": %f }}}' | format(t, h) }}
mode: single
The hurdle might be that some JSON interpreters insist upon the use of double, not single, quotes. So it will depend on whatever is consuming this data.
2 Likes
Yes, now the output is what you said.
What is the meaning of the three curly braces around the message?
Escapes the meaning of the brace for more than one level of processing.
If you use only two braces, the Jinja2 interpreter thinks they belong to it but will then complain because it finds two nested sets of double braces (which is invalid).
1 Like
Glad to hear it.
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Of course. Done.
Thank you for your explanation.
1 Like
Clever 
I don’t understand why
{{ { "temperature": 23.780000, "humidity": 78.000000 } }}
renders as
{'temperature': 23.78, 'humidity': 78.0}
though. Why the double to single quote, and why the number formating?
And yeah, unfortunately, JSON mandates double-quotes for string, albeit some libraries might be lenient.
Because
renders a python dictionary, not JSON.
That’s just what python does
python doesn’t care if a string starts with a ’ or ", it uses them interchangeably wherever it see’s fit.