Use variable in if/else to check attribute

[123 (Taras)]

Good point. Speaking of data_template, check out this unforseen side-effect of making data the equivalent of data_template.

MQTT Script fails with "Error rendering data template: UndefinedError: 'value_json' is undefined"

Ah ok,now I understand what you’re trying to do. The problem is that since 0.115, data and data_template are equivalent, therefore it interprets your payload as a template and and gives you the error. Try like this: "{{ '{{ value_json.FanSpeed }}' }}" Or without any brackets {{ value_json.FanSpeed }}

The goal is to publish a payload containing a template, but you don’t want the template to be evaluated simply published literally. It becomes a bit more complicated now that data works like data_template.

Sorry for hijacking the thread! (See you in the other thread if you want to continue the conversation)