It would clean up a lot of my config, if I just could add filters to sensors (in YAML and/or UI) like you can do in ESPHome (https://esphome.io/components/sensor/index.html?highlight=filter#sensor-filters).
At the moment I have to use a filter sensor - so I have two sensors for one entity in my config and one of them is useless for me (and that adds up). This also means that you have to maintain two sensors instead of one if something changes.
Additionally there could be a template-filter which could replace many template sensors (of course only the template sensors that only need to be updated with that one entity).
Possible duplicate of this request? Or is yours something entirely different?
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You’re right. Sorry for that. I flagged it to get it closed/deleted, as it seems that I can’t delete it myself.
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