Template optimisation question for last_seen datetime sensor

[123 (Taras)]

There's no need to tag me directly. This community has nearly 131 thousand members so someone is likely to come to your assistance.

Your template is using functions/filters that require a default value.

Updating Templates with the new default values in 2021.10.x

I keep seeing the same question about the new default argument for the templating. This post will cover all possible ways to define default. All the methods that were changed: acos as_timestamp asin atan atan2 cos float log round sin sqrt strptime tan timestamp_custom timestamp_local timestamp_utc Each of them have the exact same default functionality but a different number of arguments. There are multiple ways to use these functions, and this is where all the confusion lies. Understandi…