Uptime format

[nightfever]

I am getting my network devices’ uptime (device_class: timestamp) from the Ubiquity Unify intergration in this format:

2021-04-20T10:31:33.497185+02:00

Can anyone please help me to bring this into a better readable format like 20.04.2021 10:31 ?
I guess I have to to do this with a template sensor? But I have no clue how the formula would look like.

[nickrout]

The EPIC Time Conversion and Manipulation Thread!

After seeing many threads on the forum asking for help with time conversions and calculations using time and realizing I generally had no real understanding of how time worked in HA I decided to dig in and try to figure it out. After over a week of internet and forum searches I think I’ve now got a lot of it figured out. I’m sure there is more that I don’t have here because sometimes “you don’t know what you don’t know”. So, since I didn’t know this stuff and because of the number of other pos…

[nightfever]

Thanks for the shortcut. This too complex to read for a little cosmetic issue, imho.

[nickrout]

Man sorry for troubling you with all that new fangled learning stuff.

{{ states('sensor.uptime')|as_timestamp|timestamp_custom ('%d.%m.%Y %H:%M') }}}

[Troon]

Click the link indicated by the blue arrow on your system: takes you here:

Templating

[nightfever]

@nickrout

Man sorry for troubling you with all that new fangled learning stuff.

I really appreciate your help. I am willing to learn but that epic thread was a bit overwhealming. I am taking that string as a starting point to reproduce and learn.

It does not seem to work, though:

[Troon]

%H:%M not %H%:M. There was a typo in @nickrout’s suggestion, but realistically, you should try to understand the code enough to spot errors in people’s untested suggestions.

{{ states('sensor.last_boot')|as_timestamp()|timestamp_custom('%d.%m.%Y %H:%M') }}

[nickrout]

@Troon

%H:%M not %H%:M.

I fixed it, but thanks for seeing my error.

[nickrout]

@nightfever

I really appreciate your help. I am willing to learn but that epic thread was a bit overwhealming.

And sorry if I was a bit sarcastic.

[parautenbach (Pieter Rautenbach)]

I would like to check my own understanding here: That timestamp seems to be in the correct ISO format and the device class is timestamp, so HA will generally handle it properly (like using it on an entity card it won’t show milliseconds). Shouldn’t this be merely a case of presentation, meaning, how a datetime gets displayed is a browser localisation thing? Or am I stumbling across a larger conversation here (I’ve read the mega thread before but don’t recall something like this now)?