List of past values in a widget

Setup, Configuration and Use Widgets
1

I store meter values in a persitence via OH.
How can I display a list of values for every first of the month for the past 12 month?
Something like:
1.1.: 3456 kWh
1.2.: 4567 kWh
1.3.: 5678 kWh
1.4.: 6789 kWh
…
What makes it even more challenging is the fact that I don’t have values for 0:00 o’clock. So I need the first value for the first day of that month.

2

There is no way to do this with widgets alone.

Instead, you will need to create a string Item and use a rule to gather the data you require and then store the string formatted list in the string Item.

It will then be very easy to get that string Item state in a widget, convert it to a list and display it however you like.