Off-set not applied to prediction graph

[DrJohnT]

The below image is of Willy Weather on RHS, my button card which shows the correct off-set value for high tide. However, the graph on lower LHS clearly shows high tide has passed. So I presume that the off-set is not been applied to the tide prediction data.

Regards,

Your other user Dr John

[ianByrne]

Aha! Thanks for the heads up. It looks like it's a timezone issue - the tide data is being displayed in UTC on the chart.

You can confirm the offsets are being applied correctly by checking the predictions attribute of the sensor - the list of high/low events should (hopefully) be matching the Willy Weather times with its offsets.

Here is an update to the Lovelace Card's yaml to display the events in local time - just replace the data_generator bit with the below:

    data_generator: |
      return entity.attributes.predictions.map((event) => {
        return [moment.utc(event[0]).local(), event[1]];
      });

Thanks again - I'll update the docs shortly.

[ianByrne]

Also, if you happen to work out how to get rid of that wonky line running along the bottom of your chart, do please let me know... I've seen it popup a couple times on my end too, but not entirely sure what's causing it - I suspect it's something in the ApexCharts configuration aswell

[DrJohnT]

Wow! What service! Any idea what causes the straight line at the bottom of the graph?

My graph YAML looks like this (including your update already).

type: 'custom:apexcharts-card'
header:
  show: true
  title: IoD Tide
  show_states: false
graph_span: 2d
span:
  start: hour
  offset: '-5h'
now:
  show: true
  label: now
series:
  - entity: sensor.north_woolwich_tide
    extend_to_end: false
    unit: m
    data_generator: |
      return entity.attributes.predictions.map((event) => {
        return [moment.utc(event[0]).local(), event[1]];
      });

[DrJohnT]

We were clearly thinking on the same lines at the same time. I have no idea where it comes from...

[DrJohnT]

Wonky line has now gone after your update just now. Thanks!

[ianByrne]

Very peculiar... The only update was to the docs, so it looks like it somehow fixed itself. I suspect it's something that only pops up when there's a certain threshold being exceeded in the start and end dates. If you see it again, please try to grab the data from the predictions attribute, and I'll see if I can reproduce it to find a fix.

[DrJohnT]

Ian This morning the wonky line is back. Here is the predictions data:

attribution: Data provided by UK Hydrographic Office
predictions:
  - - '2021-04-06 21:13:00'
    - 5.6
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
  - - '2021-04-07 03:37:00'
    - 1.5
  - - '2021-04-07 10:01:00'
    - 6.1
  - - '2021-04-07 16:17:00'
    - 1.7
  - - '2021-04-07 22:45:00'
    - 5.9
  - - '2021-04-08 05:19:00'
    - 1.2
  - - '2021-04-08 11:22:00'
    - 6.5
  - - '2021-04-08 17:38:00'
    - 1.4
  - - '2021-04-08 23:52:00'
    - 6.3
  - - '2021-04-09 06:30:00'
    - 0.8
  - - '2021-04-09 12:19:00'
    - 6.8
  - - '2021-04-09 18:37:00'
    - 1.1
  - - '2021-04-10 00:41:00'
    - 6.6
  - - '2021-04-10 07:20:00'
    - 0.6
  - - '2021-04-10 13:03:00'
    - 7
  - - '2021-04-10 19:25:00'
    - 1
  - - '2021-04-11 01:20:00'
    - 6.8
  - - '2021-04-11 07:58:00'
    - 0.6
  - - '2021-04-11 13:41:00'
    - 7
  - - '2021-04-11 20:04:00'
    - 0.9
  - - '2021-04-12 01:54:00'
    - 6.9
  - - '2021-04-12 08:29:00'
    - 0.6
  - - '2021-04-12 14:13:00'
    - 6.9
  - - '2021-04-12 20:39:00'
    - 0.9
  - - '2021-04-13 02:24:00'
    - 7
  - - '2021-04-13 08:53:00'
    - 0.6
  - - '2021-04-13 14:42:00'
    - 7
  - - '2021-04-13 21:10:00'
    - 0.8
next_low_tide_in: 6h 51m
next_low_tide_height: 1.7m
next_high_tide_in: 0h 35m
next_high_tide_height: 6.1m
friendly_name: IoD Tide
icon: 'mdi:transfer-up'

[ianByrne]

Hmm looks like a lot of duplicate events were gradually being added to the collection. I've now pushed a small update to clear them out, hopefully it will prevent any wonky lines from slowly creeping in.

[DrJohnT]

I can confirm the pretty chart now has no wonky line. I also took the liberty of creating a pull request to icons and logos for UKHO which you can see here https://github.com/home-assistant/brands/pull/2410

[ianByrne]

That's great, thanks a bunch for your help!