Trend Line not live function

[massimiliano.casini]

Hi there,

I have a simple widget oh-label-card into a page UI of OpenHab 3.2 with trend line item set.

The widget displays the numerical data and the trend line correctly but the trend line does not update, only one browser refresh updates the it’s curve.

Is there any way to fix this?

[rlkoshak (Rich Koshak)]

No, as I understand it the graph is only rendered when the widget is initially created. It would have to be constantly polling the persistence REST API endpoints to keep up to date which is not supported as I understand it.

[sidamos]

There is a workaround:

Auto-refresh charts and widgets in MainUI

As people migrate over to OH3 and the MainUI from other UIs, many are surprised to find that MainUI charts are static on a loaded page and won’t refresh unless the page is reloaded. Here I’m providing a fairly simple solution that allows you to set up timed, automatic refreshes for charts on a page (or another widget that you have configured with custom content that doesn’t refresh). When Do Widgets Refresh? So many of the standard widgets and components do respond to changes in item states …