Some add-ons use `---` separators which causes issues when rendering the documentation in Main UI.
Fixes #13953
Signed-off-by: Wouter Born <github@maindrain.net>
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-layout: documentation
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-{% include base.html %}
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# WeatherUnderground Binding
This binding uses the [Weather Underground service](https://www.wunderground.com/weather/api/) for providing weather information for any location worldwide.
**IMPORTANT:**
When creating a custom datasource in the `rrd4j.cfg` file the used [sample interval](#sampleinterval-sample-interval) should be 20 seconds or less in order to keep the granularity. The selection of the used strategy has no effect on the granularity.
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## Troubleshooting
From time to time, you may find that if you change the Item type of a persisted data point, you may experience charting or other problems. To resolve this issue, remove the old `<item_name>`.rrd file in the `${openhab_home}/userdata/persistence/rrd4j` folder or `/var/lib/openhab/persistence/rrd4j` folder for apt-get installed openHABs.