Mostly the high but sometimes also the low value for the corresponding device are empty at least once a day. As can be seen from the screenshot below, there is nothing between the device name and the date it was last updated. There should be the high value (as a string) there. The value of the device is -999 = unknown. I do see that in the XML file "<dayHi>-</dayHi>" so that explains that part. Is there a way to configure the plugin so that it uses the last known/retrieved value. When a device was not updated because no value was available then the last modified date/time should not be changed, of course. That allows me to monitor if a device has consistent problems, i.e. isn't being updated anymore at all or if it was just a temporary glitch.

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