openhab2: check if alive
As mentioned in my previous openHAB blog post: it seems to be too much to ask to have a reliable and working display in the kitchen.
Another problem I found is that the weather data occasionally does not update. Everything seems to work, no errors in the log, just no updated data. Of course this results in outdated weather info in the kitchen, and the threat that "someone" will buy a regular weather station and render my 7" Raspberry display useless.
After fighting with logs and debugging and not finding any real clue, I decided to tackle this problem from another angle, and regularly check if the weather data is up to date.
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