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perfer NTP over GPS in certain conditions
Suggestion: When GPS does not get a fix, use NTP instead of GPS as a time source.

I just ran some tests on a Raspi in my basement. A GPS receiver was plugged in bot did not get a fix. But it just received just enough data garbage to set the system clock to random dates. That lead to a very interesting behavior while trying to record data from a I2C battery sensor to influxdb.
It should already work that way if you check "NTP Server" in openplotter-settings but you must be connected to internet.

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