I think it would be nice to have a goto link that lists everything that does not rely on Internet either by design or thru special coding technique.
I use Zigbee2MQTT and my database is the standard one where only specific entities are recorded (only those I am using).
If I disconnect the ethernet cable, I loss the recording. I’ll try removing the internet access only to check if it still records. I’ll keep you posted
Well, if the router is still ON, the recording proceeds. If I remove the ethernet cable from my Pi, the recording stops. I guess I have to rely on my router
This is easily obtainable in the USA, too. I have used it for years on various Pi’s with success.
http://www.piface.org.uk/products/piface_clock/
One hint: Leave the Raspbian package “fake-hwclock” installed in addition to using this RTC.
Reason: The system doesn’t load the RTC script until much later in the boot process, so it will think it’s 1970 during boot, and thus will run an ‘overdue’ fsck on all your disk volumes - can take a lot of time.
fake-hwclock will at least get the system back to the time it was at shutdown, thus satisfying the fsck “how long has it been since last run?” portion of the startup scripts.
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