The clock looks good to me and works ok in my environment, which is a buildroot rootfs built for the ocassion. AFAIK it should work OK on both Aura HD and Aura H2O with the stock OS.
Sadly, it isn't ready for distribution yet. Sharing the source wouldn't be useful without refactoring and I don't remember where I got the icons so I don't know if I'm allowed to bundle them with the software.
Right now it looks like this:
The clock is displayed always, and updated each minute with partial refresh on the e-ink screen.
The weather panel is displayed when we got the weather info from the internet (which happens at boot and each hour o-clock since booting. The weather panel is updated only when the information changes, which happens once or twice a day.
To avoid ghosting a full update of the e-ink screen is triggered each 15 minutes.
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