With release 1.11 "Karotte", your #card10 stops traveling back in time to 2019-01-01: sleep mode instead of power off will keep the clock ticking. Also: updated UI for the ECG app, magnetometer sensor access, etc ... https://card10.badge.events.ccc.de/en/firmwareupdate/
@card10badge ...also solves the "dead upper left key" problem.
I like the new ECG much more! Sleep mode is great, too - esp. combined with the new, more power-saving Watch++
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