take care of device time drift

fwmone released this 31 Jan 07:10

95b38da

Changed

take care of device time drift of up to 30 minutes, e. g. device is set to wake up at 6am but wakes at 5:47 (seems to be a firmware bug) - do not set the time to 6am again but to the next time slot (e. g. 18:00 when wake_up_hours is "6,18").
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