Schedules Using Sunrise and Sunset
Schedule blocks can start and end relative to sunrise or sunset, allowing them to automatically shift with seasonal changes.
A schedule block's Start and End points can be set at fixed times on the clock, or they can be set at some fixed offset from sunrise or sunset. If either point is set relative to sunrise or sunset, the SMART uses its location, date, and time zone information to calculate when sunset and sunrise occur on each day in order to time its schedule.
As a common example, we can program a schedule to record overnight from 30 minutes before sunset to 30 minutes after sunrise.
Start: Sunset - 00:30
Duty: Always
End: Sunrise + 00:30
Start: Offset from Sunset
Sunset means the Start point is defined relative to the time of sunset on a given day. The negative sign, -, means the block starts earlier than sunset, and the offset, 00:30, means it starts 30 minutes prior to sunset.
If you want the schedule block to start exactly at sunset, you should set the offset to 00:00. The value of the positive or negative sign does not matter in that case.
Duty Cycle: Always
Setting Duty to Always means the schedule block runs from the Start to the End with no pauses in between.
When Always is selected, the On and Off commands are not used.
End: Offset from Sunrise
The structure of the End command is the same as for the Start command. Selecting Sunrise means we define the End for this schedule block relative to the time of sunrise on each day. The positive sign, +, means we want to specify a time after sunrise occurs. 00:30 specifies 30 minutes after sunrise.
