Sunwait

Sunwait calculates sunrise or sunset times with civil, nautical, astronomical and custom twilights.

It is intended for use in home automation with Windows Task Scheduler or cron. Use it to turn lights on *before* it gets dark! The program can wait from invocation until the event specified on the command line occurs or it can return immediately indicating if it is day or night. It’s best to schedule Sunwait to run a little before the earliest opportunity for the event to occur each year – ie dusk range is 3:30pm to 10:30pm here, so it reasonable to schedule a dusk task at 3pm and allow Sunwait to pause the task for between 30mins and 7 and a half hours. If you scheduled the task for 6pm, then your lights will come on no earlier than 6pm.

The sun’s position is calculated using time, and position – latitude and longitude should be specified on the command line.

This project is a fork from the work by Dan Risacher. The code also runs on Linux: download all files and run ‘make’

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