On Saturday, November 26, 2016 at 8:53:24 AM UTC-5, WindnFog wrote: > > I have a USB camera pointed at my backyard. It takes a picture every 5 > minutes, one minute before weewx does it's calculations and uploads (i.e. > picture at 04, weewx at 05 and so on.) It works fine now on a cron job > every 5 minutes, 24/7. > > I want to enhance it to just take pictures during daylight hours. My > thoughts are to put a time check in my .bat file that runs every 5 > minutes. Something like: IF (DAYLIGHT) TAKE_PICTURE ELSE FORGET_IT sort of > thinking. > > Is there a better way (from a Linux bash script, not Python) than parsing > /home/weewx/public_html/index_html to obtain these values? I'm looking for > the simplest solution. I'm hoping I can make DAYLIGHT a boolean that is > something like this: > > DAYLIGHT = ((time > Start civil twilight) AND time < (End civil twilight)) > > I could use Sunrise and Sunset instead if they are easier to obtain. > > I'd like to upload this photo to my weewx web site, and I can now except > well over half of them are taken in the dark. I want to put a .jpg there > that says something like "Next photo update at sunrise" or similar. > > Thoughts? Better ideas? > > - Paul > I don't know enough Python to help but perhaps Python has a function like the PHP date_sun_info: PHP date_sun_info <http://php.net/manual/en/function.date-sun-info.php> which, given time,lat and long, will spit out, for example:
> sunrise: 05:52:11 > > sunset: 15:41:21 > > transit: 10:46:46 > > civil_twilight_begin: 05:24:08 > > civil_twilight_end: 16:09:24 > > nautical_twilight_begin: 04:52:25 > > nautical_twilight_end: 16:41:06 > > astronomical_twilight_begin: 04:21:32 > > astronomical_twilight_end: 17:12:00 > > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
