ShabbatCron

Schedules script executions relative to Shabbat and Hag in and out times.

• start.sh is executed at Shabbat/Hag start.
• end.sh is executed at Shabbat/Hag end.

Jewish Holidays are taken into account.

Times are within close range of chabbad.org

Installation

Project

1. Download the files to /home/pi/ShabbatCron/
2. Run pip install -r requirements.txt

It is suggested to use a python virtual environment

Service

sudo ln -s /home/pi/ShabbatCron/shabbat-cron.service /etc/systemd/system/shabbat-cron.service
sudo systemctl enable shabbat-cron.service

The service will automatically start at system boot.

• To manually start: sudo service shabbat-cron start
• To manually stop: sudo service shabbat-cron stop

Settings

1. Adjust your physical location by adding an entry to settings.ASTRAL_LOCATION_INFO, and setting settings.LOCATION
2. Adjust the START_DELTA and END_DELTA variables to controls how many minutes before/after Shabbat/Hag the relay should be activated/deactivated
3. Adjust the start.sh and stop.sh scripts with your specific logic

Note

/home/pi/ShabbatCron/ is assumed as the projet directory, and /usr/bin/python3 for python.
Adjust shabbat-cron.service for your specific setup.

Acknowledgments

• Thanks to Chabad's wonderful site explaining Shabbat end times: Zmanim-Calculations
• Many thanks to Darryl Bond for his fantastic relay driver: github.com/darrylb123/usbrelay
  Darryl's usbrelay is used in the sample bash scripts to turn relays on and off.
  USB Relay Driver Installation:

  sudo apt-get install usbrelay
  sudo nano /etc/udev/rules.d/50-dct-tech-usb-relay-2.rules
      SUBSYSTEM=="usb", ATTR{idVendor}=="16c0",ATTR{idProduct}=="05df", MODE="0666"
      KERNEL=="hidraw*", ATTRS{busnum}=="1", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="05df", MODE="0666"
  #Test
  sudo usbrelay X0L7N_1=1
  sudo usbrelay X0L7N_2=1