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control software for Janet Zweig's public art piece to be installed at the new San Diego public library Mission Hill/Hillcrest branch

sudo pip install pyyamlsudo pip install numpy

there is an 8GB external thumb drive automatically mounted at boot to/mnt/backup. all of the automount settings are stored in the/etc/fstab file.more info here

the scriptmain.py is set to be run automatically as a systemd service. the relevant systemd service file is located at/lib/systemd/system/scroll.service. note that in order for the service to run successfully relative file paths cannot be used. all file paths must be absolute. theget_basepath() function in themain.py module is useful for setting the correct filepaths.more info on systemd services here

currently using theRasPi DS1307 RTC-I2C HAT from Nation Electronics

instructions from their website:runsudo raspi-config and enable I2C in "Advanced Options", then reboot

install I2C-tools:

sudo apt-get install i2c-tools

check that RTC shows up on I2C channel 68:

sudo i2cdetect -y 1

adddtoverlay=i2c-rtc,ds1307 to the bottom of /boot/config.txt:

sudo nano /boot/config.txt

addrtc-ds1307 to /etc/modules:

sudo nano /etc/modules

comment out 3 lines from /lib/udev/hwclock-set:

sudo nano /lib/udev/hwclock-set# comment out these lines:if [ -e /run/systemd/system ] ; then    exit 0fi

reboot, and if the Pi is connected to the internet the current date and time should be set automatically. verify this with:

sudo hwclock -r

if not connected to the internet, first the system date must be set, and then that date must be written to the hwclock:

sudo date -s "6 OCT 2015 18:00:00"sudo hwclock -w