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These are some notes on how to setup various of my developments regarding OWFS on a Raspberry Pi.

I am not going to use the X server on my system, therefore let's clean it up, so future updates will consume less time and resources. See also How to uninstall X Server and Desktop Manager when running as headless server?

apt-get install deborphan
apt-get remove  --auto-remove --purge libx11-.\*
apt-get autoremove --purge libx11-.* lxde-.* raspberrypi-artwork xkb-data omxplayer penguinspuzzle sgml-base xml-core alsa-.* cifs-.* samba-.* fonts-.* desktop-* gnome-.*
sudo apt-get remove --purge $(deborphan)
sudo apt-get autoremove

Install required packages

apt-get install at libow-perl librrdtool-oo-perl libtie-ixhash-perl nginx-light owfs ow-shell php5-cgi php5-cli php5-sqlite libow-php5 rrdtool fcgiwrap
apt-get install ferm lzma nullmailer vim #for convenience

* remove 'n' in /usr/lib/perl5/OW.pm at line 68

OWST

Download phpliteadmin from https://code.google.com/p/phpliteadmin/
- In phplieadmin's configuration file set $directory = '/var/lib/owst/'

Create sqlite3 database

mkdir /var/lib/owst
chown pi.www-data /var/lib/owst
chmod 770 /var/lib/owst
sqlite3 /var/lib/owst/owst.sq3 < config/database.sql
chown pi.www-data /var/lib/owst/owst.sq3
chmod 660 /var/lib/owst/owst.sq3

Insert into the databases' table switch the One-Write Switch you want to control
- ow_type e.g. DS2413
- ow_address e.g. 3A.B36249000000
- ow_pio e.g. PIO.B
Set option “enable_dl” to “on” in /etc/php5/cli/php.ini
Dynamic loading doesn't work in my setup (using nginx and php-fastcgi, therefore libowphp.so must be loaded in the php5 configuration:
- Create /etc/php5/mods-available/owphp.ini, write the following content in it
```
; configuration for owphp module
; priority=20
extension=libowphp.so
```
- run php5enmod owphp
- reload php-fastcgi

Copy cron and sudo config files

cp config/etc.cron.d.owst /etc/cron.d/owst
cp config/etc.sudoers.d.owst /etc/sudoers.d/owst

Create log file and set permissions

touch /var/log/owst.log
chown pi.www-data /var/log/owst.log
chmod 660 /var/log/owst.log

1w Monitoring

test with 1wgetValues.pl
run 1wSensorMon.pl, you get an error that the rrd-file cannot be opened, but that's OK, check /srv/1wMonitoring/sensors.txt
execute libexec/gen_rrd_create.pl - run the output as a command
execute 1wSensorMon.pl - no error this time

activate cron job

*/5 * * * *     root    1wSensorMon.pl    2> /dev/null