Igor's Blog

A while back I wrote an entry on how to get the Lenovo LT1421 USB DisplayLink monitor working on a RaspberryPi. Now I took that a bit further and created a photo frame using the Raspberry Pi model A, a USB monitor and a bunch of software and some custom scripts.

I had a few features in mind for this photo frame. Primarily I wanted it to display random photos, but I also wanted it to show time and if possible the weather. I also wanted it to be wireless (WiFi) and accessible via Windows and OS X. In addition, I wanted it to switch off at night and back on in the mornings. I was able to achieve all of these. Here's how.

This post is pretty much a follow-on from the DisplayLink monitor post from the link above, so I won't be covering OS installation or configuration on the most part, except the additional packages I've had to install and set up.
Since I wrote this article, I've gone back to revisit the photo frame design. I've also switched to using my jPhotoFrame software instead of the the Conky scripts I present in this series of articles.


Before getting into the details, here's the end result...
IMG_1577.jpg


Now the very first thing I set up was file sharing. I needed to have both AFP and SMB working, so I installed the following packages: netatalk, samba, samba-common-bin.

AFP configuration was next:
 /etc/avahi/services/afp.service
<?xml version="1.0" standalone='no'?><!--*-nxml-*-->
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
<name replace-wildcards="yes">%h</name>
<service>
<type>_afpovertcp._tcp</type>
<port>548</port>
</service>
<service>
<type>_device-info._tcp</type>
<port>0</port>
<txt-record>model=iMac</txt-record>
</service>
</service-group>


To allow guest users to connect via AFP, some extra config was required. The default parameters were replaced with the below (in the /etc/netatalk/afpd.conf file):
- -tcp -noddp -uamlist uams_dhx.so,uams_dhx2.so,uams_guest.so -nosavepassword


I also created a directory to store my photos as /photos and set up a share like so (guest access allowed):
 /etc/netatalk/AppleVolumes.default
/photos Photos allow:nobody options:usedots,upriv




Now it was a matter of restarting AFP related services and the share was available to my Mac.
 commands
sudo service netatalk restart
sudo service avahi-daemon restart

photofram1.png


Once AFP was set up, setting up Samba was next. This is considerably easier, just add a share and restart.
 /etc/samba/smb.conf
wins support = yes
server string = %h
[photos]
comment=Photos
path=/photos
browsable=Yes
writable=Yes
only guest=Yes
public=Yes



That's it for the file sharing. Next was a very important feature to set up: disabling screen blanking and power save options. For this a number of files are edited:
 /etc/kbd/config
...
BLANK_TIME=0
...
POWERDOWN_TIME=0
...


and...
 /etc/lightdm/lightdm.conf
...
[SeatDefaults]
xserver-command=X -s 0 dpms
...


While on the power options, I set up the photo frame to turn off at 22:00 every evening and then turn back on at 6:00 every morning. This was done using cron, the jobs were set up as follows:
 crontab -e
0 22 * * * xset dpms force off -display :0
0 6 * * * xset dpms force on -display :0


I measured the power consumption of this setup with the screen both on and off, this turned out to be 8.5 and 4.7 Watts. This is around $20 a year to run for me.

IMG_1578.jpg IMG_1579.jpg


That's it for this part, tune in soon to read more about setting up the scripts that do the work to make the monitor look like an actual photo frame.

Part two is posted now, check it out here: https://www.igorkromin.net/index.php/2015/04/07/raspberrypi-and-a-usb-monitor-combined-to-make-a-photo-frame-part-2/.

-i

comments powered by Disqus
Other posts you may like...
Programming, DIY, Games, Hacks, and Tech

Recent Blog Posts

Converting a CSV file containing commas in quotes to a pipe separated file using Awk and Bash

How to get Facybox gallery popup to work for images with dynamic URLs

jQuery UI Photoboxr plugin updated to version 0.2

Learn How to Add Disclaimer to All Outgoing Emails in Office 365

How to securely host your web site for free with Google Cloud and CloudFlare (part 3)

How to securely host your web site for free with Google Cloud and CloudFlare (part 2)

How to securely host your web site for free with Google Cloud and CloudFlare (part 1)

Beware of the subtle difference in date format strings between MySQL and SQLite

Postman reporting Unexpected 'N' error in response body

Adding extra shelves to the Ikea Detolf display cabinet

Recent Galleries

Space Food - Chocolate Ice Cream with Chocolate Chips

Legeod Star Wars AT-DP kit

DIY spare parts computer build with a RAIDMAX Anura case

Fake 'Lepin' brand Lego packaging

Hardwood garden bench with clear resin void filler

Fixing a 3D printer extruder that stopped heating up

Easily increase disk space in a Lenovo Ideapad 100S 14" laptop with an M.2 SSD

Making a multi-piece 3D printed solder spool holder stand

DIY indoor apartment grow light wiring

Good Friday Electronics fun Easter Bunny LED PCB Kit IBEABU-01.0

My Other Web Sites

Igor and Elise's Travels
Riverside Expressway Cam
300 George St Blogumentary

My Online Tools

UUID to OID Converter
Guru JSON-RPC Tester
Extrudifier Object Designer
Travel ┬ÁBlog

Blogs and Friends

Matt Moores Blog
Georgi's FlatPress Guide
Perplexing Permutations
The Security Sleuth
Ilia Rogatchevski
Travelling Fairy

Blog Activity

Blog Activity
Please follow me for more great content!
     
Don't show this again