Make: Volume 52

another terminal window on the Pi and run:

cd /home/pi/git/TouchSele/scripts

python ./listalbums.py

Copy (or write down) the ID number of the

album that you want to use.

In the /home/pi/git/TouchSelfie/scripts folder,

open up the openselfie.conf file. Here you will be

able to enter the album ID number: albumid =

XXXXXXXXXX (Figure

L

). You can also use the

configuration dialog from the main screen of the

photo booth GUI.

Fortunately, you only have to do this once!

After this it will remember the credentials and

periodically refresh them. The cached credentials

are stored in a file called credentials.dat, so if you

delete it, you’ll have to do the web dance again, as

long as your JSON file is still there.

TROUBLESHOOTING TIPS

If you get an error that says “cannot connect to

Google Account,” it’s probably because Google

periodically invalidates the credentials. To refresh

them, try the following:

» Double-check that you’re connected to the

internet

» Remove the file credentials.dat from the

scripts file folder

» Run: cd /home/pi/git/TouchSele/

scripts

» Run: python ./photobooth_gui.py

» Allow access to Google Photos

» Re-enter credentials in Terminal window

8. CUSTOMIZE MESSAGES AND LOGOS

While you’re still in openselfie.conf (or the GUI

configuration screen) you can also create a

customized message for your event. Just edit the

text shown in italics here:

emailsubject = Subject line of your

email

emailmsg = Message that accompanies

email

photo caption = Photo caption on

Google Photos account

logopng = logo.png

albumid = XXXXXXXXXX

To customize the logo that’s stamped on each

photo, just save a new PNG file (1366×235 pixels,

with transparency if you wish) in the folder /pi/

git/TouchSelfie/scripts. Then run the photo booth

again (photobooth_gui.py) and click the Customize

button. In the pop-up window, next to “Logo File”

click the Browse button. Select your file, and click

Open. You should see a preview of your new logo.

When you’re done, click Done (Figure

M

).

9. ENABLE FULLSCREEN AND

TOUCHSCREEN KEYBOARD

Reopen the photobooth_gui.py file and remove the

# symbol from the beginning of the line #root.

attributes(“-fullscreen”,True). Now the

photo booth interface can run fullscreen on the

Touch Display.

Once you connect your Pi 3 to the touchscreen,

you won’t want to be lugging around your

USB keyboard to type commands. To install a

touchscreen keyboard on your Pi, follow the step-

by-step instructions by ModMyPi at makezine.

com/go/matchbox-keyboard.

10. MAKE THE MOUNTING BRACKETS

(OPTIONAL)

We created simple brackets you can 3D print

for standing your photo booth on a tabletop or

mounting it on a standard tripod (Figure

N

,

following page). You can also laser-cut the

camera mount from ⁄" acrylic if you prefer that

look, but the 3D-printed version seems to hold

up longer. Download the files from github.com/

wyolum/TouchSelfie/tree/master/fabricate.

» Tabletop mount Print the files camera_mount.

stl and PiTouchScreenStand.stl. This requires

using two M2.5×14mm and two M2.5×16mm

screws.

» Tripod mount Jenny Ching at Make: created

an updated version of our tripod mount

that’s a great improvement. Print the files

PiTouchScreenMount.stl and PiCameraMount.stl.

and use 10mm and 6mm M2.5 screws instead.

11. ASSEMBLE YOUR PHOTO BOOTH

Fasten the Pi 3 and the Touch Display together

using the included screws and standoffs. Connect

the touchscreen’s ribbon cable to the Pi headers

marked “Display.” Use a red jumper wire to

connect the touchscreen’s 5V pin to the Pi’s GPIO

pin 2. Use a black wire to connect touchscreen

GND to Pi GPIO pin 6 (Figures

O

and

P

).

Thread the camera’s ribbon cable through the

slot in the camera mount. Plug it into the camera,

and affix the camera to the mount with the M2

screws (Figures

Q

and

R

) or double-stick tape.

Plug the camera cable into the Pi (Figure

S

).

Fasten the tripod stand to the touchscreen

with M2.5×6mm screws (Figure

T

) through the

2 bottom holes. Then fasten the camera mount

H

I

M

TIP: If you use tape, be sure to connect the

cable first; at the Make: Labs our tape some-

times interfered with detecting the camera.

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