Make: Volume 52

like (Figure

E

).

While your new project is selected, click on

Credentials on the left menu, and then select the

“OAuth consent screen” tab. You’ll need to create

a “Product name shown to users,” which can be

anything you’d like (Figure

F

).

Now select the Credentials tab, select “OAuth

client ID,” and click the “Create credentials”

pulldown. Select “Other” for Application type,

name it “Installed,” and click Create (Figure

G

).

Now you’ll be able to see it in your list of

credentials for this app. Select the “Installed”

credential. Click the Download JSON button,

and a file named something like client_

secret_90328409238409238xxxxx.json should

download to your computer (Figure

H

).

Once it’s completed downloading, rename the

file OpenSelfie.json (Figure

I

), then drag and

drop it into the /home/pi/git/TouchSelfie/scripts

directory.

7. CONNECT TOUCHSELFIE TO GOOGLE

PHOTOS

If you haven’t already, connect the camera

board to the Pi. Power up the Pi, open Terminal,

and run:

cd /home/pi/git/TouchSele/scripts

python ./photobooth_gui.py

Since this is your first time running the photo

booth interface (GUI), it doesn’t yet have the

proper credentials to connect to your Google

account. Your web browser will pop up; sign in

to Google (with the same email address and

password you used to configure everything in the

previous steps), and then it will ask you whether

your Pi photo booth can manipulate your photos

(Figure

J

).

Click on Allow, and then it will display a long

string of numbers and letters. Copy this string

and paste it into the Terminal window after the

prompt that says “Enter the Authentication Code”

(Figure

K

). Hit Enter, and if all is well your photo

booth will snap a photo and upload it to the album

you have previously configured! (Or fail if you

haven’t set it yet.)

An Album ID error will pop up, indicating that

you have not yet selected an album in your Google

photos account to send your photos to. Open

NOTE: You don’t have to explicitly enable any

additional APIs; here you’re dealing with basic

authentication and authorization which is used

by every API, and the photo APIs haven’t been

explicitly added to the console.

2. INSTALL THE REQUIRED

PLATFORMS ON THE PI

Connect the Pi to your network (Wi-Fi or

Ethernet) and type the following commands:

sudo apt-get update

sudo apt-get install python-imaging

sudo apt-get install python-gdata

sudo apt-get install python-imaging-

tk

sudo pip install --upgrade google-

api-python-client

sudo apt-get install luakit

sudo update-alternatives --cong

x-www-browser

This will provide you with a menu of browsers

to pick as the default; set it to luakit.

NOTE: We’re using luakit because Raspbian’s

default browser doesn’t work with Google 2-part

authentication.

3. DOWNLOAD THE TOUCHSELFIE SCRIPTS

Still in Terminal, run:

mkdir git

cd git

git clone https://github.com/wyolum/

TouchSele

NOTE: Be sure that for the following steps

you’re continuing to use the web browser on your

Raspberry Pi / monitor setup.

4. SET UP YOUR GOOGLE PHOTOS ALBUM

Go to google.com and create a Google account

(or use your own account if you have one already).

Then go to photos.google.com and create a new

Album. You’ll have to upload at least one photo to

create it (Figure

C

).

5. GET AN APP-SPECIFIC PASSWORD

Visit myaccount.google.com/security and enable

2-Step Verification. Then return to the same

page and click on “App passwords” to generate a

16-character application password (Figure

D

).

Write it down in a safe place. You’ll use it later to

connect your photo booth to Google Photos.

NOTE: If you lose the app password or forget

it, don’t worry; you’ll just have to generate a

new one.

6. CREATE API KEYS WITH

GOOGLE DEVELOPER

While logged in to your account, visit console.

developers.google.com. Click on Select a project

→ Create a project, and name it whatever you’d

makershed.com58

PROJECTS

C

D

F

Raspberry Pi Wi-Fi Party Photo Booth

E

G

M52_056-61_RaspPhoto_F2.indd 58 6/15/16 10:17 AM