Photo by Hep Svadja

Photo by Hep Svadja

Everybody loves clowning in a digital photo booth at parties and weddings, then sharing the photos online. But who wants to risk a laptop getting doused with margaritas or champagne?

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These days, cheap single-board computers make it easy to roll your own standalone photo booth that can connect to the internet with no help from your precious PC. Here’s a simple build that’s based on the Raspberry Pi mini computer and Pi Camera Module. It’s touchscreen-controlled by partygoers, and it automatically emails your photos (if you wish) and uploads them to Google Photos where anyone with the password can see and share. All the software is open source.

Our gang at WyoLum originally made a Raspberry Pi photo booth to write custom images for E Ink badges at the Open Hardware Summit in 2013, pairing the Pi with our popular AlaMode Arduino-compatible development board. The touchscreen display we used (also used in the “PiPad” tablet in Make: Volume 38) was nice, but expensive. Since then, the official Raspberry Pi Touchscreen has been released, and the new Raspberry Pi Model 3 has integrated Wi-Fi. Perfect for this project!

So we redesigned our OpenSelfie photo booth as the TouchSelfie, and tied it all together with a minimal set of mounting brackets you can 3D print (or laser-cut) to mount the whole thing on a tripod. You can also design and build your own amusing enclosure if you prefer.

Build Your Touchscreen Wi-Fi Photo Booth

First you’ll set up the Pi with the right software, then connect all the hardware. I like to use a wireless keyboard for setup, but you can use a wired keyboard, or after initial configuration, you can use SSH.

1. Configure the Pi’s operating system

If this is your first Pi project, follow Raspberry Pi’s Quick Start Guide. You’ll need to download the latest version of Raspbian, the official Linux operating system for Raspberry Pi.

Then copy the Raspbian-Jessie.img file onto your SD card (Figure A), using Apple Pi Baker (Mac) or Win32DiskImager (PC).

Figure A

Figure A

Place the SD card in your Pi, and plug the Pi into a monitor and keyboard. Plug in your camera module too (you’ll connect the touchscreen later).

Now power up the Pi, open Terminal, and run the command:
sudo raspi-config
Follow the Setup Options (Figure B) to: a) Expand Filesystem, b) Enable Camera, c) Change User Password, and d) set your Internationalization Options (locale/time zone). Now reboot the Pi.

raspi-config

Figure B

2. Install the requiredplatforms 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 --config 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/TouchSelfie

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 and create a Google account (or use your own account if you have one already). Then go to Google Photos and create a new Album. You’ll have to upload at least one photo to create it (Figure C).

Figure C

Figure C

5. Get an app-specific password

Visit your Account Security Settings 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.

Figure D

Figure D

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 Google’s Developers Console. Click on Select a project → Create a project, and name it whatever you’d like (Figure E).

Figure E

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).

Figure F

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).

Figure G

Figure G

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.

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).

Figure H

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.

RenameOpenSelfie

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/TouchSelfie/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).

Figure J

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.)

Figure K

Figure K

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. Click the “Customize” button in the upper left corner of the display (Figure L).

2016-07-07_143934

Figure L

Click the “Lookup” button beside the “albumID” label to pull up the album lookup dialog (Figure M).  It might take a few seconds for the dialog to appear.  If you are logged into your Google account, all of your albums should be queried into the selection list.  Select the album you wish to send your photos to.

Figure M

Figure M

When you see the album that you’d like, click on it in the list menu, then click the “Select” button on the top of the window (Figure N).

Figure N

Figure N

 

The album ID will automatically be put in the correct box on the customize screen. Click the “Save” button to save your new configuration (Figure O).

Figure O

Figure O

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/TouchSelfie/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 P).

Figure M

Figure P

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 these step-by-step instructions by ModMyPi.

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 Q). You can also laser-cut the camera mount from 1/16″ acrylic if you prefer that look, but the 3D-printed version seems to hold up longer.

Figure N

Figure Q

» Tabletop mount Print the files camera_mount.stl and PiTouchScreenStand.stl, found on the WyoLum GitHub. 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 R and S).

Figure O

Figure R. Step shots by Jenny Ching

Figure P

Figure S

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 T and U) or double-stick tape. Plug the camera cable into the Pi (Figure V).

Figure Q

Figure T

Figure R

Figure U

Figure S

Figure V

Fasten the tripod stand to the touchscreen with M2.5×6mm screws (Figure W) through the 2 bottom holes. Then fasten the camera mount using M2.5×10mm screws through the top holes in the stand (Figure X).

Figure T

Figure W

Figure U

Figure X

Next, press-fit the ¼-20 hex nut tightly into the stand’s base and mount it to any standard camera tripod (Figure Y).

Figure V

Figure Y

Finally, connect the Pi 3 to the wall charger or a portable battery pack using the Micro-USB cable. Your photo booth is complete!

NOTE: The portable battery must be able to output 2A at 5V to power both the touchscreen and Pi. It should also be rated at least 10,000mAh to last through a long party or event.

Strike a Pose

Your Raspberry Pi Photo Booth is ready for all manner of festivities. Here’s how to use it.

START UP

Open Terminal and run:
cd /home/pi/git/TouchSelfie/scripts
python ./photobooth_gui.py
When the photo booth launches, it will automatically take a photo and upload to Google Photos, to check that everything’s working. (If not, you probably just need to refresh the credentials — see “Troubleshooting Tips” above.)

Take and Send Photos

DSC_5042

To take a photo, tap the touchscreen anywhere on the image. The photo booth will count down from 5 and then snap the picture (Figure Z). Then it will automatically upload the photo to Google Photos on your Google account (Figure AA).

Figure W

Figure Z

Figure X

Figure AA

If you want to email the photo too, touch the white box next to the Send Email button. The touchscreen keyboard will pop up. Enter an email address, press the Close KB button to close out of the keyboard, then press Send Email to send the current photo to that address (Figure AB).

Figure Y

Figure AB

Touch the screen again to initiate the next photo. And so on.

When your party is all said and done, log into your Google account and view all your party photos in Google Photos!

Customize Messages

You can also edit the photobooth_gui.py script to display different on-screen messages during your party. For example, we uncommented line 165 (remove the # symbol from #can.create_text) and edited it to prompt users “Tap here when ready” — but this could say anything you like!

Build Your Own Enclosure

Our 3D-printed mounts are very handy, but you might prefer to build a fun enclosure to house your new Raspberry Pi photo booth! To help you design it, you can grab dimension drawings of the Touch Display and the Camera Module from the Raspberry Pi site. Jenny Ching at the Make: Labs built an awesome jumbo SLR-style enclosure for our photo booth, using ¼” plywood and round gift boxes from The Container Store.

More Fun Enhancements

Of course you’ll want to have props and masks handy, but why not take it further? You could add your own lighting effects, modify the code to take multiple pictures in a row, or even add face detection. We’re excited to see where you’ll take this project.