Python code and assets Selfiebooth Baas van Horst aan de Maas.

Connect raspberry PI camera module to board

We use BCM pin 3 (index 5) since it has an internal pull-up resistor. This means that the digital value will get pulled-up to 1 if it is floating (no connection to the ground or a 3v or 5v output). Pin 3 is floating when our switch is open, so since we have a pull-up resistor, the digital value will be 1 when the switch (push button) is open (not pressed). If the push button is pressed, we would like the value to go from 1 to 0 and raise a falling event. Therefore, the other wire needs to be attached to the ground (index 9). We use a pull-up vs a pull-down since it is less sensitive for interference.

Index 3 (BCM pin 3) and index 9 (ground) connection illustration:

Pin layout	Connection

• Raspbian (tested with Jessie lite) installation on raspberry pi. Put a ssh file in the SD card boot partition to enable ssh server (to enable remote set-up).

sudo apt-get -y update && sudo apt-get install -y git
git clone https://github.com/reinzor/selfieboot.git ~/selfiebooth

./install

The app searches for a USB stick that is inserted to the pi. If a config folder exists with a config.yaml, it will try to load this configuration. If none is found the default_config will be copied to the USB. If another config directory existed; a backup will be created.

• bottom_image: image path
• top_image: image path
• flash_image: image path
• countdown_images: list of image paths, every image takes 1 second
• screensaver_images: list of image paths
• flash_time: time in secs
• freeze_time: time in secs
• screensaver_time: time in secs
• screensaver_slide_time: time in secs
• screen_width: pixel size
• screen_height: pixel size

All specified paths are relative to the config file