Selfiebooth Baas van Horst aan de Maas

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

Hardware setup

1. Camera module

Connect raspberry PI camera module to board

2. GPIO setup for button

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

Software setup

1. Prepare raspberry pi image

• 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).

2. Clone this repository

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

3. Run the install script

./install

Configuration file

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.

Config file parameters

• 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