Kiltispiikki uses

• platform independent python package Kivy for the GUI
• sqlite3 database
• Google drive for automatic back ups

Install kivy following the kivy installation guide (pick right platform)

https://kivy.org/docs/installation/installation.html

install kivy dependencies on RasPi

$ sudo apt-get update
$ sudo apt-get install libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf-dev \
   pkg-config libgl1-mesa-dev libgles2-mesa-dev \
      python-setuptools libgstreamer1.0-dev git-core \
	     gstreamer1.0-plugins-{bad,base,good,ugly} \
		    gstreamer1.0-{omx,alsa} python-dev cython

install kivy (RasPi only found old package versions of cython so had to rename the old version first)

$ sudo pip install git+https://github.com/kivy/kivy.git@master

Kiltispiikki uses google play api to make backups to google drive. Install google-api with

$ pip install --upgrade google-api-python-client

Go to your home folder and clone the git repo

$ git clone https://github.com/miikama/kiltispiikki.git

Before first run on a new user go to the folder piikki/drive_init/ and run (not necessarily required if not on rasperry)

$ python drive_auth_init.py --noauth-local-webserver

This starts the authentication flow for the google drive, it should direct the user to browser to login in to a google account. Kiltispiikki is currently configured for hupimestari account. A new account will require for the user to go to google developers console and create a new oauth2 token and download their own client_secret file to the folder drive_init/

On a computer you are now set up. On Rasperry continue to the next phase.

on rasperry the user needs to be added to the video user group to be able to open up a GUI and give access to input

$ sudo usermod -a -G video username
$ sudo chmod /dev/input/event*
$ sudo apt-get install xclip

The touch events are mirrored on rasperry. The first working way to fix this is to modify kivy source code.

 $ sudo vim /usr/local/lib/python2.7/dist-packages/kivy/input/providers/hidinput.py

find functions assign_coord AND assign_rel_coord and before the first if sentence inside the function add line

p = cx; cx = cy; cy = p

The touch screen used is waveshare 10.1" lcd touch screen

https://www.waveshare.com/wiki/10.1inch_HDMI_LCD

Copy the driver "LCD-show" to the rasperry. Your home folder is fine. extract the archive with

$ tar xvf "filename"

the go to the folder and run the correct driver

$ sudo ./LCD101-"something"

the touch screen should now start

Allows filtering and presents customer his most bought items, all buys are stored in sqlite database

allows adding, deleting or modifying items

allows modifying customer accounts. Backing up/retrieving the customer data to/from google drive