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clean_install.md

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Install process for RPi4

Download and install Raspbian

Basic config

  • In sudo raspi-config do
    • Expand filesystem
    • Enable Pi Camera
    • Allocate 512Mb for the GPU
  • Update system
    • sudo apt update && sudo apt upgrade -y && sudo apt dist-upgrade -y
    • sudo rpi-update
    • sudo reboot
  • Remove Menu Bar:
    • In /etc/xdg/lxsession/LXDE-pi/autostart:
      • Comment @lxpanel line
  • Disable screensaver:
    • In /etc/lightdm/lightdm.conf:
      • Add xserver-command=X -s 0 -dpms under [Seat::*]

App Install

Requirements

  • Python3
  • Pipenv
    pip3 install --upgrade pip && pip3 install pipenv --user
  • Some libs:
sudo apt install build-essential cmake pkg-config \
      zbar-tools \
      python3-numpy python3-scipy python3-matplotlib python3-pandas python3-nose \
      default-jdk ant \
      bison \
      qt4-dev-tools libqt4-dev libqtcore4 libqtgui4 \
      v4l-utils \
      libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev
sudo apt install \
      libgtkglext1-dev
sudo apt install \
      libsdl2-dev
sudo apt-get install python-gtk2-dev
sudo apt install libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf-dev
  • uv4l:
curl http://www.linux-projects.org/listing/uv4l_repo/lrkey.asc | sudo apt-key add -

echo "deb [trusted=yes] http://www.linux-projects.org/listing/uv4l_repo/raspbian/stretch stretch main" | sudo tee -a /etc/apt/sources.list
sudo apt update 
sudo apt install uv4l uv4l-raspicam uv4l-raspicam-extras

Process

Python packages install and config

  • Clone the repo
    git clone git@gitlab.com:TrueLevelSA/swap-box.git
    cd swap-box
  • Install the python dependencies
    • pipenv install (go get a coffee)
    • pipenv run python -m pip install git+https://github.com/TrueLevelSA/eSSP
    • In ~/.kivy/config.ini (you might have to run kivy once for it to create the file):
      • add ,param=invert_y=0 to the %(name)s = probesysfs,provider=hidinput line under [input]

Zbar install

  • Move to a clean directory
    cd ~/Downloads
  • Download Zbar and extract it
wget http://sourceforge.net/projects/zbar/files/zbar/0.10/zbar-0.10.tar.bz2/download -O zbar-0.10.tar.bz2
bunzip2 zbar-0.10.tar.bz2 
tar -xvf zbar-0.10.tar
  • Configure the compilation, and compile
mkdir zbar-build && cd zbar-build
../zbar-0.10/configure --prefix=/usr/local --disable-video --without-imagemagick
make -j4
make check
  • Install the lib and configure the system to use it
sudo make install
echo "/usr/local/lib" | sudo tee -a /etc/ld.so.conf.d/zbar.conf
sudo ldconfig
  • You can remove files in the ~/Downloads folder

OpenCV install

note: Compilation fails with some other versions

  • Move to a clean directory
    cd ~/Downloads
  • Download OpenCV2 and extract it
wget https://github.com/opencv/opencv/archive/2.4.13.6.zip  
unzip 2.4.13.6.zip
  • Configure the compilation
cd opencv-2.4.13.6
mkdir build && cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE \
  -D WITH_QT=ON -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_OPENGL=ON \
  -D WITH_V4L=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_TBB=ON -Wno-dev ..
  • Compile (and get a large coffee)
    make -j4
  • or if you're using SSH, you may want to use screen if connection closes unexpectedly:
    screen make -j4
  • Install the lib and configure the system to use it
sudo make install
echo "/usr/local/lib" | sudo tee -a /etc/ld.so.conf.d/opencv.conf
sudo ldconfig
  • You can remove files in the ~/Downloads folder

QR Scanner compilation

  • Install OpenCV and Zbar as explained
  • Go to the compilation folder
    cd PATH_REPO/qr_scanner/zbar_c
  • Compile
    make

Run the application

DISPLAY=:0 KIVY_GL_BACKEND=sdl2 KIVY_WINDOW=sdl2 pipenv run python template.py develop_pi

Service install

  • Set the launch.sh script to start when the GUI is started:
    echo "@PATH_TO_REPO_FOLDER/launch.sh" | sudo tee -a /etc/xdg/lxsession/LXDE-pi/autostart