Installing Raspian, OpenCV, ROS

Getting Started with your Raspberry Pi 3 and NOOBS2.0

Install Operating System Debian

• The following steps are best done on your notebook computer. If you are using Apple OS or Linux follow the instructions here: https://www.raspberrypi.org/documentation/installation/installing-images otherwise continue with the following steps:
• Dowload NOOBS image from here: https://www.raspberrypi.org/downloads/raspbian Select to download the Raspian Stretch with Desktop.
• Decompress the ZIP file.
• Burn the image with Etcher to SD Card. https://www.balena.io/etcher

Apple OS and Windows users continue from here:

• Connect Raspberry Pi to Monitor, Keyboard and Mouse. Please refer to How to energize RasPi
• Boot Raspberry Pi.
• Use English(US) and keyboard(us) settings if you are asked.

If you need pictures check here: https://www.raspberrypi.org/learning/software-guide/

Configure Raspberry Pi

• Boot RaspberryPi
• Open Raspberry Pi Configuration application through the top left menu
  • Under "Localisation" set the following:
    • Set Locale to US
    • Set Time Zone to US and Arizona
    • Set Keyboard English(US)
    • Set Wifi Country to US
  • Under "Interfaces" enable:
    • SSH
    • VNC
    • SPI
    • I2C
    • Serial
    • 1-Wire
• Let system reboot

WiFi Setup U of A

• Connect to network using UAGuest (you will need to register with phone). Start Chromium the default browser (blue ball) and connect to UA network. It might take a while until the login screen appears after your tried to connect to any website.
• Start Chromium and register your Google account in Chromium as one of the user accounts. You will need to add a new user in Chromium. Use your email.arizona.edu google account so you can access all the files on the course website.

Update and Upgrade Operating System

Open Terminal/Command Line Interface and entering following commands (wait until pi@raspberrypi ~ $ reappears between each command)

• sudo apt-get update (20s)
• sudo apt-get upgrade, accept all suggested default additions and changes (10mins)
• sudo apt-get -y dist-upgrade
• sudo apt-get -y autoremove
• reboot

Remove not needed software (Optional)

• sudo apt-get purge wolfram-engine
• sudo apt-get clean
• sudo apt-get autoremove

Install useful Tools (Optional)

• Install VNC viewer on your personal computer: https://www.realvnc.com/download/viewer/
• Discover your RasPi's IP by double clicking on VNC icon on top right corner of RasPi display
• Check here for pictures https://www.realvnc.com/docs/raspberry-pi.html
• You should be able to connect to your RasPi using the VNCviewer from your desktop or your notebook computer.

Setup OpenCV (Computer Vision)

• Open Shell/Terminal
• If necessary set date and time sudo date -s “Tue Nov 1 10:38:00 MST 2016”
  • In addition install following libraries and modules
  • sudo apt-get install libhdf5-dev libhdf5-serial-dev
  • sudo apt-get install libqtwebkit4 libqt4-test
  • sudo apt-get install libjasper1
  • sudo apt-get --yes --force-yes install libatlas-base-dev
  • wget https://bootstrap.pypa.io/get-pip.py
  • sudo python3 get-pip.py
  • sudo pip3 install opencv-contrib-python
  • sudo pip3 install imutils
  • Now you can test some example programs (in terminal/command line interface). First you need to run:
    • python3
    • import cv2
      • If this does not complete successfully you did not complete the installation script above.
    • cv2.__version__
    • should result in 3. something
    • exit()
  • download the sample files for opencv from here onto your raspberry py home directory. Extract the files.
  • Plug in USB camera
  • cd [to the folder where you extracted the files]
  • python3 facedetect.py
  • If your camera is not plugged in it will load the "Lena" test image. This image is being phased out and is not acceptable for scientific publication anymore as it is a Playboy centerfold image and supports sexism at work
  • Press "esc" key to exit the camera

Setup ROS (optional)

• http://wiki.ros.org/ROSberryPi/Installing%20ROS%20Kinetic%20on%20the%20Raspberry%20Pi

In above instructions replace

ros_comm WITH robot

kinetic WITH melodic

Skip section with unavailable dependencies.

You might want to try some of the tutorials

http://wiki.ros.org/ROS/Tutorials

Setup Programming Environment Visual Studio Code

Follow these instructions https://pimylifeup.com/raspberry-pi-visual-studio-code/

Alternative: Setup Eclipse Programming Environment

In terminal/command line interface:

Obtain the eclipse IDE

• sudo apt-get install eclipse

Run eclipse

• sudo eclipse

Install PyDev as Extension into Eclipse. This will allow you to create python programs in Eclipse.

• check version of eclipse
• check which version of PyDev you need: http://www.pydev.org/manual_101_install.html
• find and download the correct PyDev archive on the RasPi
• Unzip the downloaded archive
• eclipse -> Help -> Install new software
• deselect "Group items by category"
• Add -> Local -> select the folder into which you unzipped PyDev
• select PyDev and PyDev Developer Tools
• let it complete and let eclipse restart

Configure Python Interpreter with advanced option, create one for python 2 and one for python 3

• Window->Preference-PyDev->Interpreters -> Advanced Auto Config
• Select python2 and create setting called python2. You can rename the config by double clicking name.
• Repeat above Advanced Auto Config for python3.