Setting up wifi

  1. Open terminal and ssh into your pi or connect your pi to a monitor and keyboard.
  2. Open the /etc/network/interfaces file
        sudo nano /etc/network/interfaces
  3. Change the file to the following::
     auto lo
    iface lo inet loopback
    iface eth0 inet dhcp
    allow-hotplug wlan0
    iface wlan0 inet manual
    wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
    iface school inet static
    address <school address>
    gateway <school gateway>
    netmask <school netmask>
    iface home inet static
    address <home address>
    gateway <home gateway>
    netmask <home netmask>
  5. Open the wpa_supplicant.conffile
    sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
  6. Add the following:
        ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
        psk="SCHOOLS PASSWORD"
        ssid="HOME NETWORK NAME"
        psk="HOME PASSWORD"
  8. Avahi comes installed on the Raspberry Pi. But update before you do anything:
    sudo apt-get update 
  9. "Zeroconf is 'a set of techniques that automatically creates a usable Internet Protocol (IP) network without manual operator intervention or special configuration servers.'

    Avahi is an implementation of zeroconf which 'ships with most Linux and *BSD distributions', but not the Pi's Debian distro. Zeroconf will be familiar to Apple users as Bonjour, and is pretty clever tech which means that things Just Work when sharing stuff across computers on a network. In this context, it means that once [you've] set it up on the Pi, [you'll] be able to address it as:

    regardless of what IP address it's been assigned on your local network. This is handy if its IP is likely to change regularly, and even means we'll continue to be able to address it if we're on a different network (say, shuffling between home & work networks)."

    Install avahi with the following commands on the Pi:
    sudo apt-get install avahi-daemon
  10. Type:
    sudo insserv avahi-daemon
  11. Create a config file for Avahi at /etc/avahi/services/multiple.service. I did this with the following command:
    sudo nano /etc/avahi/services/multiple.service
  12. The contents of this file should be something like the following, courtesy of aXon on the Rasperry Pi forums:
    <?xml version="1.0" standalone='no'?>
    <!DOCTYPE service-group SYSTEM "avahi-service.dtd">
            <name replace-wildcards="yes">%h</name>
  14. Restart Avahi to apply the new configuration
    sudo /etc/init.d/avahi-daemon restart
  15. The Pi should now be addressable from other machines as raspberrypi.local, for example:
    ssh pi@raspberrypi.local
  16. Create a config file for Avahi You need to open the config file
        sudo nano /etc/avahi/avahi-daemon.conf
  17. Navigate to where you see [server]. Uncomment #host-name=foo and set the host-name to something that makes sense
  18. Press CTRL+X, Y and RETURN
  19. Shutdown
  20. Install Wireless module and restart.
  21. I'm using IP Scanner to find my pi. If all went well I should find li pi, an IP and a mac address.
  22. You should be able to now log in like this:
       ssh pi@liz-pi.local
  23. If you try to log in and see:
    offending_key.png Do this:

      # perl -pi -e 's/\Q$_// if ($. == 6);' ~/.ssh/known_hosts

    Change the number to the line number shown in the message

Transfering Files

You can use SFTP to transfer content to the Pi.

Download FileZilla onto your computer as your SFTP client.

  1. Open the application
  2. Click File > Site Manager
  3. In the General tab fill out the relevant connection details:
    • Host:ip of your pi
    • Protocol: select SFTP-SSH File Transfer Protocol
    • Logon Type: set to normal
    • User: specify the user (pi)
    • Password: Specify the current password for the chosen account
  4. Click connect
  5. Navigate to /var/www
  6. Drag and drop any ontent into the target pi directory in FileZilla
  7. Click Disconnect on the toolbar to end the session

By default the size is 1080p HD at 1920x1080 pixels
  •  raspivid -o smallvid.h264 -t 15000 -w 1024 -h 768
    This is a 15 second video with a size of 1024x769
  • To atually see your raw video you have to wrap the stream in an MPEG layer 4 container. To do this, download and install MP4BOX:
    sudo apt-get install -y gpac
  • Then:
    MP4Box -fps 30 -add smallvid.h264 smallvid.mp4
  • To view the movie:
    omxplayer smallvid.mp4
    For more video info see

  • Setting Up a Time-Lapse Webcam

    1. Install fswebcam
      sudo apt-get install fswebcam
    2. fswebcam -r 1024 x 768 -d /dev/video0 imagename.jpg
      The r switch specifies the dimensions the d switch the output directory
    3. Create a configuration file for fswebcam to save your defaults
      cd ...
      sudo nano .fswebcam.conf
    4. Add these lines and customize:
      device /dev/video0
          input 0
          loop 15
          skip 20
          resolution 320x240
          set brightness=60%
          set contrast=13%
          title "webcam"
          timestamp "%d-%m-%Y %H:%M;%S (%Z)"
          jpeg 95
          save /home/pi/webcam/viewcam.jpg
          palette MJPEG
      Save file
    5. To start the fswebcam using the config file
      fswebcam -c ~/.fswebcam.conf
    6. To stop the process:
      pkill fswebcam
    7. To create a repeating operating system level job that snaps a picture every minute:
      sudo nano
    8. Enter the following:
      filename=$(date +"%m-%d-%y||%H%M%S")
      fswebcam -r 356x292 -d /dev/video0 $filename.jpg
          cp $filename.jpg /home/pi/webcam
    9. Make your shell script executable
      sudo chmod +x
    10. Start the crontab editor for the pi user:
      crontab -e
    11. When the file opens, move the curso r to the bottom. By entering ths line the pi will run the script every minute:
      */1 * * * * /home/pi/