1. MOBILE
RASPBERRY PI
presented by Giorgio Natili
MOBILE TEA #5
ROME, 10 JULY 2013
(WAT? It's raining again?!)

2. About me
e-mail: g.natili@gnstudio.com
twitter: @giorgionatili
blog: webplatform.io (coming soon!)
community: codeinvaders.net

3. Agenda
• What is WebRTC and what we can do with it
• What is libjingle
• Explore the libjingle GYP files
• Make a build for iOS
• Demo

4. WHAT IS WEBRTC

5. What is WebRTC
• Accordingly to google WebRTC is a new way yo do real time
communication on the web without using any plugin.
• WebRTC is a free, open project that enables web browsers with
Real-Time Communications (RTC) capabilities via simple
Javascript APIs.
• WebRTC API are available in Chrome 24+, Firefox 22+ and
Opera 12+.
• Don't confuse WebRTC API and the the <device> API.

6. Internet Explorer
What's about our good friend IE?
• It's unclear how and when the support will be available
• So far you can use ChromeFrame to support WebRTC
(more info about the ChromeFrame extension are
available on the official web page of the project
developers.google.com/chrome/chrome-frame/)
• You guess? Microsoft is working on its own standard :)

7. Model a / Model b
- The ethernet port is available only on model b
- The model a has only 256mb of memory (SDRAM)
- The model b has a dual USB connector
- All the other features are the same in model a and b
- A detalid comparison is available on element14

8. Model b
components

9. Didactical Usage
- General computer usage
- Programming (python, java, etc.)
- Understand hardware components
- Linux and Bash

10. Practical Usages
- Media Center (HDMI)
- Electronics (micro) controller
- Surveillance systems (i.e. camera module)
- Arcade Game Coffee Table using MAME
- Supercomputers (at the University of Southampton linked up 64
Raspberry Pis)

11. Performances
- At the heart of the Raspberry Pi is the same processor you
would have found in the iPhone 3G and the Kindle 2
- There is a standard RCA-type jack that provides composite
NTSC or PAL video signals in addition to the HDMI output
- There’s no hard drive on the Pi, everything is stored on an
SD Card

12. Where and How to
Get It?
- Premier Farnell / Element 14
- RS Components
- Egoman Technology Corp
- Robot Italy
Then you have to be really patient, wait and pray it will arrive in time...

14. Explore the Board

15. The processor

22. RASPBERRY
PERIPHERALS

23. What You Can
Connect
- You can connect peripherals using the pins on the board
- General Purpose Input and Output (GPIO)
- P2 and P3 headers
- Camera Serial Interface (CSI)
- Display Serial Interface (DSI)

24. Select always the
proper
peripherals!
http://elinux.org/RPi_VerifiedPer

25. Internal Power
Hub

26. Battery Pack

27. Keyboard &
Touchpad Mouse

28. Choose the Right
Distribution

29. Raspbian
The “officially recommended” official distribution from the
Foundation, based on Debian

30. Adafruit
It is a Raspbian-based distribution that includes tools and drivers useful
for teaching electronics

31. Xbian
It is a distribution based on Raspbian for users who want to use the
Raspberry Pi as a media center (see also OpenELEC and Raspbmc)

32. Arch Linux
It is a distribution specifically targets ARM-bssed computers so it's the
early adopted Raspberry Pi OS

33. Prepare the SD
Card

34. OS Disk Image
- The operating system is distributed as a disk image
- It is a bit-for-bit representation of how the data should be
written to the SD card

35. OS X
- Open the terminal utility
- df -h, insert the SD card and then type it again
- Unmount the card (diskutil unmount /dev/ disk3s1)
- Figure out the raw device name (replace disk with risk and
leave off the s1)
- Use the dd utility to write byte per byte the disk image

36. Windows
- Download the Win32DiskImager
(https://launchpad.net/win32-image-writer)
- Insert the SD card
- Open Win32DiskImager and select the OS image

37. Run the
Raspberry pi

38. Step by Step
- Plug the SD card into the socket
- Plugin an USB keyboard and mouse
- Plug the HDMI output into your TV or monitor
- Plugin the power supply
- Cross the fingers and have fun!!!

39. Trouble Shooting
- Check the SD card is correctly docked
- Chet you are using the correct type of SD card
- Check if the card is write protect enabled

40. The Config Screen
1/2
- Expand rootfs, enlarge the filesytem in order to use the
whole SD card
- Overscan, enable it if the text run off the screen on an high
definition monitor
- Keyboard, setup the keyboard style (the default is UK)
- Password, chose something stronger than raspberry

41. - Change Locale
The Config Screen
2/2
- Memory split, change the amount of memory used by the
CPU and the GPU
- Overclock, speed up the processor speed to 1000Mhz
- Set theTimezone
- SSH, switch on/off the secure shell server that allows you
to run headless
- Desktop behavior, setting up no you run it as CLI Linux

42. (command line!)
Don't update the
OS the first time
you run the
device!!!

43. Pre Installed
Software
- Midori browser (optionally NetSurf or Dillo)
- Omxplayer
- Leafpad and Nano
- Bourne Again Shell (BASH!)
- apt-get (e.g. sudo apt-get install scrot)