University of Wisconsin-Whitewater

What is a Raspberry Pi?  Low cost, ARM based computer the size of a credit card  Uses SD card for persistent storage  Developed for Linux, OpenBSD, FreeBSD platforms

(Pie for scale)

History of the Raspberry Pi  2006 – Raspberry Pi conceptualized, originally geared towards teaching children the basics of computer science  2011 – 50 Alpha boards produced and tested  2012 – Available for public sale on February 29 th in two models, A and B  2014 – As of February, over 2.5 million boards have been sold

Raspberry Pi Hardware

Hardware  700 Mhz ARM1176JZF Single-core CPU  250 Mhz Broadcom VideoCore IV GPU  Utilizes OpenGL ES 2.0  MPEG-2, VC-1, h.264/MPEG4 encoding/decoding  256 MB (Model A) and 512 MB (Model B) RAM  3 USB 2.0 ports

Computing Performance  CPU is capable of 24GFLOPs of compute power  Real world performance is equivalent to a 300Mhz Pentium 2 with better graphics

Power Consumption  Powered by 5v micro USB  1.2a (1200mA) is sufficient  Maximum power delivery is 1 amp  2 watts idle  ~3 watts under load (can spike to 5 watts)

Software

What is Linux?  “Unix-like”, meaning that it has emulated features of Unix operating systems  Open-source or “free”  Comes in many different flavors  Really just a kernel, not a complete system

Linux (cont.)  A kernel is a program that essential serves as a “middle-man” between computer hardware and applications.  Requires more programs to be considered a complete operating system  Ex: Shell, core utilities, libraries, compilers

GNU/Linux  GNU (Gnu’s not Unix) solves this problem.  Originally meant for use with the GNU Hurd kernel, GNU programs are now combined to form a complete system or distribution  Also open-source, and maintained by the Free Software Foundation

Conventional Use  Digital signage  Media centers  Emulation  Developmental tool kits  Python

Raspberry Pi as Digital Signage

Digital Signage  We utilize Chromium in kiosk mode in tandem with Unclutter, which hides cursor when not in use  Both programs set to auto-start when pi is booted  Rasbian, which is a Raspberry Pi Foundation developed Debian Linux distro is used

Emulation  Classic DOS / retro gaming  Minecraft

Management Method  We manage the Raspberry Pi with SSH (Secure Shell Hosting)  Encrypted connection that uses keys to establish a connection  Mostly anything can be done remotely  Can be done through terminal in Mac OS X or any other OS that supports SSH

What else can it do?  File, Web, and SQL server  Penetration Testing  Pfsense Router  Security Camera  VPN ..and much, much, more

QUESTIONS?

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