1. Marios Karagiannis TCS/Sensor Lab University of Geneva 12/3/2012
The Irida System
Marios Karagiannis TCS/Sensor Lab University of Geneva
12/3/2012

2. Overview Today I will be talking mainly about two things:
The Irida visualization protocol
Why?
Architecture
The Irida testbed and toolset
The testbed
Hardware
Software
Other tools
Examples
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Marios Karagiannis - The Irida System

3. Irida Visualization Protocol
Why?
The nature of WSN makes development and debugging cumbersome
Each system follows its own rules
There is no visualization standard for WSN platforms
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Marios Karagiannis - The Irida System

4. Irida Visualization Protocol
Our architecture
Irida enabled firmware for the WSN platform
Irida Control Unit (ICU)
Irida Visualization Units (IVUs)
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Marios Karagiannis - The Irida System

5. The Irida Enabled Firmware
Is hardware independent
Works side by side with the demo/research algorithm(s)
Should provide visualization data to the network ICU
The Irida enabled sensor firmware. This is the hardware independent implementation of the Irida protocol. It should work along with the actual algorithm tested or demoed and provide the necessary feedback to the next module.
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Marios Karagiannis - The Irida System

6. The Irida Control Unit (ICU)
One per network
Receives Irida packets with wired or wireless channel
Allows IVUs to register at any time and forwards the Irida packets to them
The Irida Control Unit (ICU). This module is responsible for gathering all the information from the previous module and forwarding them to registered visualization modules.
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Marios Karagiannis - The Irida System

7. The Irida Visualization Units (IVUs)
Registers with a network through the network’s ICU
Can login and logout at any time
Many IVUs can register on a single ICU
Comes in all forms and sizes (on a PC, tablet, mobile phone, projector etc.)
Can work both locally and remotely
The Irida Visualization Unit (IVU). This module registers with an ICU, receives feedback data and visualizes the network. IVUs can take many forms, depending on requirements (projection units, mobile devices, desktop computers etc.). More than on IVU can be attached to a given Irida system, providing real time feedback to local and remote locations alike.
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Marios Karagiannis - The Irida System

8. The Irida modules
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Marios Karagiannis - The Irida System

9. Example Irida packets
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Marios Karagiannis - The Irida System

10. The Irida Testbed and Toolset
The Testbed is build in the TCS lab on the 2nd floor of Battelle
The nodes rest on top of the wooden frame.
The initial installation included a grid of 16 sensors (4 x 4)
The current installation is a 49 sensors network (7 x 7)
All sensors are powered by USB
The implementation on our lab was made possible by hardware from Libelium[lib]. To test the applicability and scalability of out system, we created a grid based testbed consisting of 16 sensors in a 4x4 grid and then a grid of 49 sensors forming a 7x7 grid. For both congurations we used Waspmote sensors from Libelium[lib]. The Waspmote sensors use an ATmega1281 micro-controller at 8MHz, 8KB or SRAM, 4KB of EEPROM and 128KB of Flash memory. They also can utilize SD Cards of 2GB. They weight only 20gr which came in handy, because of the nature of the deployment. Waspmotes have the abil- ity to plug in one or two modules with Zigbee, Zigbee
PRO, Bluetooth or GPRS radios. For our testbed, we used Zigbee[zig] with a built-in antenna (txPower of 1mW and sensitivity -92dB), in order to be able to change the radio power using the firmware (the theoretical maximum range for this con guration is 500m which is too much for our purposes). This was also optimal, since our deployment was done in one room and larger antennas were non needed. All nodes were powered through the built-in USB interface. The USB interface was also used to route debugging message that controlled the visualization.
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Marios Karagiannis - The Irida System

11. The Irida Testbed and Toolset
Hardware used:
Libelium Waspmote sensors (
Zigbee modems
Atmega Mhz
SRAM: 8KB
EEPROM: 4KB
FLASH: 128KB
SD Card: 2GB (for OTA programs storage)
Weight: 20g
Accelerometers on-board
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Marios Karagiannis - The Irida System

12. The Irida Testbed and Toolset
ICU
Written in C#
Allows multiple IVUs to register
No GUI – console app
Available as open source at git-hub ( ICU/zipball/master)
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Marios Karagiannis - The Irida System

13. The Irida Testbed and Toolset
IVU
Written in C#
Uses hardware accelerated XNA technology with nice animations
Available as open source at git-hub ( IVU/zipball/master)
Is just an example of how to write an IVU. IVUs can be written in any platform and using technology as long as they can communicate with the ICU with UDP ports
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Marios Karagiannis - The Irida System

14. The Irida Testbed and Toolset
The demo setup
Irida testbed
ICU running on a PC
IVU running on another PC connected to a projector
Projector projects visualization on Irida testbed
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Marios Karagiannis - The Irida System

15. Example algorithm visualized
Using the Irida visualization and Irida testbed we implemented
Simple neighborhood discovery (arbitrary and Manhattan-distance capped)
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Marios Karagiannis - The Irida System

16. Example algorithm visualized
Routing and flooding algorithms
the bottom line of the network reacts to movement by routing a message to position 0,0 (green messages)
all the rest of the nodes react to movement by flooding the network with messages (blue messages)
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Marios Karagiannis - The Irida System

17. Other Tools Irida OTAP Control App Is in beta
Allows Over The Air Protocol queries, flashing, execution etc.
Supports Unicast, Multicast and Broadcast
Written in C#, GUI oriented
Open source ( Libelium-OTAP/zipball/master)
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Marios Karagiannis - The Irida System

18. Website http://tcslab.unige.ch/irida Description of Irida
Download full source of all Irida modules (ICU, IVU, sample firmware)
Documentation
Tutorials
Link to full paper (submitted to EGPGV ’12 – Eurographics Symposium)
(temporarily offline due to anonymous paper submission)
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Marios Karagiannis - The Irida System

19. Thank you
Questions?
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Marios Karagiannis - The Irida System