5. 1. Embedded systems
2. Embedded systems OS(Contiki,Tiny OS,RIOT, …)
3. Communication technologies
4. Sensor technologies
5. Real time systems
6. Smart things and technologies
7. Machine-to-Machine Communications
8. Big Data Analytics
6. 1. Bluetooth
2. Zigbee
3. Z-Wave
4. NFC (Near-Field Communication)
5. RFID
6. WiFi – IEEE 802.15.11
7. IEEE 802.15.4 , 4e
8. 2G/3G/LTE
9. Wibro/MobileWiMax
10. PLC (Power Line Communication)
11. Ethernet
12. What else?
7. • IPv4(232
) contains 4,294,967,296
• IPv6(128bit address space)
• 2128
possible addresses
=340,282,366,920,938,463,463,374,607,431,76
8,211,456 addresses(3.4 x 1038
or 340
undecillion)
• 6.65 x 1023
addresses for every square meter of
the Earth’s surface
• 128 bits to allow flexibility in creating a multi-
level, hierarchical, routing infrastructure
8. Contiki is an:
open source
highly portable
multi-tasking operating system
For:
Memory efficient
Networked embedded systems
And wireless sensor networks.
9. Contiki has been used in a variety of
projects from road tunnel fire
monitoring, intrusion detection, water
monitoring to surveillance networks.
10. TCP/IP communication with uIP stack
Loadable modules
Event-driven kernel
Protothreads
Protocol-independent radio network with the Rime
stack
Cross-layer network simulation with Cooja
Networked shell
Memory efficient flash-based Coffee file system
Software-based power profiling
11. Coffee is a very simple, relatively small and
easy to use file system that you are most
likely going to be very familiar with if you
have done any C file access in the past.The
notion is the same as on a normal PC: you
open a file, read and write to it and close it.
Contiki will take care of the underlying flash
memory, giving you more time to focus on
the real issues.
12.
13. Power consumption is the most important
metric in wireless sensor networks because
reduced power consumption leads to
increased network lifetime.
Energy has been reduced by using more
efficient protocols for topology
management, routing, and radio medium
access.
14. The highest priority of these methods is to
turn off the radio as much as possible
because radio listening is generally the most
power-consuming task in sensor networks.
Other methods: required tedious setups of
oscilloscope circuits, capacitors, or on-board
instrumentation.
15. Software-based power profiling has enabled
non-intrusive and scalable power profiling in
real sensor networks.
The technique is based on measuring the
time that each component is active and
multiplying that time by the component's
power consumption.
16. IEEE 802.15.4/ZigBee compliant RF
transceiver
2.4 to 2.4835 GHz, a globally compatible ISM
band
• 250 kbps data rate
• Integrated onboard antenna
• 8MHzTI MSP430 microcontroller with 10kB
RAM
17. Low current consumption
1MB external flash for data logging
Programming and data collection via USB
Optional sensor suite including integrated
light, temperature and humidity sensor
27. Cooja is an emulator
According to different sources, an emulator
is:
a hardware or software system that enables one
computer system (called the host) to behave like
another computer system (called the guest): e.g.
Cooja enabling your laptop to behave like a Z1
mote.
28. Cooja is an emulator
According to different sources, an emulator
is:
a system that typically enables the host system to
run software or use peripheral devices designed for
the guest system: e.g. Cooja enabling your laptop
to run the RPL protocol, LIBP and/or other IoT
protocols of interest
29. Cooja is not a simulator
According to different sources, a simulator is:
a hardware or software that that enables one computer
system (called the host) to behave like another
computer system (called the guest), but is implemented
in an entirely different way : e.g. A flight simulator gives
you the feeling of flying an airplane, but you are
completely disconnected from the reality of flying the
plane, and you can bend or break those rules as you see
fit. e.g. Fly an Airbus A380 upside down between
London and Sydney without breaking it.
30. Cooja is a Contiki network emulator
An extensible Java-based simulator capable of emulating
Tmote Sky (and other) nodes
The code to be executed by the node is the exact same
firmware you may upload to physical nodes
Allows large and small networks of motes to be simulated
Motes can be emulated at the hardware level
Slower but allows for precise inspection of system
behavior
Motes can also be emulated at a less detailed level
Faster and allows simulation of larger networks
31. Cooja is a highly useful tool for Contiki development
It allows developers to test their code and systems
long before running it on the target hardware
Developers regularly set up new simulations to
debug their software
to verify the behavior of their systems
32. 1.start Cooja
2.Create a new simualtion to run Contiki in
simulation and wait for Cooja to start and
compile itself
3.Set simulation options
4.Create a new mote type
5.Add motes to the simulation
34. INTERNET OF THINGS
Roadmap to a Connected World
http://web.mit.edu/professional/digital-programs/courses/IoT
The Contiki wiki page
https://github.com/contiki-os/contiki/wiki
35. Joakim Eriksson, “Demo Abstract: Accurate Power Profiling of
Sensornets with the COOJAIMSPSim Simulator”, IEEE, 2009.
Jose, Guiterrez , “IEEE Std 802.15.4 Enabling Pervasive
Wireless Sensor Networks”, Embedded Systems &
Communication, Eaton Corporation, 2005.
IEEE standard for Local and Metropolitan area networks,
802.15.4, 2011.
IEEE 802.15.4e, MAC sublayer Amendant, 2016.
Https://github.com/contiki-os/contiki.
