Contiki is an open source operating system for the Internet of Things. Contiki connects tiny low-cost, low-power microcontrollers to the Internet. the presentation explains how to install the simulator, teach the reader some concepts of contiki OS, goes through API used in platform specific examples, and most importantly explains some example(Blinking example, Light and temperature sensor web demo).

1. Contiki:Open
SourceOS for the
Internet ofThings

3. WhyChoose
Contiki?
 Contiki is an open source operating system for the
Internet ofThings.
 Contiki connects tiny low-cost, low-power
microcontrollers to the Internet

4. TheContiki
Operating
System
 Contiki is an open source operating system that
runs on tiny low-power microcontrollers and makes
it possible to develop applications that make
efficient use of the hardware while providing
standardized low-power wireless communication
for a range of hardware platforms.
 Contiki is used in numerous commercial and non-
commercial systems, such as city sound monitoring,
street lights, networked electrical power meters,
industrial monitoring, radiation monitoring,
construction site monitoring, alarm systems,
remote house monitoring, and so on.

5. GetStarted with
Contiki

6. Firstly
 Cooja makes Contiki easy to install and get started
with it.
 Download Instant Contiki
 http://sourceforge.net/projects/contiki/files/Instant
%20Contiki/
 InstallVMWare Player
 https://my.vmware.com/web/vmware/free#deskto
p_end_user_computing/vmware_player/6_0
 Register and reboot
 Start Instant Contiki
 Start Instant Contiki by running
InstantContiki2.6.vmx.Wait for the virtual Ubuntu
Linux boot up.
 Log into Instant Contiki.The password is user.

7. BootUbuntu

8. Log in

9. Step 2:StartCooja

10.  Cooja is a highly useful tool for Contiki
development as it allows developers to test their
code and systems long before running it on the
target hardware.
 Developers regularly set up new simulations both
to debug their software and to verify the behavior
of their systems.

11. Open a
terminal
window
 We will now compile and start Cooja, the Contiki
network simulator.
 Starting the terminal

12. StartCooja
 Start Cooja by
 In the terminal window, go to the Cooja directory:
 Start Cooja with the command:


13. Running
Cooja

14. CoojaUI

15. Step 3: RunContiki
in simulation

16. Creating
Simulation
 Click the File menu and click New simulation

Create New Simulation:

17. Simulation
Window
Network
window (motes)
Timeline
Window->all
communications

18. Simulation
windows
Network window -Top left
-shows all motes in the simulated
area
Timeline window - At the bottom of screen
- Shows all communication
events in the simulation over
time
- very handy for understanding
what goes on in the network
Notes window - On the top right is where we can
put notes for our simulation.
Mote output window - on the right side of the screen
- shows all serial port printouts
from all the motes.
Simulation control -window is where we start, pause,
and reload our simulation

19. Add mote to
the interface
 Before we can simulate our network, we must add
one or more motes.
 We do this via the Motes menu, where we click on
 Add motes....
 Since this is the first mote we add, we must first
create a mote type to add.
 Click Create new mote type... and select one of
the available mote types.
 For this example, we click Sky mote... to create an
emulatedTmote Sky mote type.
 Choose the hardware then install the firmware with
any functionality that you desire

20. Add mote to
the interface

21. Simulation
window

22. Step 4
RunContiki on
hardware

23. Platform
porting
 we assume you have a Zolertia Z1 mote connected to a
USB port of your PC
 Enable the Z1 in Instant Contiki, so that Instant Contiki
is able to talk to it
 cd contiki/examples/FOLDER/
 Then upload the compiled firmware to the hardware
 Then make login
 To access the burnt firmware on the device

24. Hi.c file

25. MakeFile

26. ./hi.native
 If there are not errors then some files will be
produced like .native
 filename.native

27. UploadContikitothe
hardware
Connection prob.

28. Platform in contiki

29. platforms

30. TmoteSky
platform
 TheTmote Sky platform is a wireless sensor board
from Moteiv.
 It is an MSP430-based board with an 802.15.4-
compatible CC2420 radio chip,
 a 1 megabyte external serial flash memory, and two
light sensors.
 Contiki was ported to theTmote Sky by Björn
Grönvall as part of the RUNES project.
 TheTmote Sky port was integrated into the Contiki
build system in March 2007.

31. TmoteSky
platform
 The platform-specific source code for theTmote
Sky port can be found in the directories
platform/sky and cpu/msp430 in the Contiki
source tree.
 Code for writing to the on-chip flash ROM is in the
cpu/msp430/flash.c
 Code for reading and writing to the external flash is
the file platform/sky/dev/xmem.c
 Code for reading the light sensors is in
platform/sky/dev/light.c.

32. BlinkApplication
-Code
-explanation
-Cooja runnin’
-video

33. Blink
example

34. Code detail
PROCESS ( name,
strname )
Declare a process.
PROCESS(blink_process, "Blink");
AUTOSTART_PROCESSES(&blink_process); Starting a process automatically
&blink_process
ROCESS_THREAD(name,
ev,data )
-Define the body of a process
-The process is called whenever an event
occurs in the system
-Start with the PROCESS_BEGIN() macro -
Ends with the PROCESS_END() macro.
PROCESS_EXITHANDLER(handler ) -Specify an action when a process exits.
-Comes before declaring PROCESS_BEGIN()
PROCESS_BEGIN( ) ,PROCESS_END()
-specify the beginning and the End of a
process

35. Code detail
etimer et; -This structure is used for declaring a timer.
The timer must be set with etimer_set()
before it can be used.
PROCESS_WAIT_EVENT_UNTIL(c) Wait for an event to be posted to the process,
with an extra condition.
-This macro is similar to
PROCESS_WAIT_EVENT()
in that it blocks the currently running process
until the process receives an event.
PROCESS_WAIT_EVENT_UNTIL(etimer_expir
ed(&et));
-Check if an event timer has expired.
-Parameters:
et :a pointer to the event timer.
-return true if the time expires
leds_on(LEDS_ALL); On the LEDS
leds_off(LEDS_ALL); Off the LEDs

36. LEDAPI
 Simple and important to communicate with the
user
 The platform startup code initializes the LEDs
library by calling leds_init() initializes the API
 ledv: is LED vector platform independent
 #define LEDS_GREEN 1
 #define LEDS_YELLOW 2
 #define LEDS_RED 4
 #define LEDS_ALL 7
 leds_on() takes a LEDs vector argument, ledv,
and switches on the LEDs set in the vector.
 Led_off() takes the LED in ledv and switch it off.
 leds_invert() inverts the current status of the
LEDs set in the argument ledv.

38. Youtube
Demo
 http://www.youtube.com/watch?v=9WohGp8udO
Q

39. APIs

40. ESB
platform
sensors
 button_battery_sensor - query the battery voltage
level
 sensor - query the on-board button
 pir_sensor - query the passive IR sensor (motion
detector)
 radio_sensor - query the radio signal strength
 sound_sensor - query the microphone
 temperature_sensor - query the temperature
sensor
 vib_sensor - query the vibration senso

41. Sensor
functions
 Each sensor has a set of functions for controlling it
and query it for its state. Some sensors also
generate an events when the sensors change. A
sensor must be activated before it generates events
or relevant values.
 SENSORS_ACTIVATE(Button_sensor ) ) - activate
the button sensor
 SENSORS_DEACTIVATE(sensor)
 sensor.value(0) - query the sensor for its last value
(button either pressed or not)
 sensors_event - event sent when a sensor has
changed (the data argument will referer to the
actual sensor)

42. process
PROCESS_BEGIN() -Define the beginning of a process
PROCESS_END() -Define the end of a process.
PROCESS_WAIT_EVENT()
-Wait for an event to be posted to the
process.
-blocks the currently running process until
the process receives an event.
PROCESS_WAIT_EVENT_UNTIL(c) Wait for an event to be posted to the
process, with an extra condition.
PROCESS_YIELD() Yield the currently running process.
PROCESS_YIELD_UNTIL(c) Yield the currently running process until a
condition occurs.
PROCESS_WAIT_UNTIL(c) Wait for a condition to occur.
PROCESS_EXIT() Exit the currently running process.
PROCESS_PAUSE() Yield the process for a short while.

43. LED
functions
 Basic LED functions
 leds_on() - turn LEDs on
 leds_off() - turn LEDs off
 leds_invert() - invert LEDs
 leds_blink() - blink all LEDs

44. Beeper
functions
 Implements a beep function to emit a beep sound
 Also play polyphonic tune using buzzer
 beep()- click the beeper
 beep_beep()- beep
 beep_down()- pitchbend down beep
 beep_quick() - a number of quick beeps
 beep_spinup()- pitchbend up beep

45. Timer
functions
EventTimer Callback timer Simple timer
-generates an
event when the
timer expires a
-call a function
when the timer
expires
-have to be actively
queried to check
when they have
expired
•etimer_expired()
•etimer_reset
•etimer_set()
•etimer_restart()
•ctimer_expired()
•ctimer_reset
•ctimer_set()
•ctimer_restart()
•timer_expired()
•timer_reset
•timer_set()
•timer_restart()
The Contiki kernel does not provide support for timed
events. Rather, an application that wants to use timers
needs to explicitly use the timer library.

46. Sky websense
Light and temperatur sensor web demo

47. Border
router set-up
 Having able to connect to sensors is very significant
step in IOT
 This example features a simple webserver running
on top of the IPv6 Contiki stack on Sky motes to
provide sensor values, and with a RPL border router
to bridge the sensor network to Internet.
 Server is located in :
[Contiki home]examplesipv6rpl-border-router
 Simulation in Cooja is in
 examplesipv6sky-websense

48. Steps
1. Start COOJA and load the simulation "example-
sky-websense.csc"
makeTARGET=cooja example-sky-websense.csc
2. Connect to the COOJA simulation using tunslip6:
make connect-router-cooja
3.You should now be able to browse to the nodes
using your web browser:
 Router: http://[aaaa::0212:7401:0001:0101]/
 Node 2: http://[aaaa::0212:7402:0002:0202]/

49. tunslip6
 Before being able to view the sensor readings from
the webserver,
 A serial connection to the server through the
command

50. output
 The Cooja simulator provides you with important
details about every sensor node in the network

51. Websense
code details
 Including the required libraries
 Define processes
 Opens the tcp server socket which defined in httpd.c

52. Websense
code details
 The second process is
 It does the sensing through the web in a way
A protothread that handles reading or getting the
parameters of temperature and light from sensors

53. ReviewQuestion

54. Question
• what is uIPTCP/I P ?
 provides Internet communication abilities to
Contiki
What are the applications of it?
Network enabling an embedded
microcontroller makes it possible to
control electronic consumer devices or
appliances such
 as smart meters,
 heating, air conditioning, lighting systems, grid
connected electric car chargers and even door
locks, radiation systems, ..anything 

55. Questions
 What is used for?
Contiki is designed for microcontrollers with small
amounts of memory.
 Operating system for memory-efficient networked
embedded systems and wireless sensor networks
 What is the typical size of Contiki?
A typical Contiki configuration is 2 kilobytes of
RAM and 40 kilobytes of ROM.

56. Question
 What is COOJA?
 Cooja is a simulator provided by Contiki, which
unlike most simulators also allows real hardware
platforms to be emulated

57. References
 http://www.contiki-os.org/start.html
 http://virtual-
sense.googlecode.com/git/VirtualSense/examples/rest-
example/README
 http://www.wolfe.id.au/2014/03/02/configuring-a-simple-
ipv6-network/
 http://contiki-os.blogspot.kr/
 http://people.inf.ethz.ch/mkovatsc/wiki/general:contiki:webs
erver