Editing Contiki (section)

{{Short description|Real-time operating system}}
{{About|the embedded operating system}}
{{Distinguish|Kon-Tiki}}
{{ infobox OS
| name                   = Contiki
| screenshot             = Contiki-ipv6-rpl-cooja-simulation.png
| caption                = Screenshot of an Ubuntu system showing Contiki 2.6 running on 41 nodes forming an IPv6-RPL-6LoWPAN network in the Cooja Contiki network simulator.
| developer              = [[Adam Dunkels]]
| source model           = [[Open-source software|Open source]]
| released               = {{Start date and age|2003|03|10|df=yes}}
| latest release version = 3.0
| latest release date    = {{Start date and age|2015|08|25|df=yes}}
| license                = [[BSD-3-Clause]]
| discontinued           = yes
| website                = {{URL|www.contiki-os.org}}
| repo                   = {{URL|github.com/contiki-os/contiki}}
}}
{{Infobox software
| name                   = Contiki-NG
| developer =
| latest release version = 4.9
| latest release date    = {{Start date and age|2023|06|17}}
| repo                   = {{URL|github.com/contiki-ng/contiki-ng}}
| website                = {{URL|www.contiki-ng.org}}
| discontinued           = no
}}
'''Contiki''' is an [[operating system]] for networked, memory-constrained systems with a focus on low-power wireless [[Internet of Things]] (IoT) devices. Contiki is used for systems for [[street light]]ing, sound monitoring for [[smart cities]], [[radiation monitoring]] and alarms.<ref name=primary>{{Citation |url= http://www.contiki-os.org/ |title= Contiki OS}}.</ref> It is [[open-source software]] released under the [[BSD licenses|BSD-3-Clause]] license.

Contiki was created by [[Adam Dunkels]] in 2002<ref>{{Citation |title= Contiki: Bringing IP to Sensor Networks |url= http://ercim-news.ercim.eu/en76/rd/contiki-bringing-ip-to-sensor-networks}}</ref> and has been further developed by a worldwide team of developers from Texas Instruments, Atmel, Cisco, [[ENEA (Italy)|ENEA]], [[ETH Zurich]], Redwire, [[RWTH Aachen University]], Oxford University, SAP, Sensinode, [[Swedish Institute of Computer Science]], ST Microelectronics, Zolertia, and many others.<ref>{{Citation |url= http://www.contiki-os.org/community.html |title= Contiki OS |contribution= Community}}.</ref> Contiki gained popularity because of its built in TCP/IP stack and lightweight [[preemption (computing)|preemptive scheduling]] over [[Event-driven architecture|event-driven]] [[kernel (operating system)|kernel]]<ref>{{Citation |first= Adam |last= Dunkels |contribution= Contiki – a lightweight and flexible operating system for tiny networked sensors |title= Proceedings of the 29th Annual IEEE International Conference on Local Computer Networks. |pages= 455–462 |year=2004}}.</ref> which is a very motivating feature for IoT. The name ''Contiki'' comes from [[Thor Heyerdahl]]'s famous [[Kon-Tiki]] raft.

Contiki provides multitasking and a built-in [[Internet Protocol Suite]] (TCP/IP stack), yet needs only about 10 [[kilobyte]]s of [[random-access memory]] (RAM) and 30 kilobytes of [[read-only memory]] (ROM).<ref name=primary /> A full system, including a [[graphical user interface]], needs about 30 kilobytes of RAM.<ref>[https://www.wired.com/2014/06/contiki/ Out in the Open: The Little-Known Open Source OS That Rules the Internet of Things]</ref>

A new branch has recently been created, known as [http://contiki-ng.org/ Contiki-NG]: The OS for Next Generation IoT Devices