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Offline networking: Difference between revisions
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Added image of Freifunk network, Berlin
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SubNodes, by Berlin-based artist Sarah Grant, employs popular ''Raspberry Pi'' minicomputers as wireless access points, serving a website and chat application <ref>http://subnodes.org/</ref>. Smartphones, for instance, can be used to connect to the access point, from which is served a website, alongside simple chat application. The project provides complete instructions requiring minimal prior knowledge for deploying a 'SubNode'. Such 'SubNodes' could be employed inside weatherproof plastic cases, like tupperware or a plastic lunchbox, powered off solar power bank or voltage-converted car battery, and used to provide valuable information without need for the Internet. SubNodes can also be used in a mesh networking capacity, connecting to other compatible nodes. | SubNodes, by Berlin-based artist Sarah Grant, employs popular ''Raspberry Pi'' minicomputers as wireless access points, serving a website and chat application <ref>http://subnodes.org/</ref>. Smartphones, for instance, can be used to connect to the access point, from which is served a website, alongside simple chat application. The project provides complete instructions requiring minimal prior knowledge for deploying a 'SubNode'. Such 'SubNodes' could be employed inside weatherproof plastic cases, like tupperware or a plastic lunchbox, powered off solar power bank or voltage-converted car battery, and used to provide valuable information without need for the Internet. SubNodes can also be used in a mesh networking capacity, connecting to other compatible nodes. | ||
== WiFi mesh networks == | |||
[[File:Berliner freifunk netz 03-01-2007.jpg|thumb|Image showing connections between nodes of the Freifunk network in Berlin in 2007.]] | |||
Mesh networks are computer networks that have in-built node redundancy, meaning that no central node is critical to the distribution of information across the network. Routing algorithms ensure that if a node is unavailable along the route, another optimised route is chosen. Mesh networks are in wide use throughout military and disaster response applications, but can also be deployed and managed by civilians with low cost equipment. | |||
=== Freifunk === | |||
Among the most well known and successful WiFi mesh networks in the world is Freifunk. Established in 2003 in Germany, one of the primary goals of the project is to build a large-scale free wireless Wi-Fi network that is decentralized, free of discrimination (net neutrality), owned by those who run it, and to support local communication independent of the public Internet<ref>https://freifunk.net/en/</ref>. Comprising over 41,000 wireless access points run by civilians, the Freifunk firmware is based atop OpenWrt and runs the ''batman-adv'' (B.A.T.M.A.N) mesh networking protocol, which is actively developed by Freifunk activists<ref>https://openwrt.org/docs/guide-user/network/wifi/mesh/batman</ref>. | |||
== Linkdump == | == Linkdump == | ||