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16+ Projects & Initiatives Building Ad-Hoc Wireless Mesh Networks

16+ Projects & Initiatives Building Ad-Hoc Wireless Mesh Networks
Related:  Networking / Distributed NetworkingInterneta la internet de Sabaneta

How To Set Up An Open Mesh Network in Your Neighborhood Mesh networks can share web connections throughout a neighborhood, spreading the reach of a broadband connection. They're an excellent way to improve a community’s web access, and could also serve a role in the infrastructure for the Next Net that Douglas Rushkoff envisions. Open Mesh is a company that offers mesh network solutions for businesses and communities. They provided Shareable with this guide to how to set up a mesh network in your own neighborhood. It is now easy for anyone to extend their wireless coverage throughout a hotel, apartment, office, neighborhood, village, coffee shop, shopping mall, campground, marina or just about anywhere else you need to extend wireless coverage. The magic that makes this work is the Open-Mesh mini routers (as small as the size of a pack of cards) that can spread a single internet connection across multiple rooms. Some basic terminology: Network: A group of computers that can talk to each other – in our case, wirelessly. Gateway: Repeater: Node:

HTML - Fontes: Tipos, Cores, Tamanhos e Estilos Na linguagem HTML estão disponíveis formatos envolvendo fontes: tamanho, cores, estilo, alinhamento, fundos etc, possibilitando inúmeras possibilidades de apresentação do texto. Para saber mais detalhes sobre as fontes, clique aqui. Para entender como são disponibilizadas as cores nas telas e os seus respectivos códigos RGB e hexadecimal, clique aqui. Para ver algumas tabelas de cores, em base 10 e em 16: Note-se que para aplicar uma formatação, após selecionar o texto desejado, pode-se utilizar os botões das barras de ferramentas ou clicar em "Format" e em algumas das opções como "Text style", "Text color", "Paragraph". O parâmetro COLOR contém a cor do texto. O parâmetro SIZE contém o tamanho. Quando se lida com fontes FACE contém o nome do tipo de letra Por exemplo: <font face=*></font> ou <span style="font-family: *;"></span>: É importante lembrar que essa fonte só poderá ser visualizada em outro computador se ele possuir essa fonte instalada. <font size=*></font>: Exemplo: a. c. d. e. f.

Build Your Own Internet with Mobile Mesh Networking After an earthquake crippled Haiti in 2010, killing and injuring hundreds of thousands and destroying the country’s communication networks, Paul Gardner-Stephen found himself thinking about all the cell phones that had instantly become useless. With cell towers out of commission across the country, they would be unable to operate. “If the software on the phones was right,” he says, “they would keep working for at least localized communication, handset to handset.” Gardner-Stephen, a research fellow at Flinders University in Adelaide, Australia, now leads a project that enables Android phones to do just that. This approach, known as mesh networking, is not a new idea (see “Automatic Networks”). Some communities in Washington, Brooklyn, and Detroit already have Wi-Fi-based mesh networks built on Commotion’s technology. “You could have someone taking pictures and video at a protest and sharing them immediately to the mesh,” he says.

Village Telco » Mesh Potato Mesh Potato Click for larger view The Mesh Potato is a device for providing low-cost telephony and Internet in areas where alternative access either doesn’t exist or is too expensive. The first prototypes of the Mesh Potato were built in June of 2009, almost exactly a year after the Mesh Potato concept was conceived of. The production Mesh Potato can be seen at the right. The Mesh Potato went on sale in September 2010 and can be ordered through the online store of this website. Mesh Potato Features Specifications Overview Atheros AR2317 system on a Chip (SoC)Silicon labs FXS port chipsetMIPS 4k processor 180 MHzOne 10/100Mbit LAN port8 MByte Serial Flash EEPROM16 MByte RAM Wireless LAN IEEE 802.11b/gFrequency Band : 2.4 to 2.462GHzAntenna Type : Internal Omnidirectional PCB AntennaTransmit EIRP power: 1-24 Mbit 20dBm or 36-54 Mbit 17dBm Interfaces/Ports LAN Port : 1 x RJ-45FXS Port : 1 x RJ-11 Firmware Environmental Operating Humidity: 5 to 95% CondensingOperating Temperature: -20° to +70° Physical

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How To Build A Low-Cost “Wi-Fi Mesh Network” For Emergency Communication ⚙ Co.Labs ⚙ Code + Community When tropical storms hit New York City, internet connectivity is often the first thing to go down. The next time it happens in the low-lying coastal community of Red Hook, Brooklyn, it will be a group of teenagers running something called a Wi-Fi Mesh Network that will come to the rescue--providing a model for a low-cost, community-built solution to the so-called Last Mile gaps that the massive telcos can’t (or won’t) bridge. 1Reaction A year ago, a community organization called Red Hook Initiative (RHI) had just started a pilot program for a Red Hook Wi-Fi mesh. In the hurricane’s aftermath, RHI handed the reins of the Red Hook Wi-Fi mesh project to a new group calling themselves The Digital Stewards, comprised of eight 19- to 25-year-olds. As it turns out, RHI has lots of experience getting middle school and high school kids in its youth programs to stay on for leadership positions, but the Digital Stewards is a one-of-a-kind job training experience. How To Build A Wi-Fi Mesh

ESP8266 WiFi Throwies A few years ago, someone figured out you can take an LED, a coin cell battery, and a magnet, tape them together, and throw them on every conceivable metallic surface. This was the creation of LED throwies, and the world was much worse off for its invention. With the ESP-8266 WiFi module, we have a tiny, tiny device with a WiFi radio, and just enough processing power to do something interesting. What does that mean? WiFi throwies. [Andreas Reischle] stuffed an ESP-8266 WiFi module and a lithium cell inside a weatherproof controller loaded up with magnets. The software is based on the NodeMCU firmware and features a web server and a DNS server. It’s much better than polluting the world with LEDs and lithium; this one has Hunt the Wumpus on it. Thanks [Oliver] for the tip.

45 Free Online Computer Science Courses Missed lectures or hate teachers? Or want to study computer science courses without going to university? … You can study anytime anywhere because there are number of free online computer science courses available on internet that are very interactive. Here is the list of 45 free online computer science courses that are designed by teaching experts from best universities of the world (almost the whole graduation!). 1. Programming Methodology CS106A , Stanford University Course. Complete set of course materials. 2. This course is the natural successor to Programming Methodology and covers such advanced programming topics as recursion, algorithmic analysis, and data abstraction using the C++ programming language, which is similar to both C and Java. 3. Advanced memory management features of C and C++; the differences between imperative and object-oriented paradigms. 4. The purpose of this course is to introduce you to basics of modeling, design, planning, and control of robot systems. 5. 6.

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