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Quintana Winter of Code

A couple of days visit to Quintana, that ended up being two weeks: Gui joined Jesi and Nico on a “micro-sprint”, to help expand the local network, and at the same time do some “pair development” on project, to solve several longstanding firmware tasks and work on new ideas, intending to increase the momentum and get the ball rolling. Nico and Jesi drove to Buenos Aires to do some collective shopping: local funds collects were done in QuintanaLibre, AnisacateLibre, […]

Playing with ath9k Spectral Scan

I had long been wanting to get my hands dirty with the recently released ath9k spectral scan code and proof-of-concept graph tool, even more after the BattleMesh v6 where I had the invaluable opportunity of not only meeting the author (the ever smiling Simon Wunderlich), but also getting some spectral scan details patiently explained by Felix Fietkau. Furthermore, Laurent Guerby from came up with a pretty interesting idea: fetch samples once a day or so from each node, collecting […]

Se hace camino al andar…

Muy buenos días a todos nuestros lectores desde esta cálida Colombia. Este artículo será el primero de cinco que narrarán las experiencias de quien les escribe en su viaje de 23 días por las regiones de Cundinamarca y Tolima, en el frondoso país de Colombia. En esta oportunidad se incluyen las actividades entre el 19 y el 25 de abril: el 1er Flisol Fusagasugá en el Instituto Técnico Industrial de Fusagasugá, la Jornada de Software Libre y una práctica de antenas en la UdeC Fusagasugá y el Taller de Software Libre en la UdeC Soacha. Entre esos días también tuve la oportunidad de conocer el pueblo de San Bernardo.

AlterMundi is taking part in the WBMv6

Thanks to the collaboration of various related organizations, we managed to raise the necessary funds for Nico and Gui to travel to Aalborg, Denmark and participate in the Wireless Battle of the Mesh v6. This would have been impossible without the kickstarting offering of Simon Wunderlich and Saverio Proto, the generous help of Al Cano Santana, and the inconditional support of Ramón Roca and Roger Baig Viñas. This combined effort not only allows us to travel and stay in Denmark; […]

Algunas citas sobre la innovación

Transcribimos fragmentos de «Eben Moglen»:, que ilustran de forma muy clara y concisa el origen de la innovación galopante que se vivió en esta última década.
Para cerrar, complementamos citando a un autor argentino (Santiago José Roca), que nos llama a reflexionar y resignificar la _definición_ del concepto «innovación».

AlterMundi endorses the Battle of the Mesh v6

The Wireless Battle of the Mesh is an event that aims to bring together people from across the globe to test the performance of different routing protocols for ad-hoc networks, like Babel, B.A.T.M.A.N., BMX, OLSR, and 802.11s. Of course, new protocols (working on OpenWRT) are always welcome! This year the event will take place from Monday 15th till Sunday 21st of April at the University of Aalborg, Denmark. AlterMundi endorses and supports the Battle of the Mesh v6 because of […]

IPs públicas para todo el mundo

Un modelo innovador de _tunnel broker_, implementado y ofrecido por AlterMundi, permite a las redes libres tener IPs públicas globales, manteniendo latencias bajas en la comunicación con otras redes participantes. La propuesta simplifica la administración de rangos IP dentro de las redes, al mismo tiempo que permite acceder y publicar contenidos en la _Internet v6_.

DIY PoE-enabled gigabit router

Doing _Power-over-Ethernet_ on a Gigabit port might seem challenging at first sight: since all 4 pairs of UTP are used as data lines, there are no «spare» pairs to use exclusively for sending DC current, as in 100mbit ethernet cables.
However, it’s possible to inject (and extract) DC voltage _on the data pairs_, using *center-tapped transformers*, preserving the signal transmission intact and the gigabit speeds of the port.

DIY PoE-enabled 100mbit router

Most CPEs and outdoor equipment support PoE out-of-the-box, and come with a PoE injector so that you can run a long length of UTP between the power source and the equipment.
Most SOHO routers don’t come with this feature, but with a few tools, minimal soldering skills, and 10 spare minutes, you can pull out this hack and obtain more flexibility than most CPE solutions offer.