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# Contact
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You can contact the WalT project team by using: walt-contact at lists.forge.imag.fr
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As a WalT user, or if you intend to use WalT, you can also [subscribe to the list of walt users](http://lists.forge.imag.fr/cgi-bin/mailman/listinfo/walt-users).
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# People
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## Project leaders
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- [Franck Rousseau](http://lig-membres.imag.fr/rousseau/), *project leader*
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- [Etienne Dublé](http://lig-membres.imag.fr/duble/), *technical leader & core WalT development*
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## Developers
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- Pierre Brunisholz, *core WalT, testing, documentation & tutorials*
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- Bastien Faure, *core WalT*
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- Pierre-Henry Frohring, *core WalT*
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- Jorge Luis Baranguan Castro, *VizWalT visualization plugin for Cooja*
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- Cosmin Nichifor, *WalT synchronization*
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## Additional support
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- Joao Guilherme Zeni, *sensor integration & Contiki instrumentation*
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- Matheus Castanho, *sensor integration*
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- Iacob Juc, *sensor integration*
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- Liviu Varga, *sensor integration*
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# History
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WalT started as a attempt to fill the gap between small *ad hoc* experiments and large scale remote platforms like [FIT IoT-lab](https://www.iot-lab.info/).
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A [first prototype](http://fablab.ensimag.fr/index.php/Wireless_Tested_based_on_Raspberry_Pi) was developed as a FabLab project at Grenoble-INP [Ensimag](http://ensimag.grenoble-inp.fr/).
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Development was then funded by **Université Grenoble Alpes, Grenoble INP / UJF**, throught **AGIR 2013-2014 WalT project**.
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The following projects are also tightly linked to the WalT platform (co-funding, experiments on WalT):
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- ANR IRIS - Reseaux Tout IP pour le Futur Internet d'Objets Intelligents (2011)
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- FP7 ICT CALIPSO - Connect All IP-based Smart Objects (2011)
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- ANR DataTweet - un service public de communications opportunistes (2013)
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- Persyval SPREAD - Plateforme pédagogique pour l'expérimentation sur des systèmes massivement distribués (2015)
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# Design goals
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A WalT platform can be qualified with the following adjectives.
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## Versatile
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You can 'plug' any OS image on WalT nodes. And WalT provides what you need to create such an image, or adapt an existing one. Someone will use an IoT-oriented image to drive sensor boards connected on USB. Others will add a java virtual machine on the image and run distributed data management scenarios.
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The other factor for versatility is that you can completely adapt the platform shape to your needs. Usually, one will use small size deployments for debugging or mobile demos, and a large size one for final experiments.
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## Lightweight
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WalT is based on [RaspberryPi](http://www.raspberrypi.org/) [SBC](http://en.wikipedia.org/wiki/Single-board_computer)s, [PoE](http://en.wikipedia.org/wiki/Power_over_Ethernet) switches, and a standard PC for the server. There is no specific hardware.
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## Cost-effective
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A WalT platform costs less than 100$ per node.
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## Easy to use
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The demos should prove this point.
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## Easy to install
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We provide a USB image to install the server and a minimal SD-card image for the nodes. The rest of the installation is automated. See the [Setup](setup) page for more info.
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## Collaborative
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OS images of WalT nodes can be shared on the docker hub. This is the case for default images. This helps to collaborate with other users.
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The development of WalT is open source. Anyone interested is welcome to contribute! |
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