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DisasterRadio (view source)

Revision as of 04:45, 31 October 2017

2,566 bytes added ,  04:45, 31 October 2017
updated disasterradio site with some prelim info architecture for site
(updated disasterradio site with some prelim info architecture for site)
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<center>''A disaster-resilient communications network powered by the sun.''
[[File:Disasterradiosplash.gif|300px|wrap]] </center>
= Introduction =
= Introduction =


DisasterRadio is an off-grid (solar-powered) low-bandwidth long-range mesh network built on free and open source software and affordable open hardware.  
DisasterRadio is an off-grid (solar-powered) low-bandwidth long-range mesh network built on free and open source software and affordable open hardware.  


''A disaster-resilient communications network powered by the sun.''
The nodes are small and entirely self-contained units that can be deployed simply by leaving them in a place with sun. They are intended for either manual or drone-deployment on rooftops or in windows. They use high gain omni-directional antennas on 915 MHz using the LoRa PHY (Chirp Spread Spectrum) to talk to each-other and a downward-pointing/inward-pointing high gain wifi antenna to talk to user devices (phones/tables/laptops) inside the buildings on which they are placed. They use a low-power microcontroller running a web server that lets anyone use the network as long as they have a device with wifi and a web-browser.


The nodes are small and entirely self-contained units that can be deployed simply by leaving them in a place with sun. They are intended for either manual or drone-deployment on rooftops or in windows. They use high gain omni-directional antennas on 915 MHz using the LoRa PHY (Chirp Spread Spectrum) to talk to each-other and a downward-pointing/inward-pointing high gain wifi antenna to talk to user devices (phones/tables/laptops) inside the buildings on which they are placed. They use a low-power microcontroller running a web server that lets anyone use the network as long as they have a device with wifi and a web-browser.
= Updates =
* Status as of 31 October 2017: [[User:nanomonkey]] and fritz received the custom PCB boards they designed. got one working tonight \o/
* Status as of June 10th 2017: Basic chat between two nodes working. A more fleshed-out website should appear here soon.


Bandwidth is < 2000 kbits/sec.
= Applications =


The in-development apps are secure chat and community resource mapping (an offline map that communities can use to add resources, like [http://tidepools.co/ tidepools]).
The in-development apps are secure chat and community resource mapping (an offline map that communities can use to add resources, like [http://tidepools.co/ tidepools]).


Code is here: https://github.com/sudomesh/disaster-radio-nodemcu
= Technical Specifications =
* Bandwidth: < 2000 kbits/sec.
* Power: Nodes need at minimum a 6V, 3W solar panel plus a battery capable of 3600mAh
 
== Components ==
All are initial estimations, probably missing a component or two and haven't scoured for bulk prices on everything [[User:Tunabananas|Tunabananas]]:
* [https://tinurl.com/y7sytmox ESP8266] - $2.50
* LoRa Transceiver - [https://www.digikey.com/products/en/rf-if-and-rfid/rf-transceiver-modules/872?k=RFM95 HackRF RFM95W] - $7 OR [Dorji DRF1276G](https://www.tindie.com/products/DORJI_COM/868mhz-915mhz-sx1276-module-drf1276g/) - $6
* [https://www.seeedstudio.com/fusion_pcb.html Custom PCB - ~180x120, 1 layer, 100ct] - $6.50
* [https://www.ebay.com/itm/GSM-900MHZ-Omnidirectional-Wireless-Module-Antenna-SMA-Head-5DBI-19cm/281782888586900MHz Directional WiFi Antenna 5dBi] - [another option](https://www.tvc-mall.com/details/3w-6v-diy-monocrystalline-silicon-solar-panel-145mm-x-145mm-sku85020025a.html?c=USD&utm_source=google&utm_medium=pla&utm_campaign=cse&gclid=Cj0KCQjwm9vPBRCQARIsABAIQYfM_ndtJ1RmWUGdkqA8Um40bBY9H3kJ9xRg6gLKMoaC65sB17ZRiJ4aAhHdEALw_wcB) - $3
* [https://www.ebay.com/i/121104191012?chn=ps&dispItem=1 Solar Panel - 6V, 3W, 120mAH] - [another lead](https://www.tvc-mall.com/details/3w-6v-diy-monocrystalline-silicon-solar-panel-145mm-x-145mm-sku85020025a.html) - $5-6
* [http://www.dx.com/p/ultrafire-18650-3-7v-3600mah-batteries-pair-50486 LiOn Battery] - 3.7V 3600mAh - $4
OR
* LTO battery? - NEED TO RESEARCH COSTS
* [https://www.adafruit.com/product/2745 3.3V buck converter] - $5
* Enclosure - ~$5
'''* Total: ~$40'''
 
= Documentation =
* Code is here: https://github.com/sudomesh/disaster-radio-nodemcu
* Documentation wiki is here: https://github.com/sudomesh/disaster-radio/wiki
* Network visualization simulation: https://jemucino.github.io/disaster-radio-netsim/


== Presentations ==
[[User:juul|juul]] gave a [https://www.youtube.com/watch?v=tPJj3zCyRpI talk about this at the 2017 BATTLEMESH in Vienna]. [http://battlemesh.org/BattleMeshV10?action=AttachFile&do=get&target=disasterradio_juul.odp Slides]
[[User:juul|juul]] gave a [https://www.youtube.com/watch?v=tPJj3zCyRpI talk about this at the 2017 BATTLEMESH in Vienna]. [http://battlemesh.org/BattleMeshV10?action=AttachFile&do=get&target=disasterradio_juul.odp Slides]


Status as of June 10th 2017: Basic chat between two nodes working.
== User Research ==
[[User:Tunabananas|Tunabananas]] designed [http://wiki.tidepools.co/view/Ethnography use cases and user stories] for the decentralized mobile mapping application Tidepools in early 2013, based on open-ended interviews with community residents and various organizations engaged in technology equity and access.


A more fleshed-out website should appear here soon.
= Licensing =
* [https://github.com/sudomesh/disaster-radio/tree/master/firmware firmware/]: Dual licensed under both GPLv3 and AGPLv3
* [https://github.com/sudomesh/disaster-radio/tree/master/web web/]: AGPLv3
Tunabananas
Bureaucrats, oversight, Administrators
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