mesh November 2016

mesh@sudoroom.org

13 participants
10 discussions

[URGENT] Networking & web geeks needed at Standing Rock

by Jenny Ryan

Hi all, I've been working remotely with Lisha Sterling with Geeks Without Bounds, Digital Smoke Signals <https://www.facebook.com/DigitalSmokeSignals> and other orgs comprising the Tech Warrior Camp on the ground at Standing Rock. They completed their WiFi bridge to a nearby tribal-owned telecom on Saturday and so the camp now has internet, but they could use support building out an intranet mesh for ready access to Lakota educational materials, medical and legal info, camp-to-camp … [View More]

8 years, 5 months

HAM radio operators needed at Standing Rock ASAP

by Jenny Ryan

Greetings radio geeks, As you're probably aware, over 10,000 Native Americans and allies have converged at the Standing Rock reservation in South Dakota on the lands of the Great Sioux Nation in peaceful defense of the Missouri River, under which the Dakota Access Pipeline is poised to drill to complete the pipeline by January 1st. The main camp, Oceti Sakowin, received an eviction notice from the US Army Corps of Engineers on Friday, demanding the camp be cleared by December 5th - one day … [View More]

8 years, 5 months

I need 1000' of cat5e or cat6 cable

by Jake

this is for my house. i'm willing to donate money to get it, but i'm ready for it now. i know we have tons of these spools laying around, and we'll always get more, so tell me where it is.

8 years, 5 months

Update to Walkthrough doc

by Andrew Dollard

I was setting up a node with https://sudoroom.org/wiki/Mesh/WalkThrough on my Mac yesterday, and in addition to the listed binary dependencies, I had to `brew install gnu-tar`, as the system tar was creating incompatible packages. Can someone update the wiki page to help out other Mac users? Andy

8 years, 5 months

Organizing another door-to-door?

by Andrew Dollard

I'd like help organize another canvas of the neighborhood around the Omni to distribute more nodes. Are there still nodes available to distribute? Anyone interested in helping out? I'm thinking a weekend in early December. Andy

8 years, 6 months

sudomesh area: clean up

by danarauz＠gmail.com

hey marc, i relocated the two pots racks i said will be helping with. when doing that, i noticed that the big bubble like antenna was non secured, it was being held by the network cables that were passing by. anyhow, i unhooked from those wires and now it is on the floor, against the shelf unit. i didn't even dare to attempt to bring it up myself. this is a two folks job. I will return tomorrow, very likely and if you there, we can bring it back up. Oh yes, now we have the space to move the … [View More]

8 years, 6 months

Mesh hack and re-organization night!

by Marc Juul

Tomorrow, Tuesday, at 7:30 pm we'll be hacking on mesh software and reorganizing all our stuffs! No special skills required! Lots of stuff to do! We need to sort our collection of routers into OpenWRT compatible and useful and "everything else"! We need to trace and label all unlabeled ethernet cables going into our switches! We might even plan the build-out of a wall/fence to discourage unauthorized access to the mesh/server area! I spent many hours yesterday getting the bulk of the reorg … [View More]

8 years, 6 months

Sudoroom visit or workshop for high school kids?

by Dustin O'Hara

Hi There! My name is Dustin O'Hara. I'm from Los Angeles. I'm a doctoral candidate and researcher from UCLA. I'm very interested in the Sudoroom, with a special interest in the Sudomesh project. I will be visiting the bay area in early December (5th-9th) to run a weeklong workshop with some high school students. I was hoping someone from Sudoroom / the Sudomesh project might be willing to meet with us and tell us about the space and projects. Additionally, if someone is interested in running … [View More]

8 years, 6 months

Re: [Mesh] pallet of high gain (11dbi) directional wifi antenna's up for auction

by Jake

no if it's a diplexer, it's called a diplexer on both ends. "The diplexer is a different device than a passive combiner or splitter." https://en.wikipedia.org/wiki/Diplexer if it's a splitter, it's described here https://en.wikipedia.org/wiki/Power_dividers_and_directional_couplers the devices are very different. A diplexer divides a port by frequency (above a certain frequency goes to one port, below goes to the other port) and a splitter just doubles or halves impedance. On Thu, 3 Nov … [View More]2016, Martin wrote: > So if it's used on one end it's called a diplexer and a splitter on the > other but it's the same device under the hood. > > Common uses[edit > <https://en.wikipedia.org/w/index.php?title=Diplexer&action=edit&section=1>] > > A diplexer allows two different devices to share a common communications > channel. Typically, the channel is a long coaxial cable, and a diplexer is > often used at both ends of the coaxial cable. The plan is feasible if the > two devices operate on different frequencies. The plan is economical if the > diplexers cost less than running a second cable. > > Diplexers are typically used with radio receivers or transmitters on > different, widely separated, frequency bands. A single city radio tower > might have a police department antenna on 460 MHz and a fire department > antenna on 156 MHz. A diplexer at the top combines the two antenna signals > to the single coaxial feedline, and a second identical diplexer inside the > building separates the feedline signals to the two dispatch radios. Some > diplexers support as many as four antennas or radios that work on different > radio bands. > > Diplexers are also commonly used where a multi-band antenna is used on a > tower, with a common feedline. The diplexer will split the two bands inside > the building (such as VHF and UHF systems combined with a diplexer onto a > common antenna). > > On Thu, Nov 3, 2016 at 5:21 PM, Jake <jake(a)spaz.org> wrote: > >> Martin, >> >> a diplexer is a device to feed one antenna from two transcievers, since it >> splits signals according to their frequencies. >> >> https://en.wikipedia.org/wiki/Diplexer >> >> you might be thinking of a splitter. >> >> John, i have a really nice 2.4GHz directional coupler by Narda, it has four >> ports unlike the slightly similar one in this picture: >> >> http://www.recycledgoods.com/media/catalog/product/cache/1/i >> mage/1000x/af097278c5db4767b0fe9bb92fe21690/n/a/narda- >> microwave-corp.-3002-30-coaxial-directional-coupler-2.0-ghz-1.27.jpg >> >> you can borrrow it if you want, I also have attenuators and stuff like >> that. >> >> -jake >> >> >> On Thu, 3 Nov 2016, Martin wrote: >> >> John, >>> >>> The coupler you got is probably a diplexer - a device to feed two antennas >>> with one cable. >>> >>> To do the testing that you're thinking of requires a directional coupler >>> like this: http://www.ebay.com/itm/Mini-Circuits-Coaxial-RF-Direc >>> tional-Coupler-ZADC-13-2000-1-13dB-SMA-50-Ohm-NEW-/291379146 >>> 740?hash=item43d78ceff4:g:A0IAAOSwqu9U2rgN The seller claims that the >>> units were tested to 2800 MHz and worked. This is a pretty good deal. >>> >>> For the noise source you can use one of these: http://www.ebay.com/itm >>> /DC-12V-0-3A-SMA-noise-source-Simple-spectrum-external- >>> tracking-source-DY2-/172150915301?hash=item2814fe80e5:g:OaUAAOSwI3RW-t7N >>> >>> You don't need a spectrum analyzer - a Hack-RF or similar SDR will do. >>> Connect the noise source to the directional coupler input and the antenna >>> to the coupler output. Attach the SDR to the coupler's coupled port. >>> With >>> your favorite SDR software tune your radio to mid-band (2.442 - 2.447 >>> GHz). Note the receiver power level. Reverse the antenna and noise >>> source, repeat measurement. The larger number is the power delivered to >>> the antenna, the smaller is power reflected back from the antenna. You >>> can >>> use an online calculator like this http://rfcalculator.mobi/ >>> vswr-forward-reverse-power.html to calculate VSWR. The ideal VSWR is one >>> and an antenna with greater than three should not be used. >>> >>> Although the antennas are only rated to 2.2 GHz they may be usable at 2.4 >>> GHz. Check the VSWR. >>> >>> The antennas are probably useful for hams (there's a 902.005 MHz through >>> 927.995 MHz band). I can ask around and see if there's is any interest. >>> You might want to put one one ebay and see if there's a market. >>> >>> --Martin >>> >>> >>> On Thu, Nov 3, 2016 at 1:14 PM, John Fitz <johnfitzeecs(a)gmail.com> wrote: >>> >>> Dang, well I picked up the pallet of antennas and it looks like they're >>>> the CELLMAX-EXT-CPU which only cover 806–960 MHz and 1710–2200 MHz :( . >>>> Hey but on the plus side, they contain tee couplers that are rated for >>>> the >>>> full 698–960 MHz and 1710–2700 MHz. I've needed a 2.4Ghz coupler for a >>>> while now and that alone was worth the minimum bid for me. With one of >>>> those, a noise source and a spectrum analyzer, I can start characterizing >>>> Wifi/Bluetooth antennas. >>>> The antenna design is relatively simple and pretty cool looking. It would >>>> be interesting to try and simulate the design and see how much would have >>>> to change in order to extend the range. Also, if anyone wants to build a >>>> phase arrayed radar system... >>>> >>>> >>>> On Fri, Oct 28, 2016 at 6:57 PM, Marc Juul <juul(a)labitat.dk> wrote: >>>> >>>> Are you sure these cover 2.4 GHz. There are multiple versions of the >>>>> CELLMAX-EXT and e.g. the CELLMAX-EXT-CPU seems to not cover 2.4 GHz >>>>> while >>>>> the CELLMAX-EXT-CPUSE does cover 2.4 GHz: >>>>> >>>>> http://www.commscope.com/catalog/wireless/product_details.aspx?id=151 >>>>> >>>>> https://www.tessco.com/products/displayProductInfo.do?sku=396652 >>>>> >>>>> if we're sure they cover 2.4 GHz then we'd love to get them! I'd pay up >>>>> to $100 in that case >>>>> >>>>> On Fri, Oct 28, 2016 at 4:55 PM, Jake <jake(a)spaz.org> wrote: >>>>> >>>>> pallet of high gain (11dbi) directional wifi antenna's up for auction: >>>>>> https://www.auctionbdi.com/listings/details/index.cfm?itemnu >>>>>> m=1158888078 >>>>>> >>>>>> Fitz says they can probably be won for $25 and i think he's willing to >>>>>> bid on them for sudomesh >>>>>> >>>>>> so if sudomesh wants them, they should tell Fitz how much Sudomesh will >>>>>> pay for the lot. 140 pounds of antennas. >>>>>> >>>>>> Fitz, did you have a datasheet on these antennas? I believe i recall >>>>>> they were wideband in the 900MHz and 2.4GHz bands? >>>>>> >>>>>> >>>>>> -jake >>>>>> _______________________________________________ >>>>>> mesh mailing list >>>>>> mesh(a)lists.sudoroom.org >>>>>> https://sudoroom.org/lists/listinfo/mesh >>>>>> >>>>>> >>>>> >>>>> >>>> _______________________________________________ >>>> mesh mailing list >>>> mesh(a)lists.sudoroom.org >>>> https://sudoroom.org/lists/listinfo/mesh >>>> >>>> >>>> > [View Less]

8 years, 6 months

pallet of high gain (11dbi) directional wifi antenna's up for auction

by Jake

pallet of high gain (11dbi) directional wifi antenna's up for auction: https://www.auctionbdi.com/listings/details/index.cfm?itemnum=1158888078 Fitz says they can probably be won for $25 and i think he's willing to bid on them for sudomesh so if sudomesh wants them, they should tell Fitz how much Sudomesh will pay for the lot. 140 pounds of antennas. Fitz, did you have a datasheet on these antennas? I believe i recall they were wideband in the 900MHz and 2.4GHz bands? -jake

8 years, 6 months

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mesh November 2016