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
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 four posts racks, something to do
during the day, so we can see clearly; its a bit dark in the evenings.
thanks,
daniel
--
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Help open a people-powered common space in Oakland, California!
https://omnicommons.org/donate
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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 done, so most of
the legacy junk and non-mesh stuff has been cleared out or put in boxes.
--
marc/juul
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 a hands on workshop with us, we have a
budget that we could hire someone or make a donation to the Sudoroom with;
this would be ideal if possible.
All the best, and thanks!
Dustin O'Hara
310.890.8547
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 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§ion=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
>>>>
>>>>
>>>>
>
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
Last Sunday we gave out 6 nodes to neighbors of the Omni.
Most people who have joined PeoplesOpen in the past are people who are
attracted to the technical and/or political message of mesh networks.
They're willing to put in some effort and are often somewhat technically
savvy.
The people we gave nodes to on Sunday had not heard of PeoplesOpen before
we rang their doorbell, and were often hesitant about the idea, thinking
that it would be technically difficult or intimidating.
I think that we need to think about what will make it as easy as possible
for a new user to get a node set up.
Another consideration is conversion. I think it's really hard to convince
someone to hook a node up to their ISP connection and contribute upstream
bandwidth the first time you knock on their door. If the dashboard has some
information about how much data has been forwarded, this could help people
feel ownership of the network and make them more likely to contribute
bandwidth.
Draft 1:
Hi, I'm a PeoplesOpen.net node. I connect to other nodes around me to move
internet data. If there are enough nodes in an area, we form a "mesh
network" which can provide internet access without the need for an ISP.
Right now, I have 3 mesh neighbors: *mesh26*,* mesh11*, and* sally_b.*
We're connected to the internet through *mesh26*.
I've transferred *10gb* of data to and from my neighbors.
----
I can also connect to a home internet connection and donate bandwidth to
the PeoplesOpen.net. Donated bandwidth is what keeps the network going.
I'll automatically stop sharing bandwidth if you are using your connection.
You can turn sharing on and off here:
----------------------
| Start Sharing |
----------------------
I've transferred *0gb* of data to and from the internet.
Hey guys Leslie jake and I are here and want to get on the roof to run
cables before it gets dark.
Anyone know where the key is?
Also I brought pizza!
Will
