"why is everyone staring at us"
[glance back at where we were sitting]
and, while we're here, FAQ:
- It's a Yagi-Uda antenna for 2.4 GHz wifi with a gain of about 16-17 dBi across the band (center is channel 6 at 2437 MHz)
- It's also a cane
- We are able-bodied and don't need a cane at the moment, but we're hardly letting that stop us
- It uses a TP-Link TL-WN722N V1 wifi transceiver, a Raspberry Pi Zero W, and a USB battery bank as its onboard electronics
- The transceiver is capable of 20 dBm TX and around -90 dBm RX
- Maximum range is measured in kilometers
- Typical operating mode: Cane keeps the Pi Zero's onboard transceiver broadcasting a very low-power hotspot, which we use to connect over SSH and control the main transceiver in monitor mode
- Can also act as a wifi repeater, either to gain connectivity from distant hotspots or launch a nearby hotspot to a distant device
- Due to attenuation through building materials, it can rarely reach more than a few tens of meters in dense urban areas
- Battery lasts for 12 hours of constant use
- We could probably use it to try to break into poorly-secured hotspots, but as far as we are concerned, actual cracking is a boring use of aircrack-ng, and we prefer to use it for information gathering and exploration instead, or for remotely accessing our other RPi-based creations.
- Being a decent direction finder, it's also useful as a bug sweeper for motels and B&Bs.
- It comes in just under the wire for FCC EIRP limits, and is not illegal.
- this particular cane has no ability to interact with the 5GHz wifi band, which we do consider to be a significant issue. we are working on making a miniature version (it will end up being a bit less than half the length, same proportions) as well, but we have some fiddly bits to work out on that plan.
the miniature version will either a) be its own thing (a concealable dagger-like instrument) or b) attach to the back of the cane handle of this one, in-line with the existing boom.
@l00ptr at the time the picture was taken, jacking into the xfinity hotspot down the block. more generally, all a manner of wifi-related shenanigans.
@diodelass I know a few people who play with 2 yagi antennas to improve their mobile data connection :) living in middle of nowhere they can get very impressive internet connectivity that way (even better then me when I was living into a big city)
@pillowcat well um
1. the hardware is already done in this photo, we were just working on the linux plumbing in its OBC
2. it's a directional wifi antenna, so it involves no stimulated emission and is not a laser
3. it's not a Taco Bell, it's the basement of a desanctified church that has these tables for some reason
but yeah, the overall form you have here is correct
@eleos wifi! this cane is sort of our mobile wireless network hacking/probing/investigation platform.
@eleos for now, hobby. we suspect it will come in handy for our work, though.
we'll post more about it from time to time.
@diodelass bun only understood half of these things but is very impress and wants to touch the shiny now
@petra it's an endfire antenna, so you aim it right at the target like a rifle. it's not perfect or anything, so you hear and are heard by lots of stuff that's far off-axis or even behind it, but the direction of maximum intensity is straight off the end of the boom.
@diodelass we’ll need to meet each other after the apocalypse. Stuff like that will be needed to rebuild networks and I know nothing about wireless networks (but a lot about wired l2 and l3/4)
@wxcafe hopefully, we'll have time to build our planned 900MHz LoRa cane, 5GHz 11ac dagger, and helical EMP rifle before the apocalypse arrives and cuts off our supply lines.
@aliasless oh, we are just getting started
we're a young witch who just constructed her first staff in a coming-of-age ritual. we have much ground to tread yet.
@aliasless it's a long path - why do you think witches are usually depicted as being old women? - but we're doing well for ourselves so far
@CalmByte @aliasless that is basically our whole mindset here
- wireless networks are part of the magic that runs the world
- by delving into esoteric writings and the fell murmurings of accursed things from beyond the plane, you can learn the shape of the Wireless Plane and grow your power
- reaching into the Wireless Plane requires specialized instruments; we have used our rudimentary skills to construct a particularly versatile instrument for this purpose
@CalmByte @aliasless from this mindset, the people pushing to expand the "internet of things" are basically saying "why don't we open portals linking the Materium to the Wireless Plane at every important juncture, all over the world? sure, there are nasty things on the other side, but who cares, it'll be cool"
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