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Alternative Frequency Wireless Ethernet Devices?
rtgree01 asks: "Do Slashdot readers know of any wireless ethernet devices that are not 900 MHz, 2.4GHz, or 5GHz. This is for a project that will be in an extremely harsh EMI area (thousands of V/m at those frequencies). Also, to make things even more impossible, line of sight is not available, even though the range for this system should be 30 feet max. Some of you might suggest to stick with a standard wired solution, but that is not optimal at all. Any suggestions would be greatly appreciated."
I don't know the exact setup you have, but IR with mirrors might work
30 feet that is it? Hell use sneaker net and pay a intern 5.25 and hour to run the data back and forth.
Get a marketing intern for 10baset, a business intern for 100baseT, and a CS intern for 1000baseT. Keep in mind for the 100/1000 you going to need 2 interns for the full duplex.
If you want to figure out what is going on with your workers just pick up one of the tri delta girls and set her to permiscous mode......
Neck_of_the_Woods
#/usr/local/surf/glassy/overhead
High EMI, mmmm.
Since line of site and wires seem to be out, maybe more creative ideas are needed. Since you don't say what the data transfer rate needs to be, I'll assume it's not high.
For low rates perhaps sound pulses would work. This would bring meaning back to the term "ping".
Another possibility would be paper tape. A pair of writers/readers with the tape running between them would be immune to EMI, and the tapes go around corners nicely.
Ham radio operators have been sending TCP via radio at all frequencies in the electromagnetic spectrum for many years. While you say that the common frequencies are no good due to EMI, how about elsewhere?
Another possibility is a hybrid system; wires where they work well, optical where EMI is high might work well.
It must be Open Source.
It must look pretty.
It can't be composed of matter.
It can't have been thought of by a carbon-based lifeform.
It must call me 'Capt. Studjammer' or at least 'Sir Booth Studdington'.
Pancakes!
24/7 always-on paradigm outside the box proactive functionality.
Keep your packets off my GNU/Girlfriend!
You could use MURS along with a ham rig. Or even better if you have the time, use a licensed frequency.
I am curious what environment that you need this at where you u have large amounts of voltage and signal, yet do not have control of the area? Off hand, this makes no sense unless this is needed to get around something that you are not supposed to be in. The implication is that you have a fence with high voltage and windowless wall to communicate through, like a prison. Otherwise, I suggest if you have permission/autharization, then use fiber (30 ft) or use laser.
I prefer the "u" in honour as it seems to be missing these days.
Depending on the amount of data you need to transmit.. GENRIP, GENeric Radio IP, based on STRIP , may work for you. As discussed here before, it basically extends IP over any serialized radio. So, you can choose your own frequency and power.
next
He wasn't talking about ham radio, he was talking about training pot-bellied pigs to carry the data back and forth. They're very smart, you know.