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 Forum index » Advanced Topics » Cutting edge
Non standard (superchannel) WiFi Channels Atheros Question.
Moderators: Flash, Ian, JohnMurga
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James186282


Joined: 08 Sep 2009
Posts: 142
Location: Minnesota

PostPosted: Fri 23 Oct 2009, 23:07    Post subject:  Non standard (superchannel) WiFi Channels Atheros Question.
Subject description: Re: modifying Atheros driver for ham radio use
 

Hello everyone. I'm a radio "geek" since I got my Ham Radio License in 1976 and a few of my friends have been using custom router software to allow them to go on non Part 15 WiFi channels. One of the projects is to see just how far you can go with 2.4 Ghz or 5 Ghz using external antenna etc. Now, I'm enjoying playing around a Netgear Router but I was wondering if anyone has built a driver that allows this for say a WAG511 card? I've always used these because they are dual band and not too expensive. Plus they have fair output power. I have been soldering SMA connectors to them to make it easier to connect to my "peachcans" antenna.

Ok, I see that some of the MadWifi driver is available as source but the HAL file is intended to keep people on the part 15 channels and not allow fiddling with them or power etc. Which surprises me. I'm NOT trying to hack this and operate in an illegal manner. I've got a license and would very much like to tinker. I'm sure this has been done before having read about "superchannel" in some other forums. However the "how" to do so is still a question.

In the meantime I'm trying to compile madwifi without much luck. It looks for the kernel header files and I've little clue where to find same or where to save them.

I'm only 93% an idiot as I've gotten the compiler linker working and my crude little routines are compiling and linking.

If you have any ideas or direction I will be most pleased!
- James
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James186282


Joined: 08 Sep 2009
Posts: 142
Location: Minnesota

PostPosted: Wed 18 Nov 2009, 17:40    Post subject:    

Just an update to anyone else who is reading this. I was able to compile the latest Madwifi and tinker with the hal enough to allow whatever channels and power levels that I like (32 anyway) My work is "crude" I'm sure as I'm learning Linux, C at the same time. I've done Driver work before I've done many other computer languages but anyway SUCCESS!

Hoo Hoo!

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Science is what we understand well enough to explain to a computer.
Art is everything else we do.
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Aitch


Joined: 04 Apr 2007
Posts: 6825
Location: Chatham, Kent, UK

PostPosted: Wed 18 Nov 2009, 19:56    Post subject:  

Hi James

Interesting stuff - found some other useful info, though I maybe late to the party Wink

http://www.qsl.net/kb9mwr/projects/wireless/modify.html

http://www.qsl.net/kb9mwr/projects/wireless/ham-how-to.html

http://madwifi-project.org/wiki/About/ath5k

Aitch Smile
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mcurran

Joined: 27 Sep 2011
Posts: 1

PostPosted: Tue 27 Sep 2011, 02:33    Post subject:  

Hello:

Could you please provide me some details on how to do this, or maybe even supply me your driver. I have a broadcom (AirForce One) card 802.11 - BCM8413. Which is a Linksys WMP54G-S.

Please let me know...

michaelpcurran@aol.com
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faifpuhp


Joined: 22 Sep 2011
Posts: 97

PostPosted: Tue 27 Sep 2011, 02:47    Post subject:  

Anyone else find it a little amusing that the part of GNU/Linux that says "I'm sorry, I can't let you change the radio channel" is called HAL?

(Also, isn't HAL being phased out? I could be thinking of something related...)

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eztuxer


Joined: 06 Nov 2008
Posts: 483
Location: Belgium

PostPosted: Wed 19 Oct 2011, 16:49    Post subject:  

faifpuhp wrote:
Anyone else find it a little amusing that the part of GNU/Linux that says "I'm sorry, I can't let you change the radio channel" is called HAL?


I do !

Also about HAL, if you take the next letter for each H --> I A --> B L --> M it reads IBM Wink

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Aitch


Joined: 04 Apr 2007
Posts: 6825
Location: Chatham, Kent, UK

PostPosted: Thu 20 Oct 2011, 11:47    Post subject:  

see here for a high power Alfa

http://www.murga-linux.com/puppy/viewtopic.php?p=572588#572588

They also do a 2W N device.....but the real gains come from adding a Yagi [+45dBi]

I've seen 5 miles coverage in London, and suburbs, where the airwaves are pretty congested - in the open or on a pole they should give much further

I use it mainly for my narrowboat....no ham licence, but I can't see why it wouldn't work 'off frequency' Wink

Aitch Smile
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