I'm looking into the usefulness of re-crystalled WRT54s, to operate below 2400MHz
According to this German article (translated) it looks straight-forward. It appears similarly-mod'ed
units will interoperate, but raises questions as to its working with NS2 or TL-WN722, or other unit
in expanded frequency mode through software.

http://www.rlx.lu/~lx1tb/wrt54gs/

I suspect that scaling 20MHz clock to the WRT54 Wifi radio chip (BCM2050) will also
change the OFDM inter-carrier spacing  (nominally 312.5kHz) and other parameters;
unless these can be compensated by firmware changes. From what I read, OFDM
frequency error needs to be substantially less than the spacing, and TX-RX inter-carrier
spacing the same. Does anyone have additional knowledge/experience with this?

For anything which can be properly frequency scaled, the channel centre frequency
should fall very close to 23x2 or 23x7MHz eg. 2362.0; I believe within 100kHz or better.
That limits the choice of crystals. I was thinking of 19.440MHz instead of 19.6608 (which
is a baud-rate crystal and not likely to be as accurate/stable), or another common OTS
crystal 19.200MHz, but none of the 13 new frequencies "lands" close enough to target.
Frequency synthesizer was tried by author above but jitter rendered the link unusable.
I suppose a low-jitter PLL design is possible, if designed carefully.

So far I have not found a detailed spec for the BCM2050 online, to understand better
how it works. Can someone point to suitable documentation?

Dave   VE3KMV

Dave,

I got the AirGrid up on the roof yesterday and have it aimed (best I can muster) towards K2ALB-CENTRAL. My pessimism was rewarded, and it doesn't look like I'll be able to establish a link from my home QTH. I'm going to leave it up for a few days (as I'm not too hot to get right back on the roof) but I don't think the situation will change.

I may talk with the TARA Board and see if they'd be willing to arrange space on the Troy water tower in exchange for me donating the equipment to the club. A link between Troy and Albany would be a great start for a mesh network in our area.

73

Mike K2MTS

I am glad that you able to get into your friends node.  A TFTP flash is almost as easy as uploading from the web interface.  

For the person who finds this thread in the future, I wanted to mention that there is a feature in the UBNT firmware to reset the password.

With the node powered up press the reset button, either on the device or the POE injector, for 5 seconds and the password is reset to hsmm.  Press the reset button for 15 seconds and the node will be reset to a just flashed state.

Hopefully this will help.

Clint, AE5CA

You can find TFTP procedures though a google search. Search for "TFTP Firmware Ubiquiti," and click on the link titled "Firmware Recovery - Ubiquiti Wiki." It will take you here: http://wiki.ubnt.com/Firmware_Recovery

I hope this gets you pointed in the right direction! Let us know if you need any additional support.

Needing to know how to do a hard reset on a Bullet M2 .. Been out of HSMM for a little while and now want to get back into it..  

Please help

kc9gqr

Every Tuesday on 146.91 after the ARES Net.  Starting approximately 2115-2130 (Whenever the ARES net ends)

Miami Valley Mesh Alliance

Join in!

73 N8JJ

most likely just ETX timeouts for distant nodes.

There looks to be a new group online now or at least new to me called AREDN that is based on a like idea of Broadband- hamnet.

Does any one have any knowledge of this group

How is it the same or differnt?

http://www.aredn.org/

hi all i have got a linksis wrt54gl v1.1 off ebay i dont know what the password was its running Openwrt Backfire 10.03.1 Powered by LuCI 0.10.1 Release (0.10.0) how do i reset the password

I ended up getting a static IP for my home router.  It was a private network.  It is working now.

Another issue now is some of the nodes time out.  Some nodes on his end are accessible and some aren't.  All the same version. Any pointers on that?

Kirk - N6SXR