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 Subject :Re:Re:Homebrew Power over Ethernet.. 2013-06-13- 02:32:57 
KJ4AJP
Member
Joined: 2013-03-24- 12:21:59
Posts: 35
Location: NW Tennessee EM56ni
 
Forum : Hardware
Topic : Homebrew Power over Ethernet

Thanks for the offer (and testing tips from you and KD5MFW). 

I actually have a Gv2 that took the firmware but doesn't show S/N ratio, so I assume the radio's dead in it.  I kick myself for giving the guy good feedback for quick shipping before testing it, but absorbed its minimal cost in the other 5 I bought from other sellers that did work, and in particular the GLv1.1 that was given me by a non-ham (the one with DD-WRT I had issues with).  I did try desoldering the RP-TNC from the dead one but the body was acting as a heatsink and after burning my fingers enough I decided to cut the coax on the crippled one, solder on the 1/2W and put the PCB back in it's case.  The plan is to use it with a 2W amp, so I only need one output anyway.  It's working fine with the stock antenna, linking with the other 5.  I have them all set up in the office (PBX room here at the University, I'm the Telephone Tech), I'm just waiting on $$$ for antennas and adapters (and VoIP hardware... and IP cameras...). Then I can get out and do some "real world" distance tests

I'm glad to see MESH made QST's cover!  I'm having a blast with them so far, 10 years ago when I was doing the University's data wiring and 5 before I got the Ham license, I was doing things like this:

http://www.utm.edu/staff/relmore/wireless/

My main supplier was Hyperlink, this was before they were acquired by L-Com, and I bought connectors and tooling from FAB.  We had limited clients attaching to the network back then, now with every student having a smartphone looking for an IP there are around 800 Aruba APs across Campus.

Our area is fairly flat, and trees grow taller than the 4-story buildings on Campus (tallest buildings in the area), so I don't know how well MESH can be implemented for any long-range use, but I just need to get out and experiment once I have the goodies.

--
KJ4AJP



[K5KTF 2013-06-12- 12:05:13]:

BTW, if you want, I have a couple dead wrt's that have perfectly good RP-TNC's that can be scarfed from (I have already grabbed some parts off them)

Or, you can always take the coax right to the PC board from an N connector in an enclosure or something. We have done that, removed the TNC's and wired straight to N's.


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 Subject :Re:Utah County.. 2013-06-12- 17:25:22 
kg7dgh
Member
Joined: 2013-05-09- 15:54:30
Posts: 9
Location
Forum : Utah
Topic : Utah County

I've got a node at my house in Highland plugged into my small solar panel and emergency batteries. No directional antenna yet as I don't have anything to point at. We're also talking about this project at MakeSLC and I think we can get a node set up on top of our building there in Salt Lake.
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 Subject :Re:Re:Homebrew Power over Ethernet.. 2013-06-12- 13:58:11 
wx5u
Member
Joined: 2013-01-02- 00:30:45
Posts: 188
Location: Austin, TX
Forum : Hardware
Topic : Homebrew Power over Ethernet


I'm sure pointing the finger at Joe will be much appreciated after the damage is done, perhaps during an emergency, or when he damages the network switch at some public safety site where your local ham radio group is helping. 

Or when you apologize because you gave Joe the wrong router and though you had given him one of the ones you hadn't modified the power on.




[KJ4AJP 2013-06-11- 02:30:35]:

wx5u -> Plugging one of our bootleg ethernet powered connectors into a "standard" gigabit ethernet device, it might cause damage.
<snip>
wx5u -> If your buddy Joe is working on your HSMM repeater site and decides to plug his laptop into your "ethernet" cable, you might damage something.

No, Joe might damage something.  Your FCC license gives you the leeway to experiment with your equipment, and if you're going to modify anything it stops being "plug and play".  So if you authorize Joe or anyone else to work on your system, you need to train them in any peculiarities of its installation and operation.  If they work on it without your authorization and training, then they take on the obligation of any smoke that gets out.

wx5u -> This is not "PoE" or "Power over Ethernet," which is a defined standard.  We should probably not use that term.

How about "Power over Ethernet Cabling" (POEC)?

Actually I like POTSAC (Power Over Too Small A Conductor).  Wink

--
KJ4AJP


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I'm not part of the development team, so take what I say with a grain of salt. I'm also easily confused.

Check out the free Wireless Networking Book
 Subject :Do I have a bad WRT54G?.. 2013-06-12- 12:35:16 
wc3xs
Member
Joined: 2013-06-06- 22:25:20
Posts: 13
Location
Forum : Problems & Answers
Topic : Do I have a bad WRT54G?

I had 4 nodes all running HSMM-Mesh. Today while installing some packages and doing some reconfiguring, one of the nodes locked up. The power light was flashing and the DMZ light was lit. I could not access it from the network. 

I was a able to boot into failsafe but when I tried to mount_root, it came back with the message "bus error". 

Is there a way to fix this or did the hardware fail?  I cannot find much online about this error. 

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 Subject :Re:Homebrew Power over Ethernet.. 2013-06-12- 12:18:55 
KD5MFW
Admin
Joined: 2010-01-18- 23:02:11
Posts: 104
Location
Forum : Hardware
Topic : Homebrew Power over Ethernet

Over several models of the WRT54G, Linksys changed right and left antenna ports for no good reason. We made a good faith effort to test all models for left and right and have the firmware try to make left and right the same for all models. Is there any proof the router actually puts out proper RF on any connector? The radio might be damaged and not be putting out useable RF on either antenna connector. If so, trying to change ports would do no good. I suggest using diversity and let the radio see if the radio works properly. (links to another mesh node). If that works, you can try to find where the working RF is coming out of the box. Hope this helps. -Glenn, KD5MFW
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 Subject :Re:Homebrew Power over Ethernet.. 2013-06-12- 12:05:13 
K5KTF
Admin
Joined: 2010-01-18- 23:04:04
Posts: 266
Location: 5' from this webserver
  
Forum : Hardware
Topic : Homebrew Power over Ethernet

BTW, if you want, I have a couple dead wrt's that have perfectly good RP-TNC's that can be scarfed from (I have already grabbed some parts off them)

Or, you can always take the coax right to the PC board from an N connector in an enclosure or something. We have done that, removed the TNC's and wired straight to N's.

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Last Edited On: 2013-06-12- 12:06:28 By K5KTF for the Reason
B-) Jim K5KTF EM10bm Cedar Park, TX :star:
 Subject :Re:Re:Re:Re:Re:Homebrew Power over Ethernet.. 2013-06-12- 12:03:34 
K5KTF
Admin
Joined: 2010-01-18- 23:04:04
Posts: 266
Location: 5' from this webserver
  
Forum : Hardware
Topic : Homebrew Power over Ethernet

Truthfully, I think it depends on the model number of the hardware.

I have played with a number of them, and with most,  I cannot tell if there is a difference when I kick them left or right or diversity.

I think I found one where where I could actually tell the difference, so usually I just leave mine in diversity and let IT figure out the best jack to use.

Maybe the GL's do more or something, as I dont play with those much (I usually keep on the lookout for Gv2's so I can make more USB nodes, or GSv2 to make application nodes)

What I would do, to test, is have a known AP off as far as you can, then hook a directional ant to one port, and kick the setting back and forth, while looking at wifi scan. Maybe even rotate polarity as well (30db drop). Those of us without a VNA (analyzer) have to just shoot in the dark..

Sorry I couldnt help more, but that has been my experience over the last 3+ years.

73

KTF



[KJ4AJP 2013-06-12- 11:43:51]:

How do you test to see what antenna port is what? 

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B-) Jim K5KTF EM10bm Cedar Park, TX :star:
 Subject :Re:Re:Re:Re:Homebrew Power over Ethernet.. 2013-06-12- 11:43:51 
KJ4AJP
Member
Joined: 2013-03-24- 12:21:59
Posts: 35
Location: NW Tennessee EM56ni
 
Forum : Hardware
Topic : Homebrew Power over Ethernet

Good to hear... seriously.  Since you're an Admin and responding, would you like to take a stab at the question I've posed 3 times so far without a response?  (I did get a response, but it was from someone scolding me for using LMR400 rather than Cat5... but ignoring the actual question). 

How do you test to see what antenna port is what?  I have a router with a bad RP-TNC jack I did a eBay "Make Offer" and got for a song.  I soldered a 47 ohm resistor on the broken jack side as a dummy load, then put enough LMR400 on the good RP-TNC to get a 12dBi panel antenna out of the shop so a wireless utility on a laptop wouldn't get signal from the dummy load.  I switched both TX and RX to Left, and then to Right in the firmware, but there was no difference in signal level.  Is the router going to send out a carrier to both antenna jacks no matter what, and only one have data on it?  Do I need to take another node out to see which setting actually passes data?
--
KJ4AJP



[K5KTF 2013-06-12- 08:01:32]:

-50foot is my longevity experiment... passing so far.


[KJ4AJP 2013-06-11- 22:09:25]:

Personally, I wouldn't do a permanent install of a $20 device designed for a indoor environment on a tower any higher than I could reach with a 10' stepladder. 


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 Subject :Re:Tripod.. 2013-06-12- 09:22:18 
KC4BQK
Member
Joined: 2010-10-09- 10:20:10
Posts: 34
Location: Henderson KY
 
Forum : General
Topic : Tripod

Thanks for your answer, I am looking at all the different ways of solar. 73 Jim KC4BQK
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 Subject :Node Overheating Issues ?.. 2013-06-12- 08:13:57 
KN5G
Member
Joined: 2013-04-25- 15:30:05
Posts: 5
Location: Henderson, Texas
Forum : General
Topic : Node Overheating Issues ?

I took one of my nodes out of the OEM case and mounted it in a NEMA-4 (weather proof) enclosure. I removed the antenna mount that is wired across the PC board off of the board and mounted it in the bottom of the enclosure.  The other antenna fitting I left as is and left the OEM antenna on it.  The external antenna connector now has a YAGI antenna connected to it. The YAGI will be mounted on the mast above the enclousre, with the node inside. The node will be powered by POE with battery and solar panel.

My concern is temperature control inside the enclosure. Should I be concerned about the componets of the node overheating inside the small enclosure when it's closed up and mounted out in the sun ? The plastic OEM case was pretty well ventilated, but this new arrangement will not allow for any air flow inside the closed box.

Anyone else aleady been down this road and experianced any over heating issues with the node ?

Thanks,

Keith

KN5G

Node in NEMA-4 Enclosure

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Keith - KN5G - Henderson, TX.
 Subject :Re:Installing packages and port forwarding.. 2013-06-12- 08:07:47 
K5KTF
Admin
Joined: 2010-01-18- 23:04:04
Posts: 266
Location: 5' from this webserver
  
Forum : Applications
Topic : Installing packages and port forwarding

There are TWO ways for DMZ: NAT mode with a host IP in DMZ, and 1/5/13 DMZ-Host mode.

For NAT mode, If you have a host IP in the DMZ, it works like this :

If you add port forwarding to other machines on the LAN, those take priority over the DMZ.

Anything coming in, if there is a port-map for that port, that will take place;

If there is no port mapping (aka all other traffic), then it gets sent to the DMZ host.


Does that help?

KTF




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Last Edited On: 2013-06-12- 08:08:06 By K5KTF for the Reason
B-) Jim K5KTF EM10bm Cedar Park, TX :star:
 Subject :Re:Re:Re:Homebrew Power over Ethernet.. 2013-06-12- 08:01:32 
K5KTF
Admin
Joined: 2010-01-18- 23:04:04
Posts: 266
Location: 5' from this webserver
  
Forum : Hardware
Topic : Homebrew Power over Ethernet

K5KTF-50foot has been up on the push-up pole now for about 3 years, in the plastic Orbit box mind you, and has had no problems, running 14VDC up about 60' of regular cheap CAT5e (not even plenum rated) cable. Yes the sheathing may be starting to crack in places on the wire, but its still cooking.

I have taken it down for other things (webcam & other things), but the same board in the same box, and it even survived the 110*+(F)-for-80+days Central Texas drought of 2011 without a glitch.

-50foot is my longevity experiment... passing so far.


KTF




[KJ4AJP 2013-06-11- 22:09:25]:

Personally, I wouldn't do a permanent install of a $20 device designed for a indoor environment on a tower any higher than I could reach with a 10' stepladder.  I'd be spending the money on an amp and have my radios at ground level.  I realize we're Hams and experimenters and on a budget, but with all due respect to Titan Wireless and Fab Corp, take a look at how it's really done:

https://www.tessco.com/yts/systems_supported/base_station_infrastructure.html

--
KJ4AJP


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B-) Jim K5KTF EM10bm Cedar Park, TX :star:
 Subject :Installing packages and port forwarding.. 2013-06-12- 04:06:36 
wc3xs
Member
Joined: 2013-06-06- 22:25:20
Posts: 13
Location
Forum : Applications
Topic : Installing packages and port forwarding

I have installed the tftp-hpa package and it works. However, if I enable the DMZ host in port forwarding, I can no longer access tftp from my workstation. 

What configuration keeps services like port 8080 and 2222, etc. bound to the mesh gateway and allows others to pass to the DMZ host?

Thanks in advance,

Jesse - WC3XS

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 Subject :Re:Re:Homebrew Power over Ethernet.. 2013-06-11- 22:09:25 
KJ4AJP
Member
Joined: 2013-03-24- 12:21:59
Posts: 35
Location: NW Tennessee EM56ni
 
Forum : Hardware
Topic : Homebrew Power over Ethernet

Mine will remain unmodified, and the reasoning is that in the event mutual aid is needed, unless everyone involved in the deployment has spares for their modified equipment, there is no universal compatibility if a unit fails and needs quick replacement.  If my modified router goes out, Joe can't bring in his unmodified router to replace it. 

If one chooses to power their routers over the TP rather than a separate, larger gauge cable, then a box at each end like I originally proposed makes more sense.  The boxes are universal for either side, and with PowerPoles on both your PSU and a coaxial jumper for the router, you're set.  All you have to do is train an op on what the"Equipment" and "Cable" labels on the jacks mean.

Personally, I wouldn't do a permanent install of a $20 device designed for a indoor environment on a tower any higher than I could reach with a 10' stepladder.  I'd be spending the money on an amp and have my radios at ground level.  I realize we're Hams and experimenters and on a budget, but with all due respect to Titan Wireless and Fab Corp, take a look at how it's really done:

https://www.tessco.com/yts/systems_supported/base_station_infrastructure.html

--
KJ4AJP



[VA3WPN 2013-06-11- 14:26:51]:

This is all mish mash. Its all about the experimenting right? What I have done is gone a step further, and put in some diodes. This prevents feed back from the power adapter back threw the WAN port. That keeps the attached equipment safe. I also label my Modified Routers as MODIFIED.

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 Subject :Re:Homebrew Power over Ethernet.. 2013-06-11- 14:26:51 
VA7WPN
Member
Joined: 2013-04-29- 12:21:43
Posts: 60
Location: BC, Canada
 
Forum : Hardware
Topic : Homebrew Power over Ethernet

This is all mish mash. Its all about the experimenting right? What I have done is gone a step further, and put in some diodes. This prevents feed back from the power adapter back threw the WAN port. That keeps the attached equipment safe. I also label my Modified Routers as MODIFIED.
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 Subject :Re:Phoenix area Mesh.. 2013-06-11- 11:29:31 
K7VZ
Member
Joined: 2013-06-11- 11:02:55
Posts: 6
Location
Forum : How we used HSMM-MESH™
Topic : Phoenix area Mesh

I live in N. Phoenix. I just installed the firmware on a WRT54GS today and plan to get it on the air with a better antenna soon. I look forward to operating not only from home, but mobile as well.
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Virgil K7VZ
http://www.4x4ham.com
 Subject :Re:Homebrew Power over Ethernet.. 2013-06-11- 02:30:35 
KJ4AJP
Member
Joined: 2013-03-24- 12:21:59
Posts: 35
Location: NW Tennessee EM56ni
 
Forum : Hardware
Topic : Homebrew Power over Ethernet

wx5u -> Plugging one of our bootleg ethernet powered connectors into a "standard" gigabit ethernet device, it might cause damage.
<snip>
wx5u -> If your buddy Joe is working on your HSMM repeater site and decides to plug his laptop into your "ethernet" cable, you might damage something.

No, Joe might damage something.  Your FCC license gives you the leeway to experiment with your equipment, and if you're going to modify anything it stops being "plug and play".  So if you authorize Joe or anyone else to work on your system, you need to train them in any peculiarities of its installation and operation.  If they work on it without your authorization and training, then they take on the obligation of any smoke that gets out.

wx5u -> This is not "PoE" or "Power over Ethernet," which is a defined standard.  We should probably not use that term.

How about "Power over Ethernet Cabling" (POEC)?

Actually I like POTSAC (Power Over Too Small A Conductor).  Wink

--
KJ4AJP

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 Subject :Re:Tripod.. 2013-06-10- 17:13:01 
K6AH
Member
Joined: 2012-03-05- 10:47:45
Posts: 181
Location: San Diego, CA
Forum : General
Topic : Tripod

Jim, There are a number of posts regarding solar charging on the site... I'm not an expert. I took the over-design approach and use a 24ah 12v battery, a 40-watt solar panel at 17 volts and run it through an inexpensive charge controller. Subjectively, the node has made it through 3 consecutive days of rainy weather and not failed. Andre, K6AH
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Running 3.0.1
 Subject :Homebrew Power over Ethernet.. 2013-06-10- 05:18:07 
wx5u
Member
Joined: 2013-01-02- 00:30:45
Posts: 188
Location: Austin, TX
Forum : Hardware
Topic : Homebrew Power over Ethernet

There's a risk here, too.  If someone later takes that particular WRT, plugs in a regular WRT power supply, then plugs that WRT into a network, you're now feeding 12V back onto the signal wires into your gigabit capable switch. 



[K5KTF 2013-06-09- 05:28:15]:

You CAN open the WRT, take the board out of the plastics, flip it over and add a jumper that shorts Pins 4 and 5 and then over to the + on the barrel (DC IN) and pins 7 and 8 to the - (minus).


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I'm not part of the development team, so take what I say with a grain of salt. I'm also easily confused.

Check out the free Wireless Networking Book
 Subject :Re:Homebrew Power over Ethernet.. 2013-06-10- 05:13:48 
wx5u
Member
Joined: 2013-01-02- 00:30:45
Posts: 188
Location: Austin, TX
Forum : Hardware
Topic : Homebrew Power over Ethernet

This is not "PoE" or "Power over Ethernet," which is a defined standard.  We should probably not use that term.  Official PoE involves a smart PSE (Power Source Equipment) to supply power and a smart PD (Powered Device) to tell the PSE that it's capable of receiving power.   If someone plugs a "standard" PoE device to one of our homebrew nonstandard RJ-45 plugs, damage might result. 

Also, although 10 and 100 Mbs devices only use 4 wires, Gigabit ethernet devices use all 8 wires for signal.  Plugging one of our bootleg ethernet powered connectors into a "standard" gigabit ethernet device, it might cause damage.   For that matter, even a 10/100 Mbs device might have the other 4 pins hooked up to something.

This could get really bad if you're at a site where someone other than you might be working on the equipment.  If your buddy Joe is working on your HSMM repeater site and decides to plug his laptop into your "ethernet" cable, you might damage something.


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I'm not part of the development team, so take what I say with a grain of salt. I'm also easily confused.

Check out the free Wireless Networking Book
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