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Free Space Path Loss

published by K3GX on Sun, 10/06/2019 - 11:54
Forums: 
Deployment
I watched the mesh meeting video from yesterday and have a question regarding Andre's Free Space Path Loss table. It appears to be off, but perhaps it is accounting for something that I'm not. For example, he has a path loss of 114 dB for a 1.5 mile link at 2 GHz. I calculate 107.7 dB for 2.397 GHz (Ch -2). All the numbers seem to be off by similar amounts. The equation I'm using is 20*log(4*pi*(distance in m)/(wavelength in m)). Am I missing something?

BTW, enjoyed the meeting content. Thanks for providing!

Thanks,
Dave K3GX
 

Use Aredn for backhaul?

published by KG4FJC on Mon, 10/28/2019 - 13:40
Forums: 
Deployment
Hey all, Please point me in the right direction... first let me say that I'm NOT an IT guy!

Mounting Ubiquity on a base-insulated HF tower

published by km5l on Thu, 08/18/2016 - 10:46
Forums: 
Deployment

Hey everyone.

I have a 52' aluminum tower that I'll be putting up for 160-10 meters.

It's going to be base-insulated and it is mechanically suited to mount the Mesh hardware at the top. So I'm planning this out.

Does the group have experience in mounting WISP devices or our devices on base-insulated AM broadcast towers? I'm wondering about high RF voltage and the impact on the WISP device, depending of course on the HF frequency and where the voltage and current maximums are located - so to make it easy assume high RF voltage.

SNMP on new release, again.

published by w6bi on Sat, 10/27/2018 - 14:20
Forums: 
Deployment
I've installed the new SNMP package (snmpd-opkg) on a node (a Mikrotik, if that makes any difference).
I copied /etc/config/snmpd-opkg to /etc/config/snmpd and removed snmpd-opkg
On inspection it looks like the new /etc/config/snmpd config file should work right out of the box, unless I missed something.

Then I did
./etc/init.d/snmpd enable
./etc/init.d/snmpd start

MeshMap Docker Container

published by W2GMD on Tue, 01/14/2020 - 15:51
Forums: 
Deployment
Hey All,
 
I took some time this past week to get Eric's MeshMap web app working in a Docker container. This should make deployment of the app MUCH easier (albeit you'll need to know a little bit about Docker...)
 
Instructions are available here: 
 
Thanks,
-g

Dual port nodes

published by w6bi on Sun, 02/23/2020 - 21:09
Forums: 
Deployment
 The Ubiquiti Nanostations are valued for their dual-port properties; being able to loop the Ethernet cable into, then out of a Nanostation and on to second node is invaluable in many situations.

For a temporary set-up, we just did:

hAP port 5 -- 20 ft cable --  NSM2 -- 2 ft cable -- NSM5 ------------------ 120 ft cable ---------------------- PBM 5 300

And it worked very well.

However the NSM2 was never as far as I know, revved to the XW hardware.  That puts it on the endangered species list.

AREDN controlled rover bot

published by K1DOS on Tue, 03/03/2020 - 10:42
Forums: 
Deployment

Here are some pics of project I am wrapping up.  3D printed remote controlled rover/bot, controlled by AREDN (XW Bullet).

Hank / K1DOS /DA1KH

Sorry attachment is .pdf - I can not figure out how to load images with a post.

Out of band management schemes?

published by w6bi on Tue, 03/03/2020 - 14:39
Forums: 
Deployment
Periodically a remote node needs power-cycling.  Larger sites typically have nodes connected to a POE-enabled switch that allows individual ports to be power-cycled.
But inevitably the node you need to power-cycle (due to being unreachable) is the node you use to get to the switch :-/
For those situations, some out of band management is needed.   We've discussed using logic outputs from co-located repeater controllers when available, or maybe a VHF or UHF receiver with a tone-decoder + relay outputs.

What are you using for out of band management in these cases?

Internet Connection questions

published by KE0RSX on Tue, 03/03/2020 - 18:27
Forums: 
Deployment
Hi, everyone,

I'm curious if anyone has connected their AREDN node directly to a modem (or some other fashion like that), and has it worked? I know the typical setup is something like this:  modem --> router --> Smart switch --> AREDN Mesh node. But I'm curious about something like this: modem --> switch --> AREDN Node. Would that work, or would it still need to be a managed (Smart) switch?

WAN settings

published by Ai6bx on Sun, 12/29/2019 - 17:46
Forums: 
Deployment
As more WAN Gateways are showing up on the network I am seeing situations where connected devices are failing due to paths that are of equal link distance throwing off UDP traffic. I don't think setting up extended port forwarding tables is going to work in solving this as the UDP ports don't behave as the TCP ports where I ahve been successful with forwards in the past. 

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