Antonio IW2OAZ wrote: > Ok I can assure the main voltage with a util like Nagios, I think isn't > necessary to test other points.
I do not think there are any voltage monitoring tools in Nagios. Nagios is a web interface to a number of monitoring "modules", but unless the PC motherboard has voltage monitoring built-in, and a module has been written to read that data from the motherboard -- Nagios will not monitor it. It can not do these things without "help". This is true of all the Nagios modules. Nagios is just the web interface portion, with a nice set of tools to monitor various things, but you'd have to look at their website and documentation to see if they meet your needs. To monitor voltage, an outside device may be necessary -- as mentioned, some UPS systems do that. Additionally for power, it's not as detailed a way to look at things, but you can just "ping" the equipment at the site. If the Gateway is up, and your firewall allows you to ping it remotely -- you can tell *something* has power. Next, if you log into the Gateway and ping your controller, you know the stack has power. Those are "easy" ways to tell, without building anything or integrating any monitoring devices at all. But they may not tell the whole picture. The Gateway going down can be because of power, or an OS crash, or... anything. You can add ping/monitoring of your firewall for example... if you can ping/login to your firewall remotely (if you find that appropriate security-wise), you know two devices have power... the firewall and the Gateway. A little applied knowledge of what you already have available to you for tools, might lead to you not wanting to make a large effort to monitor power directly with a custom or commercial device. > mmm...good question! For me is important check the room temperatue and > also the PA heatsink, but temperature sensor are necessary. Also > necessary is an A/D converter and the inject this signal in an USB > adapter for read data on Linux. Yes, you are correct. There are some hobby projects out there that feed thermistor data into Linux. They aren't related to Nagios or anything else, but Nagios has tools to integrate anything you can check at the command-line into the "pretty" web interface. That is it's most powerful feature. There are also commercial devices (again, the UPS or a power switch may already have this feature) that have both built-in and remote temperature sensors and their own web pages. The "tools" are there, but they have to be put together like building blocks to get to a "one web page" view of all of this sensor data. It would not be technically difficult, but it would be tedious and time-consuming. > This point of failure is important especially in thunderstorm season, > just for understand if the rpt don't appear to answer for a line problem > or because the antenna is broken...but finally, at this point is not > important known if the antenna is broken... Lightning is the only reason I've ever seen an antenna fail instantly, you're right. One friend found his fiberglass "stick" scattered all over the top of a mountain underneath the tower, and the more than 20 foot tall antenna fit nicely in a small basket. The repeater was equipped with a Polyphaser linked to the site-grounding system, and also had an isolator. No lightning got past the Polyphaser to the radio, and the isolator "saved" the repeater which was at such a high altitude it could often still hear users on the completely destroyed antenna. On another system, a friend started having reports that his repeater was so weak it was unusable, even when someone could key it -- so he went to the site, to find holes in the steel mast of a Decibel Products DB-408 where lightning had hit the tower and arced from the antenna mast to the tower legs. After removing the antenna with a tower crew and a crane and replacing it, the antenna (which has two large sections) was found to be welded together. Monitoring SWR wouldn't have helped in either case. The repeaters were instantly unusable by all but powerful mobile transmitters on high-gain antennas. It was very obvious something major had failed. Both had isolators, or their owners would have remotely commanded them off and headed for the sites, but both left them on in these two cases. > Thank you I've found and install it...now is up and running. Cool! > Well, for the installation are necessary some Linux basis and apache > knowledge, but the installation is very easy, the software is now in > testing. You've got it going! Great! An "experimenter's" attitude helps a lot! You'll have fun with it! > mmm...sounds good...in effect other me are 2 people available for a > second level support, I figure in my mind three levels of support where > the first level is the specialist intervention. Sounds about right -- not many clubs/organizations here have more than about 3 people REALLY working on things. Sad! Where are the technical hams?! Nate WY0X
