Weatherbug XML API script and templates

Mondo1287 · Joined: 11 Oct 2006 Posts: 15

The following is a simple implementation of WeatherBug's API, and Cacti to create some basic weather graphs. You'll need to register with WeatherBug to receive an "API Code". http://apireg.weatherbug.com/defaultAPI.aspx

This is probably not bug free, but seems to work well. Future updates will likely include more data from WeatherBug's API calls, such as adding predicted highs and lows to the temperature graph.

Note: I am in no way affiliated with WeatherBug.

Open the README file for further instructions.

I was hoping to create something a little easier to work with than the other cacti weather graphing solutions. Comments and criticisms are welcome.

Edit: You may need to edit php.ini and set allow_url_fopen = on
e.g. /etc/php/cli-php5/php.ini

I updated the graph templates and data template to handle negative numbers.

Edit: Added in TheWitness's modified polling script.

Mondo1287 · Joined: 11 Oct 2006 Posts: 15

I updated the templates to handle negative numbers. If you already downloaded them, import the updated templates (it will just update the existing ones). Then navigate to <cacti path>/rra/ and run

rrdtool tune <rrd filename> --minimum DewPoint:-200
rrdtool tune <rrd filename> --minimum Temperature:-200

You can find the rrd filename by clicking Data Sources, then choose WeatherBug API DS.

MaffooClock · Joined: 12 Jul 2006 Posts: 17

I like this better than the other Weatherbug script, especially since this uses an XML API.

Cuerrently, I have the dreaded 'nan' issue with this, however, running the wbugxml.php script at the command-line produced values.

Regardless, once I figure out what my problem is, I'd like to tweak this more and get as much data from the API graphed as possible (as long as you don't mind, of course).

I'll post more feedback as I come across new issues/ideas...

MaffooClock · Joined: 12 Jul 2006 Posts: 17

I spent HOURS troubleshooting the 'nan' issue and I didn't get anywhere. (By the way, I should mention that I am very proficient with Linux, PHP, MySQL, and Cacti.)

I noticed that I had not followed your instructions for installing the templates, so I removed ALL associated graph templates, data templates, data sources, graphs -- everything. I then re-installed all of this by following your instructions precisely. At that point, the graphs weren't being drawn at all. I found that because they are not associated with any hosts, they are never placed in the poller cache. Am I right about this? When I created a dummy host and re-associated all of the data sources and graphs to the new dummy host, the poller cache showed an entry, and the graphs were being generated (but still showing 'nan values').

I should mention that I created a test database for cacti aside from my operational cacti database so that I could tinker with this more. So, essentially, I have a brand new cacti installation, so all of these symptoms cannot be attributed to database corruption or any other misconfiguration.

As the author of these script/templates, I'm certain they work for you. But there's something you're missing (I think), especially when you wrote the README. I hope you'll have some time to help me with this, and I'll be happy to contribute any way I can to making this work for everyone.

But, hopefully I am just stupid and have missed something, and someone will point it out, call me an idiot, and then all will be well.

MaffooClock · Joined: 12 Jul 2006 Posts: 17

Well, at this point, it seems that I have fixed my graphs. I removed all graphs, data sources, input methods, and everything else. Then, I installed everything according to the README, but then created a dummy host and assigned the data sources and graphs to that host. Now I have data in my graphs.

apperrault · Posted: Tue Mar 20, 2007 3:37 pm Post subject:

Question, is there a way to setup multiple locations? I have 5 across the country, and one in Canada, and I would love to be able to add all of my sites to my Weather graph group.

Thanks much

app

Mondo1287 · Joined: 11 Oct 2006 Posts: 15

MaffooClock, sorry for the late reply. Have you checked to ensure the script is working? Try running wbugxml.php from a shell prompt and make sure there are no errors. It should just output the weather values. I haven't looked at this in quite some time, so I'll try and do a clean install following my instructions and see if there's something I left out.

Mondo1287 · Joined: 11 Oct 2006 Posts: 15

I just did a fresh install of Cacti and I didn't have any issues with my script or templates. I did, however, run into a couple of problems I seem to usually have when installing Cacti. Permission problems with the rra and log folders are common. For testing purposes just do

Mondo1287 · Joined: 11 Oct 2006 Posts: 15

cacti_user_md · Joined: 19 Apr 2007 Posts: 2

Has anyone else had any problems with gaps in the Weatherbug graphs? The problem seems to be with the Weatherbug server and not Cacti. The gaps appear much more frequently during the day than at night, so it might be caused by heavy traffic to Weatherbug. Just looking for ideas.

Mondo1287 · Joined: 11 Oct 2006 Posts: 15

I have the same gaps in my graphs so it must be their server. There is usually an occasional gap but this week there seems to be a ton of them.

tstrathdee · Joined: 17 May 2007 Posts: 3

After installing, I wasn't getting any data on my graphs so I tried to run wbugxml.php from the command line. I am getting the following error message

Fatal error: Call to a member function children() on a non-object in /var/www/cacti/scripts/wbugxml.php on line 10

Any ideas on what might be causing this?
Thanks.

Mondo1287 · Joined: 11 Oct 2006 Posts: 15

It may be a problem with PHP not having simplexml support compiled in, but I would assume it would fail on line 7 if that was the case. It sounds like it's not loading the xml data from their website. Comment out lines 10-24, and then add

tstrathdee · Joined: 17 May 2007 Posts: 3

TheWitness · Posted: Mon May 21, 2007 6:05 am Post subject:

All,

Reviewing Mondo1287's script, I noted an issue relative to the outputing of the script results. The method chosen will cause problems with Cactid. Therefore, I have revised the code attached.

TheWitness