Graphs

The graph is live, using live data from your feeds EJ, I hope you don't mind, so no, it's not a Photoshop job.  

I take it that you haven't been able to get a png graph with multi feeds on, if you have, do you have the code for it?

To get better resolution, I think I could get the JSON data from Pachube and then feed that in a graph.  With the graph above Google and Pachube do all the work.

What I'll do is continue with the graph type above, it should be fairly easy and help me learn how to put them together.

Once that is completed, I should have a better understanding about them and be better equiped to select data for a specific time period, one step at a time I guess.

Does anyone have a feel for the maximum number of feeds per graph, I would suggest 4, otherwise I guess they could start to look a bit busy, any thoughhts?

Is there anything else worth considering now?

OK, I've now got this working in a form that I'd be happy for someone to test.  Just so you know, you can pick any pachube feeds you like, as long as they're public, pick the name and colour of each feed, I've limited it to 6 feeds for now.  I can give instructions on how to test it without reflashing your existing firmware.  If you're interested send me a message.

I haven't implemented a method of getting graphs at a higher resolution, ie datapoints for every 5 minutes, I know EJ is keen for this, and I would prefer it myself, but I've started simple so that I can build up, I just don't know enough about getting the data out of Pachube and formatting it yet, more reading to do.

I've been looking at other methods for implementing these types of graphs, and your suggestions have been followed up with lots of reading.  

My favourite for now is Cacti, but Brett has already pointed out why this might be difficult, I guess we'll all have to wait for the Rasberry Pi and Brett to get back in the saddle.