Minimum Value of Realtime Visualization

darthvader85 · 28 July 2017 11:09

Hello community,

I’m new to the community but I’m not new in emoncms & openergymonitor. I’m playing around with it for quite some time. At the Moment I’m trying to log my electricity data with a Raspberry Pi which is reading a 3Phase Meter over ModBus. This works pretty well but i have a Problem with the visualization of the Line Frequency. I want to make a realtime Visualization which shows the variation of it.

Here’s my Problem:

The Minimum of the Data Shown in the Realtime Vis ist 0 but it would be great if the Minimum could be changed to another value. I want my Realtime vis to show me the line frequency between 49.2 Hz and 50.8 Hz. Could anyone tell me what to change in the realtime.php?

Here is a link to my emoncms dashboard: http://emon.sklammer.at/Stefan/netzfreque

Thanks for your help,
Best regards,
Stefan

TrystanLea · 29 July 2017 16:51

Hello Stefan, the line you need to change is this one here:

github.com

emoncms/emoncms/blob/master/Modules/vis/visualisations/realtime.php#L117

    
      
                }
                if (data.length>0 && data[1] && data[1][0]<(start)) data.splice(0, 1);
                data.sort();
              }
           });
          }
          
          
function plot(){
              if(is_kw) {
                  var word = 'converted';
                  for(n in data) {
                      if(data[n] && data[n][1] && typeof data[n][2] === 'undefined' && typeof data[n][2] !== word) {
                          data[n][1] = data[n][1] / 1000;
                          data[n][2] = word
                      }
                  }
              }
            $.plot(graph,[{data: data, color: plotColour}],
            {
              canvas: true,
              lines: { fill: true },

from:

lines: { fill: true },

to:

lines: { fill: false },

That will remove the fill colour but allows the yaxis to resize automatically

darthvader85 · 4 August 2017 06:57

Thank you that was exactly what I was looking for.