SVG Dashboard

by luca
14 comments

SVG template

The first step to create our dinamic dashboard is to draw a template in SVG. Although there are several drawing programs which can manage that format, I recommend Inkscape, which is opensource and a portable version is available too.

It’s very important to draw using the grid (menu View – Grid):

First, let’s draw the “static” part of our dashboard: in my example the dashboard will be composed by a thermometer and a text information about actual temperature. If you can’t use Inkscape, on Internet you can find very good tutorials (es. 1 and 2) about it.

While drawing the thermometer, it’s important to find out the number of units which correspond to one degree (in my example 1 degree = 5 units):

Add to the drawing the elements which change while temperature changes: a rectangle for the liquid in the thermometer and the text. It’s not important at the moment the value you choose:

Open XML editor (menu Edit – XML Editor…):

If you select an element, you can show its properties in the XML source.
Choose the rectangle and try to change height property (after having changed it, confirm with CTRL+ENTER):

If rectangle grew in the wrong direction (to the bottom), use Object – Flip Vertical to rotate it 180°:

Change id property to give a more friendly name to the object (for example temp_level):

Choose the text and change id property too (for example temp_value):

At last, resize the “page” of our drawing: File menu – Document properties…, open Resize page to content… and click Resize page to drawing or selection. If you want, you can add some margin around the drawing:

In the next page we’re going to learn how to make our SVG file dynamic using PHP…

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Lucio Saturday June 30th, 2012 - 04:51 PM

Gentile Luca Dentella,
ho trovato interessantissimo il suo tutorial che riguarda il dashboard svg. Le chiederei gentilmente, se possibile, di fornirmi un esempio per visualizzare in forma grafica sul browser i valore di tensione letti sugli ingressi analogici dell’arduino uno in forma vu meter lineare (tipo il suo termometro) oppure classico a lancetta.
Ringraziando anticipatamente, Le porgo distinti saluti.
lucio.ra@libero.it

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A MacLeod Monday May 6th, 2013 - 10:24 PM

Thanks for taking the time to document this, I used it as a basis for my own arduino project (a web-connected heating oil level monitor.)

Getting a nice SVG-based level indication turned out to be easier than I had feared… strangely, getting it to send warning emails was trickier!

http://s230.photobucket.com/user/macleodaj/media/Junk/oil_level_gauge.jpg.html

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luca Tuesday May 7th, 2013 - 08:19 AM

Hi! Thanks for your feedback and great SVG web interface!

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Mosesliete Monday April 16th, 2018 - 11:05 PM

Wonderful site, how do u get all this information?I’ve read a few posts on your site and I like your writing style. Thanks a million, keep up the great work.

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