My dashboard code. You need a layout file such as this one to load a sample set: https://gist.github.com/bkuri/6966975

main.py

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

from kivy.animation import Animation
from kivy.app import App
from kivy.clock import Clock
from kivy.lang import Builder
from kivy.properties import ObjectProperty, StringProperty
from kivy.uix.floatlayout import FloatLayout
from gauge import Gauge

# only used when testing
from random import random

EASING = 'linear'
LAYOUT = 'no_rings'
TIME = 1./10.

class Dashboard(FloatLayout):
  gauges = ObjectProperty(None)

  def __init__(self, **kwargs):
    super(Dashboard, self).__init__(**kwargs)

  def test(self, *args):
    for gauge in self.gauges:
      value = round(random() * gauge.max)
      anim = Animation(value=value,duration=TIME,t=EASING)
      anim.start(gauge)

class MainApp(App):
  def build(self):
    dash = Dashboard()
    Clock.schedule_interval(dash.test, TIME)
    return dash

if __name__ == "__main__":
  try:
    Builder.load_file('lib/layouts/%s.kv' % LAYOUT)
  except e:
    print 'error loading layout "%s"' % LAYOUT
  finally:
    MainApp().run()

You'll need a kv file like the following to load the test: https://gist.github.com/bkuri/6966975