Introducing the rpi_led_bargraph gem

Example

require 'rpi_led_bargraph'

g = RPiLedBarGraph.new(%w(26 19 13 6 5 11 20 16 4 12))

# a quick self test
g.on
sleep 5
g.off

# using the bar graph as a progress meter, just enter a percentage
g.progress 20, :blink
sleep 2
g.progress 40, :blink

Options

Initialize options:

• wait: defaults to 0.1s for animating the illumination of bars for methods on() and off()
• dir: defaults to :ltr (left-to-right)
• invert: default to false. Used by the progress() method, 0% progress will illuminate all LEDs, while 100% progress would turn all the LEDs off.

Progress options:

• blink: by default it is set to false

Resources

• rpi_led_bargraph[rubygems.org]