LedBorg examples ported to Ruby. All examples are 1/1 ported from the Python orginals @ http://piborg.org/ledborg/examples

cheerlights.rb

#!/usr/bin/env ruby

# Load library functions we want
require 'open-uri'

# Setup paramters
cheerlightsUrl = "http://api.thingspeak.com/channels/1417/field/1/last.txt"
colourMap = {  "red" => "200",
		"green" => "020",
		"blue" => "002",
		"cyan" => "022",
		"white" => "111",
		"warmwhite" => "222",
		"purple" => "102",
		"magenta" => "202",
		"yellow" => "220",
		"orange" => "210"
}

# Loop indefinitely
while true
	begin								# Catch errors
		colourName = open(cheerlightsUrl) { |io| io.read }	# Read cheerlights file via URL
		if colourMap.include? colourName			# If we recognise this colour name then ...
			ledBorgColour = colourMap[colourName]		# Get the LedBorg colour to use from the name
		else							# Otherwise ...
			puts "Unexpected colour #{colourName}"		# Display the name we did not recognise
			ledBorgColour = "000"				# Use the colour of black / off
		end

		ledBorg = open('/dev/ledborg', 'w')			# Open the LedBorg driver
		ledBorg.write(ledBorgColour)				# Set LedBorg to the new colour
		ledBorg.close						# Close the LedBorg driver
	rescue
	end								
	sleep(1)							# Wait for 1 second 
end

random-colours.rb

#!/usr/bin/env ruby

# Loop indefinitely
while true
	red = rand(2)				# Generate a value for red between 0 and 2 inclusive
	green = rand(2)				# Generate a value for green between 0 and 2 inclusive
	blue = rand(2)				# Generate a value for blue between 0 and 2 inclusive
	colour = "#{red}#{green}#{blue}"	# Create a text string of the form "RGB" from our random values
	ledBorg = open('/dev/ledborg', 'w')     # Open the LedBorg device for writing to
	ledBorg.write(colour)                   # Write the colour string to the LedBorg device
	ledBorg.close	                        # Close the LedBorg device
	sleep(1)				# Wait for 1 second
end

sequence.rb

#!/usr/bin/env ruby

# Setup our sequence list
colours = ["200", "210", "110", "120", "020", "021", "011", "012", "002", "102", "101", "201"]

# Loop indefinitely
while true
  colours.each do |colour|			# For each colour in the list in order...
		ledBorg = open('/dev/ledborg', 'w')	# Open the LedBorg device for writing to
		ledBorg.write(colour)			# Write the colour string to the LedBorg device
		ledBorg.close				# Close the LedBorg device
		sleep(1)				# Wait for 1 second 
	end
end

user-colors.rb

#!/usr/bin/env ruby

# Function to get a keypress without showing text on screen
# this function is a bit more complex then the rest of the
# example, understanding it is a more advanced topic
def getKey
	begin
		system("stty raw -echo")
		str = STDIN.getc
	ensure
		system("stty -raw echo")
	end
	str.chr
end

# Display the options to the user as a menu
puts "+-------------------------------+"
puts "|            LedBorg            |"
puts "+-------------------------------+"
puts "|                               |"
puts "|    R      Cycle red           |"
puts "|    G      Cycle green         |"
puts "|    B      Cycle blue          |"
puts "|    0      Set all off         |"
puts "|    1      Set all 50%         |"
puts "|    2      Set all 100%        |"
puts "|    I      Invert all channels |"
puts "|                               |"
puts "|    Q      Quit                |"
puts "|                               |"
puts "+-------------------------------+"
puts

# Loop indefinitely
while true
	# Get the next user command
	command = getKey		# Read the next command from the user
	
	# Read the current colour from the LedBorg device
	oldColour = open('/dev/ledborg', 'r').read	# Read the entire contents of the LedBorg file (should only be 3 characters long)
	red = oldColour[0].to_i				# Get the red setting from the colour string
	green = oldColour[1].to_i			# Get the green setting from the colour string
	blue = oldColour[2].to_i			# Get the blue setting from the colour string

	# Process the users command
	command.upcase!					# Convert the command to upper case (we do not care what case it is)
	if command == "R"				# If the user pressed R
		red += 1					# Increase red by 1
		red = 0 if red > 2				# Set back to 0 if green is now above 100%
	elsif command == "G"				# If the user pressed G ...
		green += 1					# Increase green by 1
		green = 0 if green > 2				# Set back to 0 if green is now above 100%
	elsif command == "B"				# If the user pressed B...
		blue += 1					# Increase blue by 1
		blue = 0 if blue > 2				# Set back to 0 if blue is now above 100%
	elsif command == "0"				# If the user pressed B...
		red = 0						# Set red to off
		green = 0					# Set green to off
		blue = 0					# Set blue to off
	elsif command == "1"				# If the user pressed 1...
		red = 1						# Set red to 50%
		green = 1					# Set green to 50%
		blue = 1					# Set blue to 50%
	elsif command == "2"				# If the user pressed 2...
		red = 2						# Set red to 100%
		green = 2					# Set green to 100%
		blue = 2					# Set blue to 100%
	elsif command == "I"				# If the user pressed I...
		red = 2 - red					# Set red to its inverse
		green = 2 - green				# Set green to its inverse
		blue = 2 - blue					# Set blue to its inverse
	elsif command == "Q"				# If the user pressed Q...
		break						# Jump out of the while loop
	elsif command == "\3"				# If the user pressed CTRL+C...
		break						# Jump out of the while loop
	else						# If the user pressed anything else
		puts "Unknown option #{command}"		# Print an error message
		next						# Jump back to the start of the while loop (skip setting the colour)
	end

	newColour = "#{red}#{green}#{blue}"		# Create a text string of the form "RGB" from our new values
	ledBorg = open('/dev/ledborg', 'w')		# Open the LedBorg device for writing to
	ledBorg.write(newColour)			# Write the new colour string to the LedBorg device
	ledBorg.close					# Close the LedBorg device
end

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