LedPulse

The is a driver free LedBorg script
If you have installed the old LedBorg driver version see here for instructions on updating.



This example takes the getting started - lesson 5 script and adds a new dimension to the colour changing, brightness.
The new script pulses the LedBorg brightness between hue changes, giving a more complex colour sequence which shows how flexible LedBorg can be.

You can download the code directly to your Raspberry Pi using:
cd ~/ledborg
wget -O LedPulse.py http://piborg.org/downloads/LedPulse.py.txt
Or save the text file from the link on your Raspberry Pi as LedPulse.py

Make the script executable using
chmod +x LedPulse.py
and run using
sudo ./LedPulse.py

To stop the script press CTRL+C.

Full code listing

#!/usr/bin/env python

# Import library functions we need
import time
import wiringpi2 as wiringpi
wiringpi.wiringPiSetup()

# Setup software PWMs on the GPIO pins
PIN_RED = 0
PIN_GREEN = 2
PIN_BLUE = 3
LED_MAX = 100
wiringpi.softPwmCreate(PIN_RED,   0, LED_MAX)
wiringpi.softPwmCreate(PIN_GREEN, 0, LED_MAX)
wiringpi.softPwmCreate(PIN_BLUE,  0, LED_MAX)
wiringpi.softPwmWrite(PIN_RED,   0)
wiringpi.softPwmWrite(PIN_GREEN, 0)
wiringpi.softPwmWrite(PIN_BLUE,  0)

# A function to set the LedBorg colours
def SetLedBorg(red, green, blue):
    wiringpi.softPwmWrite(PIN_RED,   int(red   * LED_MAX))
    wiringpi.softPwmWrite(PIN_GREEN, int(green * LED_MAX))
    wiringpi.softPwmWrite(PIN_BLUE,  int(blue  * LED_MAX))

# A function to turn the LedBorg off
def LedBorgOff():
    SetLedBorg(0, 0, 0)

# Run until the user presses CTRL+C
print 'Press CTRL+C to exit'
while True:
    # Loop over a set of different hues:
    for hue in range(30):
        # Get hue into the 0 to 3 range
        hue /= 10.0
        # Decide which two channels we are between
        if hue < 1.0:
            # Red to Green
            red = 1.0 - hue
            green = hue
            blue = 0.0
        elif hue < 2.0:
            # Green to Blue
            red = 0.0
            green = 2.0 - hue
            blue = hue - 1.0
        else:
            # Blue to Red
            red = hue - 2.0
            green = 0.
            blue = 3.0 - hue
        # Build a list of levels from 1 to 100 to 0
        levels = range(1, 101)
        levels2 = range(100)
        levels2.reverse()
        levels.extend(levels2)
        # Loop over the levels
        for level in levels:
            # Get level into the 0 to 1 range
            level /= 100.0
            # Set the chosen colour and level
            SetLedBorg(red * level, green * level, blue * level)
            # Wait a short while
            time.sleep(0.01)