unicornhat-cheerlights.py

#!/usr/bin/env python

import time
import unicornhat as unicorn
import urllib

unicorn.set_layout(unicorn.AUTO)
unicorn.rotation(0)
unicorn.brightness(0.5)
width,height=unicorn.get_shape()

# Setup parameters
cheerlightsUrl = 'http://api.thingspeak.com/channels/1417/field/1/last.txt'
#            Name           Red     Green   Blue
colourMap = {'red':         (255,   0,    0),
             'green':       (0,   255,    0),
             'blue':        (0,   0,    255),
             'cyan':        (0,   255,    255),
             'white':       (255,   255,    255),
             'warmwhite':   (255,   244,    229),
             'purple':      (128,   0,    128),
             'magenta':     (255,   0,    255),
             'yellow':      (255,   255,    0),
             'orange':      (255,   165,   0),
             'pink':        (255,   192,   203),
             'oldlace':     (255,   255,    200)}

while True:
    try:                                                # Attempt the following:
        cheerlights = urllib.urlopen(cheerlightsUrl)        # Open cheerlights file via URL
        colourName = cheerlights.read()                     # Read the last cheerlights colour
        cheerlights.close()                                 # Close cheerlights file
        if colourMap.has_key(colourName):                   # If we recognise this colour name then ...
            red, green, blue = colourMap[colourName]            # Get the UnicornHAT colour to use from the name
        else:                                               # Otherwise ...
            print 'Unexpected colour "' + colourName + '"'      # Display the name we did not recognise
            red, green, blue = (0, 0, 0)                  # Use the colour of black / off
        print 'colour= "' + colourName + '"'
        unicorn.set_all(red, green, blue)
        unicorn.show()
    except:
        pass
    finally:
        time.sleep(5)