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cheerlights.py
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cheerlights.py
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#!/usr/bin/env python
# -*- coding: latin-1 -*-
# Raspberry Pi Neopixel Cheerlights
# Author: David Bradway
#
# Uses NeoPixel Python library wrapper by Tony DiCola ([email protected])
# and NeoPixel/ rpi_ws281x library created by Jeremy Garff.
# This Raspberry Pi port is based on Arduino and Python code by Dave Koerner https://hexenwarg.wordpress.com
import time
import requests
from neopixel import *
# LED strip configuration:
LED_COUNT = 89 # CHANGEME! Number of LED pixels.
LED_PIN = 18 # GPIO pin connected to the pixels (must support PWM!).
LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
LED_DMA = 5 # DMA channel to use for generating signal (try 5)
LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
# I'm going to use a var to check if I've seen the color before
color = 'black'
cheerlights = color
# Define functions which animate LEDs in various ways.
def colorWipe(strip, color, wait_ms=50):
"""Wipe color across display a pixel at a time."""
for i in range(strip.numPixels()):
strip.setPixelColor(i, color)
strip.show()
time.sleep(wait_ms/1000.0)
def theaterChase(strip, color, wait_ms=50, iterations=10):
"""Movie theater light style chaser animation."""
for j in range(iterations):
for q in range(3):
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i+q, color)
strip.show()
time.sleep(wait_ms/1000.0)
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i+q, 0)
def wheel(pos):
"""Generate rainbow colors across 0-255 positions."""
if pos < 85:
return Color(pos * 3, 255 - pos * 3, 0)
elif pos < 170:
pos -= 85
return Color(255 - pos * 3, 0, pos * 3)
else:
pos -= 170
return Color(0, pos * 3, 255 - pos * 3)
def rainbow(strip, wait_ms=20, iterations=1):
"""Draw rainbow that fades across all pixels at once."""
for j in range(256*iterations):
for i in range(strip.numPixels()):
strip.setPixelColor(i, wheel((i+j) & 255))
strip.show()
time.sleep(wait_ms/1000.0)
def rainbowCycle(strip, wait_ms=20, iterations=5):
"""Draw rainbow that uniformly distributes itself across all pixels."""
for j in range(256*iterations):
for i in range(strip.numPixels()):
strip.setPixelColor(i, wheel(((i * 256 / strip.numPixels()) + j) & 255))
strip.show()
time.sleep(wait_ms/1000.0)
def theaterChaseRainbow(strip, wait_ms=50):
"""Rainbow movie theater light style chaser animation."""
for j in range(256):
for q in range(3):
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i+q, wheel((i+j) % 255))
strip.show()
time.sleep(wait_ms/1000.0)
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i+q, 0)
def historyChase(strip, light_history, wait_ms=50):
"""Wipe last three Cheerlights colors across display ten pixels at a time."""
for q in range(3):
for head in range(strip.numPixels()+10):
if head < strip.numPixels():
strip.setPixelColor(head, light_history[q])
tail = head - 10
if tail >= 0:
strip.setPixelColor(tail, Color(0,0,0))
strip.show()
time.sleep(wait_ms/1000.0)
# Main program logic follows:
if __name__ == '__main__':
# Create NeoPixel object with appropriate configuration.
strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT)
# Intialize the library (must be called once before other functions).
strip.begin()
# Introduce a list for keeping the last three Cheerlight Colors
light_history = [Color(0, 0, 0),Color(0, 0, 0),Color(0, 0, 0)];
print 'Press Ctrl-C to quit.'
while True:
# Read the thingspeak feed to get the current color
try:
cheerlights = requests.get('http://api.thingspeak.com/channels/1417/field/1/last.json').json()['field1']
except:
pass
if cheerlights != color:
#New color, do stuff
if cheerlights == 'red':
match = True
newColor = Color(255, 0, 0)
elif cheerlights == 'green':
match = True
newColor = Color(0, 255, 0)
elif cheerlights == 'blue':
match = True
newColor = Color(0, 0, 255)
elif cheerlights == 'purple':
match = True
newColor = Color(102, 51, 204)
elif cheerlights == 'cyan':
match = True
newColor = Color(0, 255, 255)
elif cheerlights == 'magenta':
match = True
newColor = Color(255, 0, 255)
elif cheerlights == 'yellow':
match = True
newColor = Color(255, 255, 0)
elif cheerlights == 'orange':
match = True
newColor = Color(255, 153, 0)
elif cheerlights == 'pink':
match = True
newColor = Color(255, 192, 203)
elif (cheerlights == 'white' or cheerlights == 'warmwhite' or cheerlights == 'oldlace'):
match = True
newColor = Color(255, 255, 255)
elif (cheerlights == 'black' or cheerlights == 'off'):
match = True
newColor = Color(0, 0, 0)
else:
match = False
print 'non-match!'
if match == True:
match = False
#theaterChase(strip, newColor)
#colorWipe(strip, newColor)
print cheerlights
# remove oldest color in history
light_history.pop()
# add new color to top of history
light_history.insert(0,newColor)
# print color list in decimal integer format
print light_history
# chase the history across the lights
historyChase(strip, light_history)
color = cheerlights
time.sleep(16)
# Theater chase animations. (Use with above or use randomly)
#theaterChase(strip, Color(127, 127, 127)) # White theater chase
#theaterChase(strip, Color(127, 0, 0)) # Red theater chase
#theaterChase(strip, Color( 0, 127, 0)) # Green theater chase
# Rainbow animations.
#rainbow(strip)
#rainbowCycle(strip)
#theaterChaseRainbow(strip)
time.sleep(0.1)