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wsleds.py
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wsleds.py
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import os, time, json, colorsys, zmq, math
from rpi_ws281x import ws, Adafruit_NeoPixel
# LEDs hardware config:
LED_COUNT = 299 # Number of LED pixels.
LED_PIN = 13 # GPIO pin connected to the pixels (18 uses PWM!).
LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
LED_DMA = 10 # DMA channel to use for generating signal (try 10)
LED_BRIGHTNESS = 160 # Set to 0 for darkest and 255 for brightest
LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
LED_CHANNEL = 1 # Set to 1 for GPIOs 13, 19, 41, 45 or 53
LED_MODE_GRB = True # Set color mode RGB (False) or GRB (True)
rainbow_table = []
def run():
global rainbow_table
for i in range(360):
rainbow_table.append(color_hsv(i, 100, 40))
context = zmq.Context()
receiver = context.socket(zmq.PULL)
receiver.bind("tcp://127.0.0.1:5593")
strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
strip.begin()
ws_state = get_state()
ws_scenes = get_scenes()
ws_modes = get_modes()
wait_ms = 100
timer_effect = 0
timer_state = 0
offset = 0
mod = 0
value = 0
while(True):
# Update scene
if timer_state >= 200:
try:
m = receiver.recv_string(zmq.NOBLOCK)
except zmq.ZMQError as e:
if e.errno == zmq.EAGAIN:
pass
else:
if m == "UPDATE":
ws_state = get_state()
ws_scenes = get_scenes()
offset = 0
mod = 0
value = 0
timer_effect = wait_ms
timer_state = 0
# Generate effect
if timer_effect >= wait_ms:
if ws_state['enable'] == 1:
for i in ws_scenes['scenes']:
if i['id'] is ws_state['scene']:
m = i['mode_id']
wait_ms = i['wait_ms']
if i['def'] is True:
colors = i['colors']
# Mode 0 (static)
if m is 0:
if i['def'] is True:
cycle(strip, colors)
else:
rainbow(strip)
# Mode 1 (cyclic)
elif m is 1:
if i['def'] is True:
offset = (offset + 1) % LED_COUNT
cycle(strip, colors, offset)
else:
offset = (offset + 1) % LED_COUNT
rainbow(strip, offset)
# Mode 2 (fading)
elif m is 2:
if i['def'] is True:
num = len(colors)
if mod is 0:
value += 1
if value is colors[offset]['v']:
mod = 1
elif mod is 1:
value -= 1
if value is 0:
offset = (offset + 1) % num
mod = 0
fading(strip, colors, offset, value)
# Clear strip if enable is 0
else:
clear(strip)
wait_ms = 100
timer_effect = 0
time.sleep(1/1000.0)
timer_effect += 1
timer_state += 1
def get_state():
"""Read state.json file"""
f = open("json/state.json", "r")
st = json.load(f)
f.close()
return st
def get_scenes():
"""Read scenes.json file"""
f = open("json/scenes.json", "r")
sc = json.load(f)
f.close()
return sc
def get_modes():
"""Read modes.json file"""
f = open("json/modes.json", "r")
mo = json.load(f)
f.close()
return mo
def color_hsv(h,s,v):
"""Convert HSV to RGB"""
rgb = colorsys.hsv_to_rgb(h/360.0, s/100.0, v/100.0)
return color_rgb(int(rgb[0] * 255), int(rgb[1] * 255), int(rgb[2] * 255))
def color_rgb(r, g, b):
"""Convert RGB to int"""
if LED_MODE_GRB is True:
return ((g << 16) | (r << 8) | b)
else:
return ((r << 16) | (g << 8) | b)
def clear(strip, wait_ms=0):
"""Clear strip"""
col = [{"h": 0, "s": 0, "v": 0}]
cycle(strip, col)
def rainbow(strip, offset=0):
"""Draw rainbow that uniformly distributes it across all pixels"""
for i in range(strip.numPixels()):
strip.setPixelColor(i, rainbow_table[int((i+offset)*360.0/LED_COUNT)%360])
strip.show()
def cycle(strip, colors, offset=0):
"""Draw that uniformly distributes it across all pixels"""
num = len(colors)
for i in range(strip.numPixels()):
c = colors[(i + offset) % num]
strip.setPixelColor(i, color_hsv(c['h'], c['s'], c['v']))
strip.show()
def fading(strip, colors, offset, value):
"""Draw that fades across all pixels at once"""
for i in range(strip.numPixels()):
j = colors[offset]
strip.setPixelColor(i, color_hsv(j['h'], j['s'], value))
strip.show()
if __name__ == "__main__":
run()