WS2812 datasheet(87/98 Pages) RASPBERRY-PI

87 / 98 page

That's all there is to getting started with CircuitPython and NeoPixel LEDs!

Full Example Code

import time

import board

import neopixel

# On CircuitPlayground Express, and boards with built in status NeoPixel -> board.NEOPIXEL

# Otherwise choose an open pin connected to the Data In of the NeoPixel strip, i.e. board.D1

pixel_pin = board.NEOPIXEL

# On a Raspberry pi, use this instead, not all pins are supported

# pixel_pin = board.D18

# The number of NeoPixels

num_pixels = 10

# The order of the pixel colors - RGB or GRB. Some NeoPixels have red and green reversed!

# For RGBW NeoPixels, simply change the ORDER to RGBW or GRBW.

ORDER = neopixel.GRB

pixels = neopixel.NeoPixel(

pixel_pin, num_pixels, brightness=0.2, auto_write=False, pixel_order=ORDER

)

def wheel(pos):

# Input a value 0 to 255 to get a color value.

# The colours are a transition r - g - b - back to r.

if pos < 0 or pos > 255:

r = g = b = 0

elif pos < 85:

r = int(pos * 3)

g = int(255 - pos * 3)

b = 0

elif pos < 170:

pos -= 85

r = int(255 - pos * 3)

g = 0

b = int(pos * 3)

else:

pos -= 170

r = 0

g = int(pos * 3)

b = int(255 - pos * 3)

https://learn.adafruit.com/adafruit-neopixel-uberguide

Page 90 of 101

WS2812 Datasheet(PDF) 87 Page - Raspberry Pi Holdings PLC