minimal test for NeoPixels with Linux / CircuitPython

neopixel_minimal_test.py

# minimal test for NeoPixels on Raspberry Pi
import time
import board
import neopixel


num_pixels = 2

pixels = neopixel.NeoPixel(
    board.D18,
    num_pixels,
    brightness=1.0,
    auto_write=False,
    pixel_order=neopixel.RGBW)


while True:
    print('red')
    pixels.fill((255, 0, 0, 0))
    pixels.show()
    time.sleep(1)

    print('green')
    pixels.fill((0, 255, 0, 0))
    pixels.show()
    time.sleep(1)

    print('blue')
    pixels.fill((0, 0, 255, 0))
    pixels.show()
    time.sleep(1)

    print('white')
    pixels.fill((0, 0, 0, 255))
    pixels.show()
    time.sleep(1)

    print('rgb full')
    pixels.fill((255, 255, 255, 0))
    pixels.show()
    time.sleep(1)

    print('rgbw 10')
    pixels.fill((10, 10, 10, 10))
    pixels.show()
    time.sleep(1)

    print('rgb 1, w 100')
    pixels.fill((1, 1, 1, 100))
    pixels.show()
    time.sleep(1)

    print('rgb 1, w 255')
    pixels.fill((1, 1, 1, 255))
    pixels.show()
    time.sleep(1)

    print('b 1, w 100')
    pixels.fill((0, 0, 1, 100))
    pixels.show()
    time.sleep(1)