Unable to control the last 2 unit of the led

[kenken64]

This is my code

import board
import neopixel
import os
import time

ORDER = neopixel.RGB

# GPIO pin 18 with 8 addressable leds
pixels = neopixel.NeoPixel(board.D18, 10, brightness=0.5, auto_write=False, pixel_order=ORDER)

# initialize all the env variables
BLINK_FEVER_FILE = os.getenv("BLINK_FEVER_FILE")
PROJ_DIR = os.getenv("PROJ_DIR")

# control the led strip off all the individual leds
def lightsOff():
    pixels.fill((0, 0, 0))

# control the led strip turn it to red all the individual leds
def lighUp():
    pixels.fill((255, 0, 0))

# control the led strip turn it to green all the individual leds
def noLighUp():
    pixels.fill((0, 255, 0))

while True:
    file = open(PROJ_DIR + BLINK_FEVER_FILE, "r")
    value = file.read()
    print(value)
    time.sleep(2)
    if value == '0':
        ightsOff()

    if value == '1':
        lighUp()

    if value == '2':
        noLighUp()
    pixels.show()

[dhalbert]

Controlling only 3/4 of the NeoPixels would happen if you are trying to control RGBW NeoPixels as RGB. It sounds like your strip is RGBW (perhaps you order that by mistake). They need to have 4 color values sent for each pixel, but you are sending only 3.

Try setting ORDER=neopixel.GRBW or RGBW, or omit the pixel_order argument and set bpp=4.

In the latest code, bpp is only used to set the order if it is not otherwise specified.

[kenken64]

I remove the order then everything is light up now :( pixels = neopixel.NeoPixel(board.D18, 8, brightness=0.5, auto_write=False)