There is a way to use NeoPixels without root privileges ?

[MkLHX]

Hi there,

I'm try to use neopixels in an iot project.

I can run my script with

sudo python3 myscript.py

But i need to run neopixels as a python package from my script like

script_1.py

import time
import board
import neopixel

# Choose an open pin connected to the Data In of the NeoPixel strip, i.e. board.D18
# NeoPixels must be connected to D10, D12, D18 or D21 to work.
pixel_pin = board.D18

# The number of NeoPixels
num_pixels = 9

# 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=True,
                           pixel_order=ORDER)

COLORS = {
    'red': (255, 0, 0),  # red
    'green': (0, 255, 0),  # green
    'blue': (0, 0, 255),  # blue
    'white': (255, 255, 255),  # white
    'black': (0, 0, 0),  # black
}

LED_PINS = {
    'device_name_1': 0,
    'device_name_2': 1,
    'device_name_3': 2,
    'device_name_4': 3,
    'by': 4,
    'gpk': 5,
    'logo': 6,
    'ec': 7,
    'ph': 8,
}

def ctrl_led(led_num, color):
    """
    @Param led num => [0 to 8]
    @Param color list like (0, 255, 0)
    """
    pixels[led_num] = COLORS['black']
    time.sleep(0.125)
    pixels[led_num] = color

script_2.py

from script_1 import ctrl_led, LED_PINS, COLORS

if False is pump_is_running:
    ctrl_led(LED_PINS['ec'], COLORS['red'])
else:
    ctrl_led(LED_PINS['ec'], COLORS['blue'])

[caternuson]

Run script_2.py with sudo? You'll need root one way or the other: https://github.com/adafruit/Adafruit_CircuitPython_NeoPixel/issues/67#issuecomment-576454207

[MkLHX]

Ok can't pass over root privilege. So if i understand, i have to make a script.py and call it from python script by using subprocess.checkt_output() package or os.system() by passing sudo in these tools

[caternuson]

Easiest is to just have everything in script.py and call it with sudo. Otherwise you'll need to make sure whatever is trying to make the actual NeoPixel access call has root privilege somehow.

[MkLHX]

ok i manage by using my script like this:

from script_1 import COLORS, LED_PINS

if False is pump_is_running:
    subprocess.check_output(['sudo', 'python3', '-c', "import script_1; script_1.ctrl_led(%d, %s);" % (LED_PINS['ec'], COLORS['red'])])
else:
    subprocess.check_output(['sudo', 'python3', '-c', "import script_1; script_1.ctrl_led(%d, %s);" % (LED_PINS['ec'], COLORS['blue'])])

So i can write every method i need in script_1.py and i call theses where i need in the others script_x.py.

Thx for guiding me. I close the issue.