conflict between cpx and neopixel

[pvanallen]

This code produces an error. With release adafruit-circuitpython-circuitplayground_express-3.0.0.uf2

import board
import neopixel
from adafruit_circuitplayground.express import cpx
pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, brightness=.2)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "cpxneo.py", line 4, in <module>
  File "neopixel.py", line 91, in __init__
ValueError: Pin PB23 in use

[kattni]

neopixel is initialised in the Circuit Playground Express cpx lib, so you can't import both. If you want to use NeoPixels with the cpx lib, try using cpx.pixels. Otherwise, you'll need to use the individual libraries you wish to use to be able to use neopixel separately.

[pvanallen]

Ah, got it, thanks. Sorry, I was referencing this code which I guess is out of date now.

For completeness, working code:

import time
from adafruit_circuitplayground.express import cpx
cpx.pixels.brightness = 0.3
cpx.pixels.fill((127, 0, 0))
cpx.pixels.show()

while True:
    x, y, z = cpx.acceleration
    print(x, y, z)
    time.sleep(0.1)

[pvanallen]

Also, this Adafruit example uses the same approach combining cpx and neopixel libs and doesn't work. It would be good to get that updated:

https://learn.adafruit.com/ufo-circuit-playground-express/code-the-ufo-with-circuitpython

[kattni]

@pvanallen There is a feedback link on the guide page, if you could leave the feedback there regarding the code, that would be greatly appreciated!

[pvanallen]

Yes, saw that after my post and commented a few minutes ago, referencing this issue.

[ghostdog3]

Hello,

I just ran into this same issue while trying to leverage the code on this adafruit guide. https://learn.adafruit.com/circuitplayground-morse-code-flasher-makecode-circuit-python/circuitpython

I submitted some feedback on the website itself already but in case anyone else runs in this issue, here is what I did (special thanks to Kattni above who suggested this):

pixels = cpx.pixels
pixels.fill((0, 0, 0))
pixels.show()