<![CDATA[Neopixel connected to EXT.IO2 problem]]>Hello, my first post here. I am trying to use a Neopixel strand connected to an Ext.I/O2 module (connected to M5StickC2). I can see that I have a Neopixel option for port usage, but no way to write to them. This is a bit of code that let me just light the first pixel:

import os, sys, io
import M5
from M5 import *
from hardware import *
from unit import EXTIO2Unit



i2c0 = None
extio2_0 = None
rgb_0 = None


def setup():
  global i2c0, extio2_0, rgb_0

  M5.begin()
  i2c0 = I2C(0, scl=Pin(33), sda=Pin(32), freq=100000)
  extio2_0 = EXTIO2Unit(i2c0)
  extio2_0.set_config_mode(0, 4)


def loop():
  global i2c0, extio2_0, rgb_0
  M5.update()
  extio2_0.write_rgb_led(0, 0xff0a14)

Any idea to for further ? Thanks,

]]>https://community.m5stack.com/topic/7086/neopixel-connected-to-ext-io2-problemRSS for NodeSun, 17 May 2026 08:34:58 GMTFri, 13 Dec 2024 18:52:05 GMT60<![CDATA[Reply to Neopixel connected to EXT.IO2 problem on Fri, 13 Dec 2024 20:46:20 GMT]]>Hello @Marc-SKIL

unit EXT.IO2 can only control one (1) RGB LED per output. So what you get is correct. Have a look at the protocol here.

Thanks
Felix

]]>https://community.m5stack.com/post/27453https://community.m5stack.com/post/27453Fri, 13 Dec 2024 20:46:20 GMT