help, how to drive LED band & neohex with m5stick

pracio

i've connect to a led band with grove connector(the default GPIO32 for m5stick). i tried following code but nothing happend...

from m5stack import *
import time
from machine import Pin
from neopixel import NeoPixel

lcd.clear(lcd.WHITE)
lcd.text(lcd.CENTER, lcd.CENTER, "I'm Phelix", lcd.BLACK)

pin = Pin(32, Pin.OUT)
np = NeoPixel(pin, 15)
for i in range(15):
np[i] = (255,255,255)
np.write()

can someone please help me?

felmue

Hello @pracio

use RGB LED unit in UIFlow which result in this Python code:

from m5stack import *
from m5ui import *
from uiflow import *
import unit

setScreenColor(0x111111)
neopixel_1 = unit.get(unit.NEOPIXEL, unit.PORTA, 10)
neopixel_1.setColor(1, 0xff0000)

Thanks
Felix

ajb2k3

The Neohex has 37 RGB LEDS and the headband has 118 RGB LEDs.
the range should be set to 155 as there are now 155 LEDs connected together.
They should also be connected as below

However, this many LED's will cause power issues and you will need to build a power booster cable as shown in this guide.

https://youtu.be/7MP_eG3U2So