Hi.
Did you flash the ESP32 with MicroPython firmware?
It looks like you have selected the wrong interpreter.
Which IDE are you using?
Is the ESP32 connected to your computer and “seen” by the IDE?
Regards,
Sara

This code is from: embedded-things.blogspot.com

commnted code is yours and doesn’t work either.

Win 11/64; i7 9700K; 16GB RAM; Thonny 4.1.7; Python 3.10.11; Tk 8.6.13; MicroPython v1.26.1; ESP32-C3

import machine
from machine import Pin
import neopixel
import time

N = 1
P = 8

onboard_pixel = neopixel.NeoPixel(board, NEOPIXEL, 1, brightness=0.5, auto_write=False)

np = neopixel.NeoPixel(machine, Pin(8), 1)

PURPLE = (115, 58, 201)

while True:
np[0] = (0, 0, 0)
np.write()
time.sleep(2)
np[0] = (255, 0, 0)
np.write()
time.sleep(2)
np[0] = (0, 255, 0)
np.write()
time.sleep(2)
np[0] = (0, 0, 255)
np.write()
time.sleep(2)
np[0] = (PURPLE)
np.write()
time.sleep(2)

# onboard_pixel.fill(PURPLE) = Red, Green, Blue
# onboard_pixel.show()
# time.sleep(1)
# onboard_pixel.fill((0,255,0))
# onboard_pixel.show()
# time.sleep(1)
# onboard_pixel.fill((115,58,201)) # purple
# onboard_pixel.show()
# time.sleep(3)


yields: %Run -c $EDITOR_CONTENT

MPY: soft reboot
Traceback (most recent call last):
File “”, line 11, in
File “neopixel.py”, line 1, in init
TypeError: unsupported types for mul: ‘Pin’, ‘int’

Looking at pythontutor.com shows:
ImportError: machine not found or not supported
Only these modules can be imported:
future, abc, array, bisect, calendar, cmath,
collections, copy, datetime, decimal, doctest, fractions,
functools, hashlib, heapq, io, itertools, json,
locale, math, operator, pickle, pprint, random,
re, string, types, typing, unittest

The problem was completely my fault. The UART to Serial driver was installed when I was using Arduino C++ and it appears that after re-flashing the ESP8266 with Micro Python I should have reinstalled the driver. Once I did that everything began working fine.

After thinking about this for a while I decided to try reinstalling the USB-to-Serial driver. It was installed when I was using the Arduino IDE and C++. That seems to have worked, but we’ll see.

The WS2812B is not lighting up. To help me debug the issue, rather than use the WS2812 LED strip I used the onboard LEDs.

#for Microcontroller NodeMCU 12E ESP8266 Board, the version I have that includes wifi capability

#The NodeMCU has two on-board LEDs
#The first LED comes with the ESP-12E Module and is connected to GPIO 2 of ESP8266
#The second LED is on the break-out board (near the CP2102 IC) and is connected to GPIO 16

#The ESP8266 uses ‘inverse logic’ meaning that they turn on when the pins are 0 and turn
#off when the pins are 1

import time
from machine import Pin
led1=Pin(2,Pin.OUT) #create the first LED object on pin 2 and set it to output
led2=Pin(16,Pin.OUT) #create the second LED object on pin 16 and set to output
i = 0

#Alternate the blinking of the LEDs every half second 40 times
while i < 40:
led1.value(1) #turn off
led2.value(0) #turn on
time.sleep(0.5)
led1.value(0) #turn on
led2.value(1) #turn off
time.sleep(0.5)
led1.value(1) #turn off
led2.value(0) #turn on

i = i + 1

Since I have over 40 LEDs in the strip I’m going to try using an external 5 volt power supply.

The Shell displays the error message:

Unable to connect to COM5: could not open port ‘COM5’: PermissionError(13, ‘Access is denied.’, None, 5)

If you have serial connection to the device from another program, then disconnect it there first.

Device Manager reports a COM5 at 11500 kbps, I lowered it to 9600 in Thonny

That’s great!

Hi Mike !

I’m glad it works now. Was it a software bug or something with the hardware?

This tutorial relies on the chance that the LEDs will work with 3.3V logic level (which is true for most of the time), but adding more and
more LEDs will make it more and more marginal. I would still recommend you to use a level shifter between the ESP and the LEDs.

Attila

Thanks Attila, really appreciate your reply, I have found my mistake. Right now, it’s working.

THANKS!
miKE

If it’s possible that I can send you my work through your email? Mine is 935431582@qq.com.

Regards,
Mike