MacroPad RP2040 NeoPixel LEDs

Introduction

You can buy MacroPad on the official Adafruit store.

Disclaimer

I do not earn anything from this post or from whether or not you buy anything from the Adafruit website. All the articles on my blog are written for the love of open source.

This blog post will allow you to control MacroPad switches LEDs.

Code

Embedded📂 adafruit/macropad-rp2040/neopixel

color-wipe/code.py

code.py

from adafruit_macropad import MacroPad
import time

macropad = MacroPad()

NUM_LEDS = 12

# Initialize NeoPixel strip
# strip = neopixel.NeoPixel(PIN, NUM_LEDS, brightness=BRIGHTNESS, auto_write=False)

def set_pixel(pixel_number, red, green, blue):
    if 0 <= pixel_number < NUM_LEDS:
        macropad.pixels[pixel_number] = (red, green, blue)

def color_wipe(red, green, blue, delay_time):
    for i in range(NUM_LEDS):
        set_pixel(i, red, green, blue)
        time.sleep(delay_time)

def reverse_color_wipe(red, green, blue, delay_time):
    for i in range(NUM_LEDS-1, -1, -1):
        set_pixel(i, red, green, blue)
        time.sleep(delay_time)


# Main loop
while True:
    color_wipe(220, 44, 0, 0.1)
    color_wipe(48, 79, 255, 0.1)
    color_wipe(0, 191, 165, 0.1)
    reverse_color_wipe(220, 44, 0, 0.1)
    reverse_color_wipe(48, 79, 255, 0.1)
    reverse_color_wipe(0, 191, 165, 0.1)

📂 adafruit/macropad-rp2040/neopixel/color-wipe/code.pyView on GitLab ↗

meteor-rain/code.py

code.py

from adafruit_macropad import MacroPad
import time

macropad = MacroPad()
import time
import board
import neopixel
import random

# Configuration
NUM_LEDS = 12       # Number of LEDs
BRIGHTNESS = 0.67    # Range: 0.0 - 1.0 (170/255 ≈ 0.67)

# Initialize NeoPixel strip
# strip = neopixel.NeoPixel(PIN, NUM_LEDS, brightness=BRIGHTNESS, auto_write=False)

def set_pixel(pixel_number, red, green, blue):
    if 0 <= pixel_number < NUM_LEDS:
        macropad.pixels[pixel_number] = (red, green, blue)

def set_all(red, green, blue):
    for i in range(NUM_LEDS):
        macropad.pixels[i] = (red, green, blue)
    # strip.show()

def fade_to_black(led_no, fade_value):
    r, g, b = macropad.pixels[led_no]
    r = 0 if r <= 10 else r - (r * fade_value // 256)
    g = 0 if g <= 10 else g - (g * fade_value // 256)
    b = 0 if b <= 10 else b - (b * fade_value // 256)
    macropad.pixels[led_no] = (int(r), int(g), int(b))

def meteor_rain(red, green, blue, meteor_size, meteor_trail_decay, meteor_random_decay, speed_delay):
    set_all(0, 0, 0)

    for i in range(NUM_LEDS * 2):
        # Fade brightness of all LEDs one step
        for j in range(NUM_LEDS):
            if (not meteor_random_decay) or (random.randint(0, 9) > 5):
                fade_to_black(j, meteor_trail_decay)

        # Draw meteor
        for j in range(meteor_size):
            if 0 <= i - j < NUM_LEDS:
                set_pixel(i - j, red, green, blue)

        # strip.show()
        time.sleep(speed_delay / 1000.0)

# Main loop
while True:
    # Example meteor effect
    # meteor_rain(255, 255, 255, 10, 64, True, 30)
    meteor_rain(255, 187, 187, 10, 80, True, 50)

📂 adafruit/macropad-rp2040/neopixel/meteor-rain/code.pyView on GitLab ↗

rainbow-cycle/code.py

code.py

from adafruit_macropad import MacroPad # https://docs.circuitpython.org/projects/macropad/en/latest/
from rainbowio import colorwheel # https://docs.circuitpython.org/en/latest/shared-bindings/rainbowio/index.html
import time
import random

macropad = MacroPad()
NUM_LEDS = 12 # number of LEDs

def rainbow_cycle(wait):
    for color in range(255):
        for pixel in range(NUM_LEDS):
            pixel_index = (pixel * 256 // NUM_LEDS) + color * 5
            macropad.pixels[pixel] = colorwheel(pixel_index & 255)
        macropad.pixels.show()
        time.sleep(wait)


while True:
    # increase the parameter to slow down the rainbow, decrease to speed it up.
    rainbow_cycle(0.01)

📂 adafruit/macropad-rp2040/neopixel/rainbow-cycle/code.pyView on GitLab ↗

The effects I wrote for the MacroPad are:

• Color Wipe
• Meteor Rain
• Rainbow Cycle