diff --git a/examples/rpi_neopixel_simpletest.py b/examples/rpi_neopixel_simpletest.py new file mode 100644 index 0000000..11711ef --- /dev/null +++ b/examples/rpi_neopixel_simpletest.py @@ -0,0 +1,75 @@ +# Simple test for NeoPixels on Raspberry Pi +import time +import board +import neopixel + + +# Choose an open pin connected to the Data In of the NeoPixel strip, i.e. board.D18 +# NeoPixels must be connected to D10, D12, D18 or D21 to work. +pixel_pin = board.D18 + +# The number of NeoPixels +num_pixels = 30 + +# The order of the pixel colors - RGB or GRB. Some NeoPixels have red and green reversed! +# For RGBW NeoPixels, simply change the ORDER to RGBW or GRBW. +ORDER = neopixel.GRB + +pixels = neopixel.NeoPixel(pixel_pin, num_pixels, brightness=0.2, auto_write=False, + pixel_order=ORDER) + + +def wheel(pos): + # Input a value 0 to 255 to get a color value. + # The colours are a transition r - g - b - back to r. + if pos < 0 or pos > 255: + r = g = b = 0 + elif pos < 85: + r = int(pos * 3) + g = int(255 - pos*3) + b = 0 + elif pos < 170: + pos -= 85 + r = int(255 - pos*3) + g = 0 + b = int(pos*3) + else: + pos -= 170 + r = 0 + g = int(pos*3) + b = int(255 - pos*3) + return (r, g, b) if ORDER == neopixel.RGB or ORDER == neopixel.GRB else (r, g, b, 0) + + +def rainbow_cycle(wait): + for j in range(255): + for i in range(num_pixels): + pixel_index = (i * 256 // num_pixels) + j + pixels[i] = wheel(pixel_index & 255) + pixels.show() + time.sleep(wait) + + +while True: + # Comment this line out if you have RGBW/GRBW NeoPixels + pixels.fill((255, 0, 0)) + # Uncomment this line if you have RGBW/GRBW NeoPixels + # pixels.fill((255, 0, 0, 0)) + pixels.show() + time.sleep(1) + + # Comment this line out if you have RGBW/GRBW NeoPixels + pixels.fill((0, 255, 0)) + # Uncomment this line if you have RGBW/GRBW NeoPixels + # pixels.fill((0, 255, 0, 0)) + pixels.show() + time.sleep(1) + + # Comment this line out if you have RGBW/GRBW NeoPixels + pixels.fill((0, 0, 255)) + # Uncomment this line if you have RGBW/GRBW NeoPixels + # pixels.fill((0, 0, 255, 0)) + pixels.show() + time.sleep(1) + + rainbow_cycle(0.001) # rainbow cycle with 1ms delay per step