HUE_END = 260
# Set up brightness minimum and maximum (between 0.0 and 1.0)
BRIGHTNESS_MIN = 0.2
BRIGHTNESS_MAX = 0.7
# Set up speed (wait time between updates, in seconds.)
SPEED = 0.3
# Pick *one* LED type by uncommenting the relevant line below:
# APA102 / DotStar™ LEDs
# led_strip = plasma.APA102(NUM_LEDS, 0, 0, plasma2040.DAT, plasma2040.CLK)
# WS2812 / NeoPixel™ LEDs
led_strip = plasma.WS2812(NUM_LEDS, 0, 0, plasma2040.DAT)
# Start updating the LED strip
led_strip.start()
# Light up all the leds random colours and brightnesses from the specified ranges...
for i in range(NUM_LEDS):
led_strip.set_hsv(i,
randrange(HUE_START, HUE_END) / 360, 1.0,
uniform(BRIGHTNESS_MIN, BRIGHTNESS_MAX))
while True:
# ...and then update one random pixel at a time to keep things fresh and sparkly.
# Comment out the lines below if you want static lights.
led_strip.set_hsv(randrange(0, NUM_LEDS),
randrange(HUE_START, HUE_END) / 360, 1.0,
This example uses the Plasma WS2812 LED library to drive a string of LEDs alongside the built-in RGB LED.
You should wire your LEDs to VBUS/GND and connect the data pin to pin 27 (unused by Pico Wireless).
Go to: https://<address>:<port>/set_led/<index> to set a single LED
"""
NUM_LEDS = 30 # Number of connected LEDs
LED_PIN = 27 # LED data pin (27 is unused by Pico Wireless)
LED_PIO = 0 # Hardware PIO (0 or 1)
LED_SM = 0 # PIO State-Machine (0 to 3)
r = 0
g = 0
b = 0
led_strip = plasma.WS2812(NUM_LEDS, LED_PIO, LED_SM, LED_PIN)
# Edit your routes here
# Nothing fancy is supported, just plain ol' URLs and GET/POST methods
@ppwhttp.route("/", methods=["GET", "POST"])
def get_home(method, url, data):
if method == "POST":
global r, g, b
r = int(data.get("r", 0))
g = int(data.get("g", 0))
b = int(data.get("b", 0))
ppwhttp.set_led(r, g, b)
for i in range(NUM_LEDS):
led_strip.set_rgb(i, r, g, b)
print("Set LED to {} {} {}".format(r, g, b))