RGB diskovalo GPIO liitäntään.

rgb_powerled.py

import RPi.GPIO as GPIO
import time
from math import (sin, pi)
from psutil import cpu_percent
import logging
logger = logging.getLogger(__name__)

GPIO.setwarnings(False)

red_gpio = 26
green_gpio = 19
blue_gpio = 13

# Kirkkaus 0-1.
#brightness = lambda: cpu_percent() / 100
brightness = 0.1
fps = 1/30

def main(red_gpio, green_gpio, blue_gpio, freq=100):
    GPIO.setmode(GPIO.BCM)

    GPIO.setup(red_gpio, GPIO.OUT) 
    GPIO.setup(green_gpio, GPIO.OUT) 
    GPIO.setup(blue_gpio, GPIO.OUT) 

    logger.debug("PINS (RGB):", red_gpio, green_gpio, blue_gpio)

    RED = GPIO.PWM(red_gpio, freq)
    GREEN = GPIO.PWM(green_gpio, freq)
    BLUE = GPIO.PWM(blue_gpio, freq)

    offset_step = pi*2/3
    def get_intensity(offset):
        _brightness = brightness() if callable(brightness) else brightness
        intensity = sin(seed+(offset_step*offset))
        if 0 < intensity < 1:
            return min (100, max(0, (100 * intensity) * _brightness))
        else:
            return 0

    try:
        RED.start(0)
        GREEN.start(0)
        BLUE.start(0)
        while True:
            seed = time.time()
            RED.ChangeDutyCycle(get_intensity(1))
            GREEN.ChangeDutyCycle(get_intensity(2))
            BLUE.ChangeDutyCycle(get_intensity(3))
            time.sleep(fps)

    except Exception as e:
        RED.stop()
        GREEN.stop()
        BLUE.stop()
        GPIO.cleanup()
        raise e


if __name__ == "__main__":
    main(red_gpio=red_gpio, green_gpio=green_gpio, blue_gpio=blue_gpio)