ich bin Neuling was die Python-Programierung angeht. Mein erstes Projekt sollte ein am Raspberrry angeschlossener LED-Stripe WS2812B mit 60 LEDs (ohne extra Stromzufuhr (da nur bei 10-20% Brightness) sein.
Das Script läuft auch schon, auch in der vrtuellen Umgebung und in CRON eingebunden.
Leider gibt es zwischenzeitlich allerdings im Betrieb das merkwürdige verhalten, dass die aktuelle Uhrzeit nicht richtig angezeigt wird.
Gedane war:
1. beim starten des Scipts blinkt die (0) Led dreimal blau --> funktionier
2. Beim Scriptstart holt er sich die aktuelle Zeit und schaltet die grünen LEDs ein, die bereits leuchten sollen
3. Alle 7 Minuten erleuchtet eine LED in grün hinzu -> es funktioniert, das alle 7 Minuten eine hinzuwächst
4. Die LEDS, welche die vollen Stunden deutlich machen, leuchten dauerhaft in weiß --> funktioniert super
Außerdem habe ich die Funktion eingefügt, dass ich die Zeitdauer, in die Uhr laufen soll z.B. 8 bis 16 Uhr, definieren kann --> hier scheint es noch nicht richtig programiert zu sein.
Kann mir da eventuell jemand einen Tipp geben, was ich falsch habe:
Würde mir sehr helfen.
Code: Alles auswählen
#!/usr/bin/env python3
import time
from rpi_ws281x import Adafruit_NeoPixel, Color # Corrected import
from datetime import datetime, timedelta
# LED strip configuration:
LED_COUNT = 60 # Number of LED pixels.
LED_PIN = 18 # GPIO pin connected to the pixels (18 uses PWM!).
LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
LED_DMA = 10 # DMA channel to use for generating a signal (try 10)
LED_BRIGHTNESS = 10 # Set to 0 for darkest and 255 for brightest
LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
LED_CHANNEL = 0 # Set to '1' for GPIOs 13, 19, 41, 45 or 53
COLOR_GREEN = Color(0, 255, 0) # Green color
COLOR_BLUE = Color(0, 0, 255) # Blue color
COLOR_WHITE = Color(255, 255, 255) # White color
# Constants for the time-based LED clock
START_HOUR = 9 # Start of the LED clock (9 AM)
END_HOUR = 16 # End of the LED clock (4 PM)
MINUTES_PER_LED = 7 # 7 minutes per LED
SECONDS_PER_LED = MINUTES_PER_LED * 60 # 7 minutes in seconds
TOTAL_HOURS = END_HOUR - START_HOUR # Total duration in hours (7 hours)
# Initialize LED strip
def init_strip():
strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
strip.begin()
return strip
# Function to calculate the number of LEDs that should be on based on the current time
def calculate_active_leds():
now = datetime.now()
current_hour = now.hour
current_minute = now.minute
# Check if the current time is within the range of 9 AM to 4 PM
if current_hour < START_HOUR or current_hour >= END_HOUR:
return 0 # No LEDs should be lit outside this time range
# Calculate the total minutes since 9 AM
total_minutes_passed = (current_hour - START_HOUR) * 60 + current_minute
total_leds_passed = total_minutes_passed // MINUTES_PER_LED
# Ensure we don't go beyond the total number of LEDs
return min(total_leds_passed, LED_COUNT)
# Function to set the full-hour LEDs to white from the start
def set_full_hour_leds_to_white(strip):
# Full hours are at the given indices for full-hour marks
full_hour_leds = [0, 9, 18, 24, 32, 40, 49, 57, ] # Full-hour LED indices
for led in full_hour_leds:
strip.setPixelColor(led, COLOR_WHITE) # Set each full-hour LED to white
strip.show()
# Function to blink the first LED three times in blue
def blink_blue_led(strip, blink_count=3):
for _ in range(blink_count):
strip.setPixelColor(0, COLOR_BLUE) # Set first LED to blue
strip.show() # Update the LED
time.sleep(0.5) # Wait for 0.5 seconds
strip.setPixelColor(0, Color(0, 0, 0)) # Turn off the LED
strip.show() # Update the LED
time.sleep(0.5) # Wait for 0.5 seconds
# Function to turn on LEDs progressively like a clock without full-hour white LEDs
def clock_progress(strip):
interval_duration = SECONDS_PER_LED
# Turn on already elapsed LEDs
active_leds = calculate_active_leds()
for i in range(active_leds):
strip.setPixelColor(i, COLOR_GREEN) # Turn on the LED in green
strip.show() # Update the LEDs to reflect the already active ones
# Continue lighting the next LEDs at the appropriate interval
for i in range(active_leds, LED_COUNT - 1): # Leave the last LED for the blue color
# Ensure we are within the time range
now = datetime.now()
if now.hour >= END_HOUR:
break # Stop once we hit 4 PM
time.sleep(interval_duration) # Wait for 7 minutes before lighting the next LED
strip.setPixelColor(i, COLOR_GREEN) # Turn on the next LED in green
strip.show() # Update the LEDs
# Main program logic follows:
if __name__ == '__main__':
# Create NeoPixel object with appropriate configuration.
strip = init_strip()
print('Press Ctrl-C to quit.')
try:
# Blink the first LED in blue three times at startup
blink_blue_led(strip)
# Set full-hour LEDs to white initially
set_full_hour_leds_to_white(strip)
# Run the clock progress function
clock_progress(strip) # Light up LEDs progressively from 9 AM to 4 PM
except KeyboardInterrupt:
# Clear the strip if interrupted
for i in range(LED_COUNT):
strip.setPixelColor(i, Color(0, 0, 0)) # Turn off all LEDs
strip.show()
