init

app/utils/countdown.py

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+import time
+import threading
+import pygame
+
+def play_sound(path):
+    pygame.mixer.init()
+    sound = pygame.mixer.Sound(path)
+    sound.play()
+    time.sleep(sound.get_length())
+
+def start():
+    def countdown_thread():
+        for i in range(3):
+            play_sound("app/static/sounds/beep.wav")
+            time.sleep(1)
+        play_sound("app/static/sounds/go.wav")
+    threading.Thread(target=countdown_thread).start()

app/utils/gpio_handler.py

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+from gpiozero import Button
+from signal import pause
+import time
+
+class Lichtschranke:
+    def __init__(self, gpio_pin, callback, schutzzeit=3):
+        self.pin = gpio_pin
+        self.callback = callback
+        self.last_trigger = 0
+        self.button = Button(gpio_pin, pull_up=False, bounce_time=0.05)
+        self.button.when_pressed = self._ausgeloest
+        self.schutzzeit = schutzzeit
+
+    def _ausgeloest(self):
+        jetzt = time.time()
+        if jetzt - self.last_trigger > self.schutzzeit:
+            self.last_trigger = jetzt
+            self.callback()
+
+    def stop(self):
+        self.button.close()

app/utils/init.py

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+# leer

app/utils/system_tools.py

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+import subprocess
+
+def reboot():
+    subprocess.run(["sudo", "reboot"])
+
+def shutdown():
+    subprocess.run(["sudo", "shutdown", "now"])
+
+def restart_service():
+    subprocess.run(["sudo", "systemctl", "restart", "rennstopuhr.service"])
+
+def get_logs():
+    result = subprocess.run(["journalctl", "-u", "rennstopuhr.service", "--no-pager"], capture_output=True, text=True)
+    return result.stdout

app/utils/zeitmessung.py

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+import time
+
+class Zeitmesser:
+    def __init__(self):
+        self.startzeit = None
+        self.runden = []
+    
+    def start(self):
+        self.startzeit = time.perf_counter()
+    
+    def runde(self):
+        if self.startzeit is None:
+            return None
+        jetzt = time.perf_counter()
+        rundenzeit = jetzt - self.startzeit
+        self.runden.append(rundenzeit)
+        self.startzeit = jetzt
+        return rundenzeit
+    
+    def reset(self):
+        self.startzeit = None
+        self.runden = []