1. def measure_distance(trig_pin, echo_pin, num_readings=5):
2.     distances = []
3.  
4.     for _ in range(num_readings):
5.         GPIO.output(trig_pin, True)
6.         time.sleep(0.00001)
7.         GPIO.output(trig_pin, False)
8.  
9.         pulse_start = time.time()
10.         pulse_end = time.time()
11.  
12.         while GPIO.input(echo_pin) == 0:
13.             pulse_start = time.time()
14.  
15.         while GPIO.input(echo_pin) == 1:
16.             pulse_end = time.time()
17.  
18.         pulse_duration = pulse_end - pulse_start
19.         distance = pulse_duration * 17150  # Speed of sound = 34300 cm/s
20.         distances.append(distance)
21.  
22.     avg_distance = sum(distances) / num_readings
23.     return avg_distance
24.  
25.  
26. import RPi.GPIO as GPIO
27. import time
28. import pygame
29.  
30. # ... (rest of the code remains the same)
31.  
32. try:
33.     people_inside = 0  # Counter for people inside the room
34.     entry_cooldown = False  # Flag to prevent rapid multiple entries
35.  
36.     while True:
37.         enter_distance = measure_distance(ENTER_TRIG_PIN, ENTER_ECHO_PIN, num_readings=5)
38.         exit_distance = measure_distance(EXIT_TRIG_PIN, EXIT_ECHO_PIN, num_readings=5)
39.  
40.         # Detecting if someone is within 30 cm range
41.         if enter_distance < 30 and not entry_cooldown:
42.             people_inside += 1
43.             entry_cooldown = True
44.             time.sleep(2)  # Cooldown period, adjust as needed
45.  
46.         if exit_distance < 30 and people_inside > 0:
47.             people_inside -= 1
48.  
49.         if people_inside > 0:
50.             play_audio()
51.             control_led_strip(GPIO.HIGH)
52.         else:
53.             stop_audio()
54.             control_led_strip(GPIO.LOW)
55.  
56.         if not (enter_distance < 30):
57.             entry_cooldown = False
58.  
59. except KeyboardInterrupt:
60.     GPIO.cleanup()
61.     pygame.mixer.quit()
62.