first time posting here so i will try to explain my best . I have 1 infra red transmitter on one side and second on other side , and when someone passes through i want to detect and call some function. Everything is working fine , but sometimes it detects passing through when nobody is passed , something like false edge detection, plus when i cross and stand in between the calling function is called 3 times or 2 times , depends. I dont know what the problem may be , i tried connecting it like this LINK

without the capacitor but its still the same , My code is :

import RPi.GPIO as gpio
import time

pin = 11

def on_pushdown(channel):

    latest_state = None
    inputValue = gpio.input(pin)
    if inputValue != latest_state:
        latest_state = inputValue
        if latest_state:
            print("Button2 pressed")



try:
    # Setting GPIO layout
    gpio.setmode(gpio.BOARD)
    # Set pin as input pin pulled down to GND
    gpio.setup(pin, gpio.IN, pull_up_down=gpio.PUD_DOWN)
    gpio.setup(pin1, gpio.IN, pull_up_down=gpio.PUD_UP)




    while True:
        #print(gpio.input(11))
        if not 'event' in locals():
            event = gpio.add_event_detect(pin, gpio.FALLING, callback=on_pushdown, bouncetime=1)
        else:
            time.sleep(1)

finally:
    gpio.cleanup()