by chatGPT -- code not tested

	
								
import RPi.GPIO as GPIO
import time

PIN_TX = 17  # Assuming GPIO pin 17 for TX on Raspberry Pi
PIN_RX = 18  # Assuming GPIO pin 18 for RX on Raspberry Pi

count = 0

def falling_callback(channel):
    global count
    count += 1

def on(length):
    for _ in range(length):
        GPIO.output(PIN_TX, GPIO.HIGH)
        time.sleep(0.0006)
        GPIO.output(PIN_TX, GPIO.LOW)
        time.sleep(0.0009)

def setup():
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(PIN_TX, GPIO.OUT)
    GPIO.setup(PIN_RX, GPIO.IN)
    GPIO.add_event_detect(PIN_RX, GPIO.FALLING, callback=falling_callback)
    count = 0

def loop():
    on(10)
    print(count)
    time.sleep(1)

if __name__ == "__main__":
    setup()
    try:
        while True:
            loop()
    except KeyboardInterrupt:
        GPIO.cleanup()