from machine import Pin
from urequests import get
from time import sleep_ms
from gc import collect

pin = Pin(2, Pin.IN)
pin_value = pin.value()
while True:
    current_value = pin.value()
    if pin_value != current_value:
        get('http://192.168.44.174:6543/value/%s' % current_value)
        pin_value = current_value
    collect()