from machine import Pin
from time import sleep_ms

# pin1 = Pin(16, Pin.IN)
pin2 = Pin(17, Pin.IN)

class Beam:
    def __init__(self, id: int, pin: Pin):
        self.id = id
        self.pin = pin
        self.prev_val = pin.value()

    def check(self):
        val = self.pin.value()
        if val != self.prev_val:
            self.prev_val = val
            print(f"EVENT IK_MODULE {self.id} {val}")

beam = Beam(1, pin2)
while True:
    beam.check()
    sleep_ms(50)