from machine import Pin
import time

# GP's to be used as inputs for switches
switch_pins = [Pin(i, Pin.IN, Pin.PULL_DOWN) for i in (0, 1, 2, 3)] 

def read_switches():
    '''Reads the state of the four switches and returns a binary value'''
    binary_value = 0
    for i, pin in enumerate(switch_pins):
        if pin.value() == 1:
            binary_value |= (1 << i)  # Set the corresponding bit in binary_value
    return binary_value

while True:
    binary_value = read_switches()
    print("Binary value from switches:", binary_value)
    time.sleep_ms(1000)  # Update every 1 second