import time
from machine import Pin


time.sleep(0.1) # Wait for USB to become ready

print("Hello, Pi Pico!")

# Define the GPIO pins
pin1 = Pin(14, Pin.IN, Pin.PULL_DOWN)
pin2 = Pin(15, Pin.IN, Pin.PULL_DOWN)
pin3 = Pin(16, Pin.IN, Pin.PULL_DOWN)
pin4 = Pin(17, Pin.IN, Pin.PULL_DOWN)

# Define the state combinations and corresponding letters
states = {
    (0, 0, 0, 0): 1,
    (0, 0, 0, 1): 2,
    (0, 0, 1, 0): 3,
    (0, 0, 1, 1): 4,
    (0, 1, 0, 0): 5,
    (0, 1, 0, 1): 6,
    (0, 1, 1, 0): 7,
    (0, 1, 1, 1): 8,
    (1, 0, 0, 0): 9,
    (1, 0, 0, 1): 10,
    (1, 0, 1, 0): 11,
    (1, 0, 1, 1): 12,
    (1, 1, 0, 0): 13,
    (1, 1, 0, 1): 14,
    (1, 1, 1, 0): 15,
    (1, 1, 1, 1): 0
}

while True:
    # Read the pin values
    pin1_state = pin1.value()
    pin2_state = pin2.value()
    pin3_state = pin3.value()
    pin4_state = pin4.value()

    # Create a tuple of the pin states
    current_state = (pin1_state, pin2_state, pin3_state, pin4_state)

    # Get the corresponding letter
    value = states.get(current_state, 'Combination not defined')

    print(f"Current State: {current_state}, Number: {value}")
    time.sleep(2)