from machine import Pin
from time import sleep

# Push Buttons
S1 = Pin(26, Pin.IN, Pin.PULL_UP)
S2 = Pin(27, Pin.IN, Pin.PULL_UP)
S3 = Pin(14, Pin.IN, Pin.PULL_UP)

# LEDs
greenLED = Pin(2, Pin.OUT)   # Unlock
redLED = Pin(4, Pin.OUT)     # Locked / Alarm

print("Escape Room System Started")

while True:

    # Read button states
    # Pressed = 1, Not Pressed = 0
    s1 = 1 if S1.value() == 0 else 0
    s2 = 1 if S2.value() == 0 else 0
    s3 = 1 if S3.value() == 0 else 0

    # Unlock Pattern = 001
    if s3 == 0 and s2 == 0 and s1 == 1:
        greenLED.on()
        redLED.off()
        print("UNLOCK")

    # Alarm Pattern = 110
    elif s3 == 1 and s2 == 1 and s1 == 0:
        greenLED.off()
        redLED.on()
        print("ALARM")

    # Locked (all other combinations)
    else:
        greenLED.off()
        redLED.on()
        print("LOCKED")

    sleep(0.2)