("Project: MQ2 Gas Leak Alarm System")
print("Developed by: Fatihah Zulkefli")
print("Date: 14/4/2025")

#Import library/module
from machine import ADC, Pin, PWM
from time import sleep

#Pin Declaration
gas_sensor = ADC(Pin(36, Pin.IN))
buzzer = PWM(Pin(4, Pin.OUT))

#Parameter Declaration (Optional)
THRESHOLD = 2000


#Main Program
while True:
    gas_level = gas_sensor.read()
    print("Gas Level: ", gas_level)

    if gas_level > THRESHOLD:
        print("Gas Detected!")
        buzzer.init(freq = 5000, duty = 512)
    else:
        buzzer.init(freq = 5000, duty = 0)

    sleep(1)