from machine import Pin, ADC, PWM

import time



gas_sensor = ADC(28)

buzzer = PWM(Pin(15))  

buzzer.freq(1000)  



GAS_THRESHOLD = 61500  

while True:

    gas_value = gas_sensor.read_u16() 

    print("Gas Sensor Value:", gas_value) 

    if gas_value > GAS_THRESHOLD:

        print("LPG Gas Detected! Activating buzzer...")

        buzzer.duty_u16(61500)  

    else:

        print("No Gas Detected. Buzzer OFF.")

        buzzer.duty_u16(0)  

    time.sleep(1)