from machine import Pin, ADC
import time

# Define the analog pin connected to the gas sensor
gas_sensor = ADC(Pin(2))  # Use appropriate pin (e.g., 26 for Pico)

# Define the pin connected to the LED
led = Pin(0, Pin.OUT)  # Use the correct GPIO number

# Set threshold for gas detection
GAS_THRESHOLD = 30000  # Adjust this value based on calibration

while True:
    gas_value = gas_sensor.read_u16()  # For 16-bit ADC resolution
    print("Gas Sensor Reading:", gas_value)

    if gas_value > GAS_THRESHOLD:
        print("Gas detected!")
        led.on()
    else:
        led.off()

    time.sleep(0.5)