import time
import board
import busio
import adafruit_ads1x15.ads1115 as ADS
from adafruit_ads1x15.analog_in import AnalogIn
import RPi.GPIO as gpio

gpio.setmode(gpio.BCM)
gpio.setup(pin, gpio.OUT)
gpio.output(pin, gpio.LOW)

i2c = busio.I2C(board.SCL, board.SDA)

# Create the ADS object and specify the gain
ads = ADS.ADS1115(i2c)
ads.gain = 1 
chan = AnalogIn(ads, ADS.P0)

# Continuously print the values
while True:
    print(f"MQ-135 Voltage: {chan.voltage}V")
    time.sleep(1)