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# Author: peppe8o
# blog: https://peppe8o.com
# date: 22th May, 2022
#
# MQ-2 library to use gas sensor with Raspberry PI Pico (MicroPython)

from mq2 import MQ2
import utime

pin=26

sensor = MQ2(pinData = pin, baseVoltage = 3.3)

print("Calibrating")
sensor.calibrate()
print("Calibration completed")
print("Base resistance:{0}".format(sensor._ro))

while True:
	print("Smoke: {:.1f}".format(sensor.readSmoke())+" - ", end="")
	print("LPG: {:.1f}".format(sensor.readLPG())+" - ", end="")
	print("Methane: {:.1f}".format(sensor.readMethane())+" - ", end="")
	print("Hydrogen: {:.1f}".format(sensor.readHydrogen()))
	utime.sleep(0.5)