__init__.py

import RPi.GPIO as GPIO
import adafruit_dht # Importing a library used for the DHT22 which is the same as our AM2302 
#import botbook_mcp3002 as mcp # For MQ-2 smoke sensor

LED_PIN = 21
AM2302_PIN = 2
PIR_MOTION_PIN = 8
DHT_SENSOR = adafruit_dht.DHT22(AM2302_PIN)

GPIO.setwarnings(False)

def connect():
    while True:
        try:
            GPIO.setmode(GPIO.BCM)
            GPIO.setwarnings(False)
            break

        except RuntimeError as error:
            print("Could not establish a connection to the Raspberry Pi")

_count = 0
def count():
    global _count
    _count += 1
    return _count

def read_sensor_temperature():
    """
    Returns the temperature as celsius
    """
    temperature = 0
    
    try:
        temperature = DHT_SENSOR.temperature
    except:
        temperature = -1
    if temperature == None:
        temperature = -1
    
    return temperature

def read_sensor_humidity():
    """
    Returns the humidity as relative humidity
    """
    humidity = 0

    try:
        humidity = DHT_SENSOR.humidity
    except:
        humidity = -1
    if humidity == None:
        humidity = -1
    
    return humidity

def read_sensor_motion():
    """
    Returns motion as True for ~1 second
    """
    GPIO.setup(PIR_MOTION_PIN, GPIO.IN)
    motion = GPIO.input(PIR_MOTION_PIN)
    return motion

def led_on():    
    GPIO.setup(LED_PIN, GPIO.OUT)
    GPIO.output(LED_PIN, GPIO.LOW) # Turn on LED


def led_off():
    GPIO.setup(LED_PIN, GPIO.OUT)
    GPIO.output(LED_PIN, GPIO.HIGH) # Turn off LED