temperature.py

import Adafruit_DHT


class temperature:
    def __init__(self, temperature_humidity_sensor_pin=None, W1_sensor_address=None):
        self.temperature_humidity_sensor_pin = temperature_humidity_sensor_pin
        self.W1_sensor_address = W1_sensor_address

    def read_one_wire_temperature(self):
        try:
            if (self.W1_sensor_address):
                W1_path = '/sys/bus/w1/devices/{0}/w1_slave'.format(
                    self.W1_sensor_address)
                with open(W1_path, 'r') as file:
                    for line in file:
                        position = line.find("t=")
                        if position > -1:
                            subtract = line[position:]
                            temperature_string = subtract[2:-1]
                            temperature = int(temperature_string)/1000

                            return temperature
            else:
                raise ValueError('No sensor address')
        except ValueError as ve:
            return ve

    def read_temperature_humidity_sensor(self):
        sensor = Adafruit_DHT.DHT11
        try:
            humidity, temperature = Adafruit_DHT.read_retry(
                sensor, self.temperature_humidity_sensor_pin)
            if (humidity and temperature):
                return {'temperature': temperature, 'humidity': humidity}
            else:
                raise ValueError('Failed to get reading')
        except ValueError as ve:
            return ve