29 lines
884 B
Python
29 lines
884 B
Python
'''Module for sensor implementations'''
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try:
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import Adafruit_DHT
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except ImportError:
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raise ImportError('Adafruit_DHT library not found.')
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def is_valid(temperature, humidity):
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'''Check if temperature and humidity are valid.'''
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return True if humidity <= 100.0 and humidity >= 0.0 and \
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temperature <= 100.0 and temperature >= -50.0 else False
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class Dht22(object):
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'''DHT 22 temperature and Humidity sensor class.'''
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sensor = 22
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pin = int()
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def __init__(self, pin):
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self.pin = pin
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def read(self):
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'''Read temperature and humidity.'''
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temperature = -200.0
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humidity = -1.0
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valid = False
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while valid is False:
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temperature, humidity = Adafruit_DHT.read_retry(self.sensor, self.pin)
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valid = is_valid(temperature, humidity)
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return temperature, humidity
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