41 lines
834 B
Python
41 lines
834 B
Python
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from config import dht_gpio
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try:
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import Adafruit_DHT as dht
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except ImportError:
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dht = None
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try:
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import Adafruit_BMP.BMP085 as bmp
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except ImportError:
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bmp = None
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#TODO: background process for value sensing (every x seconds)
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KEY_TEMPERATURE = 't'
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KEY_HUMIDITY = 'h'
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KEY_PRESSURE = 'p'
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class EnvSens(object):
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def __init__(self):
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if bmp is not None:
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self.bmp = bmp.BMP085()
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def get_env_data(self):
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#
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# DHT22
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#
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if dht is None:
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h = -17.3
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t = -125.7
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else:
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h, t = dht.read_retry(dht.DHT22, dht_gpio)
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#
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# BMP180
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#
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if bmp is None:
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p = -1024.17
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else:
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p = self.bmp.read_pressure()/100.
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return {KEY_TEMPERATURE: t, KEY_HUMIDITY: h, KEY_PRESSURE: p}
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