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- #!/usr/bin/python
- # Copyright (c) 2014 Adafruit Industries
- # Author: Tony DiCola
- # Permission is hereby granted, free of charge, to any person obtaining a copy
- # of this software and associated documentation files (the "Software"), to deal
- # in the Software without restriction, including without limitation the rights
- # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- # copies of the Software, and to permit persons to whom the Software is
- # furnished to do so, subject to the following conditions:
- # The above copyright notice and this permission notice shall be included in all
- # copies or substantial portions of the Software.
- # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- # SOFTWARE.
- import sys
- import Adafruit_DHT
- # Parse command line parameters.
- sensor_args = { '11': Adafruit_DHT.DHT11,
- '22': Adafruit_DHT.DHT22,
- '2302': Adafruit_DHT.AM2302 }
- if len(sys.argv) == 3 and sys.argv[1] in sensor_args:
- sensor = sensor_args[sys.argv[1]]
- pin = sys.argv[2]
- else:
- print('usage: sudo ./Adafruit_DHT.py [11|22|2302] GPIOpin#')
- print('example: sudo ./Adafruit_DHT.py 2302 4 - Read from an AM2302 connected to GPIO #4')
- sys.exit(1)
- # Try to grab a sensor reading. Use the read_retry method which will retry up
- # to 15 times to get a sensor reading (waiting 2 seconds between each retry).
- humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
- # Un-comment the line below to convert the temperature to Fahrenheit.
- # temperature = temperature * 9/5.0 + 32
- # Note that sometimes you won't get a reading and
- # the results will be null (because Linux can't
- # guarantee the timing of calls to read the sensor).
- # If this happens try again!
- if humidity is not None and temperature is not None:
- print('Temp={0:0.1f}* Humidity={1:0.1f}%'.format(temperature, humidity))
- else:
- print('Failed to get reading. Try again!')
- sys.exit
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