# Parse command line parameters.
sensor_args = {
'11': Hema_DHT.DHT11,
'22': Hema_DHT.DHT22,
'2302': Hema_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 ./Hema_DHT.py [11|22|2302] GPIOpin#'
print 'example: sudo ./Hema_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 = Hema_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(1)
# Parse command line parameters.
sensor_args = { '11': Hema_DHT.DHT11,
'22': Hema_DHT.DHT22,
'2302': Hema_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 ./Hema_DHT.py [11|22|2302] GPIOpin#'
print 'example: sudo ./Hema_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 = Hema_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(1)
