def do_work():
D = []
# 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).
H0, T0 = bonediagd_DHT.read_retry(sensor_type, sensor_pin)
# 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 H0 is not None and T0 is not None:
H = H0 * DHT22H_gain + DHT22H_offset
T = T0 * DHT22T_gain + DHT22T_offset
D.append(T)
D.append(H)
if DEBUG:print ' T0 = {0:0.1f}*C H0 = {1:0.1f}%'.format(T0, H0)
if DEBUG:print 'Temp = {0:0.1f}*C Humidity = {1:0.1f}%'.format(T, H)
return D
# 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 bonediagd_DHT
# Sensor should be set to bonediagd_DHT.DHT11,
# bonediagd_DHT.DHT22, or bonediagd_DHT.AM2302.
sensor = bonediagd_DHT.DHT22
# Example using a Beaglebone Black with DHT sensor
# connected to pin P8_11.
pin = 'P8_15'
# 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 = bonediagd_DHT.read_retry(sensor, pin)
# 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}*C Humidity={1:0.1f}%'.format(temperature, humidity)
else:
print 'Failed to get reading. Try again!'
import bonediagd_DHT
# Parse command line parameters.
sensor_args = {"11": bonediagd_DHT.DHT11, "22": bonediagd_DHT.DHT22, "2302": bonediagd_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 ./readDHT.py [11|22|2302] GPIOpin#"
print "example: sudo ./readDHT.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 = bonediagd_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)
