TempHumidDisplay.sh

#!/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.

# This script is a slight modification of Adafruit_Python_DHT/examples/simpletest.py 
# from: https://github.com/adafruit/Adafruit_Python_DHT
# 
# The script gets the temperature and humidity readings from a DHT11/22 on a RaspberryPi 2
# and passes the readings to the DisplayLCDMessage.py script.

import Adafruit_DHT

# Sensor should be set to Adafruit_DHT.DHT11,
# Adafruit_DHT.DHT22, or Adafruit_DHT.AM2302.
sensor = Adafruit_DHT.DHT22

# Example using a Raspberry Pi with DHT sensor
# connected to GPIO23.
pin = 25

# 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)

# 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:
    array = []

    # Add the script name to the array (to maintain compatibility with running from the command line (i.e. Bash's $0)
    array.append("TempHumidDisplay.sh");
    # Convert to Fahrenheit
    array.append("Temp: {0:.1f}\x01F".format(((temperature * 9/5) + 32)))
    array.append('Humidity: {0:0.1f}%'.format(humidity))
    
    from DisplayLCDMessage import *
    
    main(array)
else:
    print('Failed to get reading. Try again!')