AdafruitDHT.py

#!/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 time
import Adafruit_DHT

from socketIO_client import SocketIO, LoggingNamespace

def main():
	# 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:
		#send it to server
		with SocketIO('192.168.43.210', 5000, LoggingNamespace) as socketIO:
			socketIO.emit('HumReading', humidity)
			print 'HumReading : ', humidity
                #with SocketIO('192.168.43.76', 5000, LoggingNamespace) as socketIO:
                        #socketIO.emit('tempReading', temperature)
			#print 'tempReading sent'

	else:
		print 'Failed to get reading. Try again!'
		sys.exit(1)

if __name__ == '__main__':
        while True:
                main()
                time.sleep(2)