DHT22 sensors readings using Adafruit Python DHT Sensor Library

temperature.py

#!/usr/bin/python

# Requires Adafruit Python DHT Sensor Library
# https://github.com/adafruit/Adafruit_Python_DHT
# [email protected]:adafruit/Adafruit_Python_DHT.git

# Measures temperature 5 times, and sends average to thingspeak.
# First measurement is discarded.
# It is intended to be executed by cron in background

import Adafruit_DHT
import httplib, urllib

# Configuration
sensor = Adafruit_DHT.DHT22
pin = 22

# Measurement
humidity = 0.0
temperature = 0.0

for i in range(0,6):
    h, t = Adafruit_DHT.read_retry(sensor, pin)
    if i == 0:
        continue
    humidity = humidity + h
    temperature = temperature + t

humidity = humidity/5
temperature = temperature/5

# Submit through API
params = urllib.urlencode({'field1': temperature, 'field2': humidity, 'key':'xxx'})
headers = {"Content-type": "application/x-www-form-urlencoded","Accept": "text/plain"}
conn = httplib.HTTPConnection("api.thingspeak.com:80")
try:
    conn.request("POST", "/update", params, headers)
    response = conn.getresponse()
    data = response.read()
    conn.close()
except:
    print "connection failed"