10.04.2016 Pythin: DHT22 on Raspberry Pi (Vcc Pin 12)

#!/usr/bin/python

import sys
import time
import Adafruit_DHT
import RPi.GPIO as GPIO

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(12, GPIO.OUT)
GPIO.output(12, GPIO.HIGH)

time.sleep(2)
humidity, temperature = Adafruit_DHT.read_retry(Adafruit_DHT.DHT22, 17)

i = 0

while humidity is None and temperature is None and i<10:
        i += 1
        GPIO.output(12, GPIO.LOW)
        time.sleep(3)
        GPIO.output(12, GPIO.HIGH)
        time.sleep(3)
        humidity, temperature = Adafruit_DHT.read(Adafruit_DHT.DHT22, 17)

if humidity is not None and temperature is not None:
	print ('{0:.{1}f}'.format((temperature*10),0))
	print ('{0:.{1}f}'.format((humidity*10),0))
        print '0'
        print 'Bathroom Temp+Hum'
else:
	print '0'
	print '0'
        print '0'
        print 'Bath