树莓派连接dht11温度传感器获取温度(python)

# -*- coding: utf-8 -*-

import RPi.GPIO as gpio
import time

PORT=13 #使用的树莓派的PIN13也就是GPIO27，根据自己连接位置更改此参数

gpio.setwarnings(False)
gpio.setmode(gpio.BOARD)
time.sleep(1)
data=[]
def delay(i): #20*i usdelay
a=0
for j in range(i):
a+1
j=0

#start work
gpio.setup(PORT,gpio.OUT)
gpio.output(PORT,gpio.LOW)
time.sleep(0.02)
gpio.output(PORT,gpio.HIGH)
i=1

#wait to response
gpio.setup(PORT,gpio.IN)

while gpio.input(PORT)==1:
continue

while gpio.input(PORT)==0:
continue

while gpio.input(PORT)==1:
continue

#get data
while j<40:
k=0
while gpio.input(PORT)==0:
continue

while gpio.input(PORT)==1:
k+=1
if k>100:break
if k<3:
data.append(0)
else:
data.append(1)
j+=1

#get temperature
humidity_bit=data[0:8]
humidity_point_bit=data[8:16]
temperature_bit=data[16:24]
temperature_point_bit=data[24:32]
check_bit=data[32:40]

humidity=0
humidity_point=0
temperature=0
temperature_point=0
check=0

for i in range(8):
humidity+=humidity_bit[i]*2**(7-i)
humidity_point+=humidity_point_bit[i]*2**(7-i)
temperature+=temperature_bit[i]*2**(7-i)
temperature_point+=temperature_point_bit[i]*2**(7-i)
check+=check_bit[i]*2**(7-i)

tmp=humidity+humidity_point+temperature+temperature_point
if check==tmp:
print "temperature is ", temperature,"wet is ",humidity,"%"
else:
print "something is worong the humidity,humidity_point,temperature,temperature_point,check is",humidity,humidity_point,temperature,temperature_point,check