YL-47 DHT11 树莓派测试源程序

ID:313435 · 发表于 2018-4-21 23:18

单片机源程序如下:

#!/usr/bin/python
import RPi.GPIO as GPIO
import time
channel = 17
data = []
j = 0
GPIO.setmode(GPIO.BCM)
time.sleep(1)
GPIO.setup(channel, GPIO.OUT)
GPIO.output(channel, GPIO.LOW)
time.sleep(0.02)
GPIO.output(channel, GPIO.HIGH)
GPIO.setup(channel, GPIO.IN)
while GPIO.input(channel) == GPIO.LOW:
continue
while GPIO.input(channel) == GPIO.HIGH:
continue
while j < 40:
k = 0
while GPIO.input(channel) == GPIO.LOW:
continue
while GPIO.input(channel) == GPIO.HIGH:
k += 1
if k > 100:
break
if k < 8:
data.append(0)
else:
data.append(1)
j += 1
print "sensor is working."
print data
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 : ", temperature, ", humidity : " , humidity
else:
print "wrong"
print "temperature : ", temperature, ", humidity : " , humidity, " check : ", check, " tmp : ", tmp
GPIO.cleanup()

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所有资料51hei提供下载:

DHT11测试程序.zip (235.57 KB, 下载次数: 5)

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