1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
# coding=UTF-8
#!/usr/bin/python
 
import RPi.GPIO as GPIO
import time
 
channel = 16			#引脚号16
data = []			#温湿度值
j = 0				#计数器
a=20
GPIO.setmode(GPIO.BCM)		#以BCM编码格式
 
time.sleep(1)			#时延一秒
 
GPIO.setup(channel, GPIO.OUT)
GPIO.output(channel, GPIO.LOW)
time.sleep(0.02)		#给信号提示传感器开始工作
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 "温度传感器正在工作.以下是二进制数据"
print data				#输出初始数据高低电平
 
humidity_bit = data[0:8]		#分组
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)				#转换成十进制数据
	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		#十进制的数据相加
 
if check == tmp:								#数据校验，相等则输出
	print "temperature : ", temperature, ", humidity : " , humidity
	if temperature>=20 :
		print"123"
	
else:										#错误输出错误信息，和校验数据
	print "信息错误，将输出校验数据"
	print "temperature : ", temperature, ", humidity : " , humidity, " check : ", check, " tmp : ", tmp
 
GPIO.cleanup()	

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
#!/usr/bin/python
# -*- coding: UTF-8 -*-
import RPi.GPIO as GPIO
import time

channel = 21 #管脚40，参阅树莓派引脚图，物理引脚40对应的BCM编码为21

GPIO.setmode(GPIO.BCM)
GPIO.setup(channel, GPIO.IN)

while True:
        if GPIO.input(channel) == GPIO.LOW:
                print "土壤检测结果：潮湿"
        else:
                print "土壤检测结果：干燥"
        time.sleep(1)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
import RPi.GPIO as GPIO
import time                

print("PC ON: PC-ON")   
print("Exit: Q and q")
 
while True:
    user_choice=input("Choice:")
    if user_choice=="PC-ON":        
          GPIO.setmode(GPIO.BCM)     
          GPIO.setup(25,GPIO.OUT)    
          GPIO.output(25,GPIO.LOW)
          print("3")
          time.sleep(1.0)            
          print("2")
          time.sleep(1.0)            
          print("1")
          time.sleep(1.0)            
          GPIO.cleanup() 
    elif user_choice=="q" or user_choice=="Q":      
          GPIO.cleanup()