教程！基于树莓派+传感器+阿里云IoT的智能家居管理
时隔一年半，才发现这篇内容怎么还在草稿箱里，怪不得那么多人问我问题，绷不住了
以下代码均在同一文件夹下
在终端执行运行run.py文件即可
- run.py
1.
#!/usr/bin/python3
2.
3. import aliLink,mqttd,rpi
4. import time,json
5. import Adafruit_DHT
6. import time
7. import LCD1602
8. import flame_sensor
9. import buzzer_1
10. import rain_detector
11. import gas_sensor
12. import relay
13. from threading import Thread
14.
15. pin = 19 # DHT11 温湿度传感器管脚定义
16. Buzzer = 20 # 有源蜂鸣器管脚定义
17.
18. # GPIO口定义
19. sensor = Adafruit_DHT.DHT11
20.
21.
22.
23.
24. # 三元素（iot后台获取）
25. ProductKey = 'a11lzCDSgZP'
26. DeviceName = 'IU6aSETyiImFPSkpcywm'
27. DeviceSecret = "2551eb5f630c372743c538e9b87bfe6d"
28. # topic (iot后台获取)
29. POST = '/sys/a11lzCDSgZP/IU6aSETyiImFPSkpcywm/thing/event/property/post' # 上报消息到云
30. POST_REPLY = '/sys/a11lzCDSgZP/IU6aSETyiImFPSkpcywm/thing/event/property/post_reply'
31. SET = '/sys/a11lzCDSgZP/IU6aSETyiImFPSkpcywm/thing/service/property/set' # 订阅云端指令
32.
33.
34. #窗户开关
35. window = 0
36. window_status = 0
37. Thread(target=relay.close).start()
38.
39. # 消息回调（云端下发消息的回调函数）
40. def on_message(client, userdata, msg):
41. #print(msg.payload)
42. Msg = json.loads(msg.payload)
43.
44. global window,window_status
45. window = Msg['params']['window']
46. print(msg.payload) # 开关值
47. if window_status != window:
48. window_status = window
49. if window == 1:
50. Thread(target=relay.open).start()
51. else:
52. Thread(target=relay.close).start()
53.
54.
55.
56. #连接回调（与阿里云建立链接后的回调函数）
57. def on_connect(client, userdata, flags, rc):
58. pass
59.
60.
61.
62. # 链接信息
63. Server,ClientId,userNmae,Password = aliLink.linkiot(DeviceName,ProductKey,DeviceSecret)
64.
65. # mqtt链接
66. mqtt = mqttd.MQTT(Server,ClientId,userNmae,Password)
67. mqtt.subscribe(SET) # 订阅服务器下发消息topic
68. mqtt.begin(on_message,on_connect)
69.
70.
71.
72. # 信息获取上报，每2秒钟上报一次系统参数
73. while True:
74. #获取指示灯状态
75. power_stats=int(rpi.getLed())
76. if(power_stats == 0):
77. power_LED = 0
78. else:
79. power_LED = 1
80.
81. # CPU 信息
82. CPU_temp = float(rpi.getCPUtemperature()) # 温度 ℃
83. CPU_usage = float(rpi.getCPUuse()) # 占用率 %
84.
85. # RAM 信息
86. RAM_stats =rpi.getRAMinfo()
87. RAM_total =round(int(RAM_stats[0]) /1000,1) #
88. RAM_used =round(int(RAM_stats[1]) /1000,1)
89. RAM_free =round(int(RAM_stats[2]) /1000,1)
90.
91. # Disk 信息
92. DISK_stats =rpi.getDiskSpace()
93. DISK_total = float(DISK_stats[0][:-1])
94. DISK_used = float(DISK_stats[1][:-1])
95. DISK_perc = float(DISK_stats[3][:-1])
96.
97. #温度，湿度
98. humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
99.
100. # LCD显示
101. LCD = 0
102. try:
103. LCD1602.init(0x27, 1) # 初始化显示屏
104. LCD1602.write(0, 0, 'humidity: ' + str(int(humidity)) + '%')
105. LCD1602.write(0, 1, 'temperature: ' + str(int(temperature)) + '\'') # 在第二行显示world!
106. LCD = 1
107. except:
108. print("显示屏连接不稳定，请检查")
109. LCD = 0
110.
111. # 蜂鸣器
112. buzzer = 0
113.
114. # 火焰传感器
115. flame_sensor.setup()
116. if flame_sensor.fire() == 0:
117. flame = 1
118. buzzer_1.buzzer_on() #让铃声叫
119. buzzer = 1
120. else:
121. flame = 0
122. buzzer_1.buzzer_off() #铃声不叫
123. buzzer = 0
124.
125. # 烟雾传感器
126. gas = gas_sensor.gas()
127.
128. # 雨滴传感器
129. rain_detector.setup()
130. if rain_detector.rain() == 0:
131. rain = 1
132. else:
133. rain = 0
134.
135. # 构建与云端模型一致的消息结构
136. updateMsn = {
137. 'cpu_temperature':CPU_temp,
138. 'cpu_usage':CPU_usage,
139. 'RAM_total':RAM_total,
140. 'RAM_used':RAM_used,
141. 'RAM_free':RAM_free,
142. 'DISK_total':DISK_total,
143. 'DISK_used_space':DISK_used,
144. 'DISK_used_percentage':DISK_perc,
145. 'PowerLed':power_LED,
146. 'temperature':temperature,
147. 'humidity':humidity,
148. 'window':window,
149. 'LCD':LCD,
150. 'buzzer':buzzer,
151. 'flame':flame,
152. 'rain':rain,
153. 'gas':gas
154. }
155. JsonUpdataMsn = aliLink.Alink(updateMsn)
156. print(JsonUpdataMsn)
157.
158. mqtt.push(POST,JsonUpdataMsn) # 定时向阿里云IOT推送我们构建好的Alink协议数据
159.
160. time.sleep(2) # 睡两秒，因为阿里云有每分钟上发信息次数限制
