Raspberry Pi Connection DHT11 temperature and humidity sensor (python)

• • Introduced
  The DHT11 is a cheap accessory that includes temperature and humidity sensors, and the code is easy to use. This article describes if you use DHT11 in a Raspberry Pi, the code is python. If you have any questions, please leave a comment below.
  • Wiring
• VCC Connection 5V or 3.3V
• Data is connected to the Gpio (I'm picking up the BCM pin 16th, the physical pin is 36)
• GND Connection Gnd
  • Code
  [Codesyntax lang= "Python"]
• [Python]View PlainCopy
  2. #!/usr/bin/python
  6. Import Rpi.gpio as GPIO
  8. Import time
  12. Channel = #引脚号16
  14. data = [] #温湿度值
  16. j = 0 #计数器
  20. Gpio.setmode (GPIO). BCM) #以BCM编码格式
  24. Time.sleep (1) #时延一秒
  28. Gpio.setup (channel, GPIO.) Out)
  32. Gpio.output (channel, GPIO.) Low)
  34. Time.sleep (0.02) #给信号提示传感器开始工作
  36. Gpio.output (channel, GPIO.) High)
  40. Gpio.setup (channel, GPIO.) IN)
  44. While Gpio.input (channel) = = GPIO. Low:
  46. Continue
  50. While Gpio.input (channel) = = GPIO. High:
  52. Continue
  56. While J < :
  58. K = 0
  60. While gpio.input (channel) = = GPIO. Low:
  62. Continue
  66. While gpio.input (channel) = = GPIO. High:
  68. K + = 1
  70. if k > :
  72. Break
  76. If K < 8:
  78. Data.append (0)
  80. Else:
  82. Data.append (1)
  86. J + = 1
  90. Print "sensor is working."
  92. Print Data #输出初始数据高低电平
  96. Humidity_bit = data[0:8] #分组
  98. Humidity_point_bit = data[8: +]
  100. Temperature_bit = data[:
  102. Temperature_point_bit = data[: +]
  104. Check_bit = data[:
  108. Humidity = 0
  110. Humidity_point = 0
  112. Temperature = 0
  114. Temperature_point = 0
  116. Check = 0
  120. For I in Range (8):
  122. Humidity + = humidity_bit[i] * 2 * * (7-i) #转换成十进制数据
  124. Humidity_point + = humidity_point_bit[i] * 2 * * (7-i)
  126. Temperature + = Temperature_bit[i] * 2 * * (7-i)
  128. Temperature_point + = temperature_point_bit[i] * 2 * * (7-i)
  130. Check + = check_bit[i] * 2 * * (7-i)
  134. TMP = humidity + humidity_point + temperature + temperature_point #十进制的数据相加
  138. If check = = tmp: #数据校验, equal output
  140. print "Temperature:", temperature, ", Humidity:", humidity
  142. else: #错误输出错误信息, and validate data
  144. print "wrong"
  146. print "Temperature:", temperature, ", Humidity:", humidity, "check:", check, "tmp:", TMP /c8>
  150. Gpio.cleanup () #重置针脚
  
  
  • Test
  Execution: sudo chmod 777 program name. PY

Python program name. py

Raspberry Pi Connection DHT11 temperature and humidity sensor (python)