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標題: YL-47 DHT11 樹莓派測試源程序 [打印本頁]
作者: BorealOwl    時間: 2018-4-21 23:18
標題: YL-47 DHT11 樹莓派測試源程序


單片機源程序如下:
  1. #!/usr/bin/python

  3. import RPi.GPIO as GPIO
  4. import time

  6. channel = 17
  7. data = []
  8. j = 0

  10. GPIO.setmode(GPIO.BCM)

  12. time.sleep(1)

  14. GPIO.setup(channel, GPIO.OUT)

  16. GPIO.output(channel, GPIO.LOW)
  17. time.sleep(0.02)
  18. GPIO.output(channel, GPIO.HIGH)

  20. GPIO.setup(channel, GPIO.IN)

  22. while GPIO.input(channel) == GPIO.LOW:
  23.     continue

  25. while GPIO.input(channel) == GPIO.HIGH:
  26.     continue

  28. while j < 40:
  29.     k = 0
  30.     while GPIO.input(channel) == GPIO.LOW:
  31.         continue
  32.    
  33.     while GPIO.input(channel) == GPIO.HIGH:
  34.         k += 1
  35.         if k > 100:
  36.             break
  37.    
  38.     if k < 8:
  39.         data.append(0)
  40.     else:
  41.         data.append(1)

  43.     j += 1

  45. print "sensor is working."
  46. print data

  48. humidity_bit = data[0:8]
  49. humidity_point_bit = data[8:16]
  50. temperature_bit = data[16:24]
  51. temperature_point_bit = data[24:32]
  52. check_bit = data[32:40]

  54. humidity = 0
  55. humidity_point = 0
  56. temperature = 0
  57. temperature_point = 0
  58. check = 0

  60. for i in range(8):
  61.     humidity += humidity_bit[i] * 2 ** (7 - i)
  62.     humidity_point += humidity_point_bit[i] * 2 ** (7 - i)
  63.     temperature += temperature_bit[i] * 2 ** (7 - i)
  64.     temperature_point += temperature_point_bit[i] * 2 ** (7 - i)
  65.     check += check_bit[i] * 2 ** (7 - i)

  67. tmp = humidity + humidity_point + temperature + temperature_point

  69. if check == tmp:
  70.     print "temperature : ", temperature, ", humidity : " , humidity
  71. else:
  72.     print "wrong"
  73.     print "temperature : ", temperature, ", humidity : " , humidity, " check : ", check, " tmp : ", tmp

  75. GPIO.cleanup()
復制代碼

所有資料51hei提供下載:
DHT11測試程序.zip (235.57 KB, 下載次數: 5)








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