68 lines
1.3 KiB
Python
68 lines
1.3 KiB
Python
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import wiringpi
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from wiringpi import GPIO
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pin = 6
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def getval(pin):
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tl=[]
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tb=[]
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wiringpi.wiringPiSetup()
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wiringpi.pinMode(pin, GPIO.OUTPUT)
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wiringpi.digitalWrite(pin, GPIO.HIGH)
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wiringpi.delay(1)
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wiringpi.digitalWrite(pin, GPIO.LOW)
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wiringpi.delay(25)
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wiringpi.digitalWrite(pin, GPIO.HIGH)
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wiringpi.delayMicroseconds(20)
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wiringpi.pinMode(pin, GPIO.INPUT)
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while(wiringpi.digitalRead(pin)==1): pass
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for i in range(45):
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tc=wiringpi.micros()
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'''
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'''
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while(wiringpi.digitalRead(pin)==0): pass
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while(wiringpi.digitalRead(pin)==1):
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if wiringpi.micros()-tc>500:
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break
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if wiringpi.micros()-tc>500:
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break
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tl.append(wiringpi.micros()-tc)
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tl=tl[1:]
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for i in tl:
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if i>100:
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tb.append(1)
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else:
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tb.append(0)
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return tb
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def GetResult(pin):
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for i in range(10):
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SH=0;SL=0;TH=0;TL=0;C=0
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result=getval(pin)
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if len(result)==40:
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for i in range(8):
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SH*=2;SH+=result[i] # humi Integer
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SL*=2;SL+=result[i+8] # humi decimal
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TH*=2;TH+=result[i+16] # temp Integer
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TL*=2;TL+=result[i+24] # temp decimal
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C*=2;C+=result[i+32] # Checksum
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if ((SH+SL+TH+TL)%256)==C and C!=0:
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break
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else:
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print("Read Sucess,But checksum error! retrying")
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else:
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print("Read failer! Retrying")
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break
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wiringpi.delay(200)
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return SH,SL,TH,TL
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SH,SL,TH,TL=GetResult(pin)
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print("humi:",SH,SL,"temp:",TH,TL)
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