61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
import time, board
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def read_data(pin_name):
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data = []
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j = 0
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time.sleep_ms(1200)
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N1 = board.pin(pin_name, board.GPIO.OUT)
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N1.value(0)
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time.sleep_ms(20)
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N1.value(1)
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time.sleep_us(30)
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N1 = board.pin(pin_name, board.GPIO.IN)
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T1 = time.ticks_us()
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while N1.value() == 0:
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continue
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while N1.value() == 1:
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T2 = time.ticks_us()
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if time.ticks_diff(T2, T1) > 200000:
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# raise ValueError("[MixNo]:Sensor read error")
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break
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continue
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while j < 40:
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k = 0
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while N1.value() == 0:
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continue
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while N1.value() == 1:
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k += 1
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if k > 100:
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break
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if k < 15:
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data.append(0)
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else:
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data.append(1)
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j = j + 1
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del N1
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humidity_bit = data[0:8]
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humidity_point_bit = data[8:16]
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temperature_bit = data[16:24]
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temperature_point_bit = data[24:32]
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check_bit = data[32:40]
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humidity = 0
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humidity_point = 0
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temperature = 0.0
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temperature_point = 0
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check = 0
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for i in range(8):
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humidity += humidity_bit[i] * 2 ** (7 - i)
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humidity_point += humidity_point_bit[i] * 2 ** (7 - i)
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temperature += temperature_bit[i] * 2 ** (7 - i)
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temperature_point += temperature_point_bit[i] * 2 ** (7 - i)
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check += check_bit[i] * 2 ** (7 - i)
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tmp = humidity + humidity_point + temperature + temperature_point
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# print(humidity_point,temperature_point)
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if check == tmp:
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# print('temperature is',temperature,'-wet is',humidity,'%')
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return (temperature + temperature_point / 10, humidity)
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else:
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# print('Error:',humidity,humidity_point,temperature,temperature_point,check)
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return (None, None)
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