K210获取DHT11温湿度的代码

##K210  读取dht11温湿度字节位
def __calculate_bits(self, pull_up_lengths):
        # find shortest and longest period
        shortest_pull_up = 1000
        longest_pull_up = 0

        for i in range(0, len(pull_up_lengths)):
            length = pull_up_lengths[i]
            if length < shortest_pull_up:
                shortest_pull_up = length
            if length > longest_pull_up:
                longest_pull_up = length

        # use the halfway to determine whether the period it is long or short
        halfway = shortest_pull_up + (longest_pull_up - shortest_pull_up) / 2
        bits = []

        for i in range(0, len(pull_up_lengths)):
            bit = False
            if pull_up_lengths[i] > halfway:
                bit = True
            bits.append(bit)

        return bits
##读取一个字节，
def __bits_to_bytes(self, bits):
        the_bytes = []
        byte = 0

        for i in range(0, len(bits)):
            byte = byte << 1
            if (bits[i]):
                byte = byte | 1
            else:
                byte = byte | 0
            if ((i + 1) % 8 == 0):
                the_bytes.append(byte)
                byte = 0

        return the_bytes

    def __calculate_checksum(self, the_bytes):
        return the_bytes[0] + the_bytes[1] + the_bytes[2] + the_bytes[3] & 255
      
##主函数
import time
    from fpioa_manager import fm
    from Maix import GPIO

    # initialize GPIOHS3 using io 7
    fm.register(7, fm.fpioa.GPIOHS3, force=True)
    gpio = GPIO(GPIO.GPIOHS3, GPIO.OUT)

    # read data using gpio
    instance = DHT11(gpio)

    try:
        while True:
            result = instance.read()
            if result.is_valid():

                print("Temperature: %-3.1f C" % result.temperature)
                print("Humidity: %-3.1f %%" % result.humidity)
            time.sleep_ms(200)

    except Exception as e:
        print(e)

详细代码见

K210温湿度代码详细解释