dht22.py

from time import sleep
import board
import adafruit_dht

class Dht22:
    def __init__(self) -> None:
        self.dhtDevice = adafruit_dht.DHT22(board.D6)

    def read(self):
        for attempt in range(20):
            try:
                dhtData = DhtData(self.dhtDevice.temperature, self.dhtDevice.humidity)
                self.dhtDevice.exit()
                return dhtData

            except RuntimeError as error:
                print(error.args[0])
                sleep(2.0)
                continue

            except Exception as error:
                self.dhtDevice.exit()
                raise error
        else:
        # reach the retry limit
            self.dhtDevice.exit()
            raise Exception("cannot get dht22 data")

class DhtData:
    def __init__(self, temperatureC, humidity) -> None:
        self.temperatureC = round(temperatureC, 1)
        self.temperatureF = round(temperatureC * (9 / 5) + 32, 1)
        self.humidity = round(humidity, 1)