import Adafruit_DHT


class Dht22Climate:

    def __init__(self, pin: int):
        self.sensor = Adafruit_DHT.AM2302
        self.pin = pin
        self.last_read = None

    def get_last_read(self):
        if self.last_read is None:
            return self.read()
        return self.last_read

    def read(self):
        humidity, temperature = Adafruit_DHT.read_retry(self.sensor, self.pin)
        if humidity is not None and temperature is not None:
            self.last_read = {"temperature": temperature, "humidity": humidity}
            return self.last_read
        else:
            return None