bullet64 / DHT22_Python

Pure Python library for reading DHT22 sensor on Raspberry Pi

DHT22 Python library

This simple class can be used for reading temperature and humidity values from DHT22 sensor on Raspberry Pi.

Original Source Code: https://github.com/szazo/DHT11_Python

Usage

1. Instantiate the DHT22 class with the pin number as constructor parameter.
2. Call read() method, which will return DHT22Result object with actual values and error code.

For example:

import RPi.GPIO as GPIO
import dht22

# initialize GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.cleanup()

# read data using pin 14
instance = DHT22.DHT22(pin = 14)
result = instance.read()

if result.is_valid():
    print("Temperature: %-3.1f C" % result.temperature)
    print("Humidity: %-3.1f %%" % result.humidity)
else:
    print("Error: %d" % result.error_code)

For working example, see dht22_example.py (you probably need to adjust pin for your configuration)

License

This project is licensed under the terms of the MIT license.