DHT_PI

=======================

Simplified & Modernized fork of Adafruit's Deprecated Python DHT Sensor Library, limited to currently supported versions of Raspberry PI (Pi 2+, but create an issue if you want a Pi 1 port). Provides a simple, safe, and typed reading of temperature and humidity from DHT11, DHT22, AND AM2302 sensors via GPIO pins.

For modern support by Adafruit, see their CircuitPython libraries.

However, this simple library following modern python packaging was created because CircuitPython is a convoluted Kitchen sink that is difficult to use. I wouldn't recommend it.

This fork is not affiliated with Adafruit in any way. All copyrights belong to them except for heavily modified or new code.

Installation

You can install from Pypi using your favorite package manager (such as pip or uv). I recommend using uv

uv add dht_pi
# pip install dht_pi

Designed for Python 3.11+. Create an issue or PR if you want support/port for earlier 3.X versions. We don't even build for them.

Usage

There is a safe class-based endpoint and a slightly less safe functional endpoint.

from dht_pi import Sensor, DHT11 # or DHT22, AM2302 or #SensorType and do SensorType.DHT11

GPIO_PIN = 12 # Or whichever GPIO PIN you used for the data link

sensor = Sensor(sensor_type=DHT11, pin=GPIO_PIN) 
reading = sensor.read_retry() 
# Better to use `sensor.read_retry` instead of `sensor.read`, which gives `None` readings much more readily.
print(reading.humidity, reading.temperature)

# Equivalent, but easy to mix up the order:
humidity, temperature = sensor.read_retry()
print(humidity, temperature)

Functional endpoint:

from dht_pi import SensorType, read_retry, read

GPIO_PIN = 12 # Or whichever GPIO PIN you used for the data link
reading = read_retry(sensor=SensorType.DHT22, pin=GPIO_PIN)

# Most dangerous:
humidity, temperature = read(sensor=SensorType.DHT22.value, pin=GPIO_PIN)

Running directly on a Raspberry Pi

Ensure that your Pi can compile and download Python extensions (such as with pip). Modern Raspbian ships with Python 3.11 and pip. I would still recommend uv (Technically, you can even install uv via pip). Then simply run:

Upcoming:

• Shell scripts.

Note: Below is from the original repo

Original Author

Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit!

Written by Tony DiCola for Adafruit Industries.

MIT license, all text above must be included in any redistribution (?: The license doesn't mention this, but I left this part in here as well as links to Adafruit)