So I've properly attached DHT22 Humidity Sensor to my BeagleBone Black Rev C. I'm running OS Mavericks on my MacBook Pro and I followed the directions provided by Adafruit on how to use my DHT22
The website I used was pretty clear: https://learn.adafruit.com/dht-humidity-sensing-on-raspberry-pi-with-gdocs-logging/software-install-updated
Also here is the github files I cloned: https://github.com/adafruit/Adafruit_Python_DHT
I put in these lines:
git clone https://github.com/adafruit/Adafruit_Python_DHT.git
cd Adafruit_Python_DHT
sudo apt-get upgrade
sudo apt-get install build-essential python-dev
sudo python setup.py install
cd examples
sudo ./AdafruitDHT.py 22 P8_11
I am successful until that last line. Once I enter that last line (sudo ./AdafruitDHT.py 22 P8_11), I get the following error message:
Traceback (most recent call last):
File "./AdafruitDHT.py", line 23, in <module>
import Adafruit_DHT
ImportError: No module named Adafruit_DHT
I know there is an Adafruit_DHT file somewhere because when I ls in the Adafruit_Python_DHT directory, I get this:
root@beaglebone:~/Adafruit_Python_DHT# ls
Adafruit_DHT examples ez_setup.py ez_setup.pyc LICENSE README.md setup.py source
I've tried reinstalling the setup.py, but the outcome is still the same.
I've followed all the directions Adafruit provided, but I just can't seem to get past this. Any idea on what is going on? It seems like a simple problem, but it's proving to be one major obstacle in getting readings from my DHT22. If there is more information needed to help answer this problem please let me know.
Also the DHT22 sensor has better humidity measuring range, from 0 to 100% with 2-5% accuracy, while the DHT11 humidity range is from 20 to 80% with 5% accuracy. There are two specification where the DHT11 is better than the DHT22.
GitHub - adafruit/Adafruit_Python_DHT: Python library to read the DHT series of humidity and temperature sensors on a Raspberry Pi or Beaglebone Black.
Easy fix:
cd Adafruit_Python_DHT
sudo apt-get update
sudo apt-get install build-essential python-dev python-openssl
sudo python setup.py install
Try to run sudo ./AdafruitDHT.py ## ## ...
file again
You may have forgot to run the setup properly.
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