check_dht

A Nagios / Icinga plugin written in Python (based on the Adafruit_Python_DHT library) for checking humidity and temperature of DHT sensors via GPIO. The plugin also offers performance data for extensions such as PNP4Nagios.

Requirements

For this plugin you need:

• a GPIO capable device
• the Python module Adafruit_Python_DHT
• a DHT11, DHT22 or AM2302 sensor (check eBay for this)
• a breadboard

Build Adafruit_Python_DHT

To build the Python library, check-out the Adafruit_Python_DHT repository. Also, make sure that the make and gcc binaries and Python development files are available on your Linux system. Run the setup.py installation script with root privileges:

# python setup.py install
...
Installed /usr/lib/python2.7/site-packages/Adafruit_DHT-1.1.0-py2.7-linux-armv7l.egg
Processing dependencies for Adafruit-DHT==1.1.0
Finished processing dependencies for Adafruit-DHT==1.1.0

Afterwards, the check_dht.py script should work as expected - make sure to set valid parameters for your test (see below):

# 

ds