Python 2 script to check cpu load, cpu temperature, free space, voltage and system clock speed on a Raspberry Pi computer and publish the data to a MQTT server.

I wrote this so I can monitor my raspberries at home with home assistant. The script is writen for python 2 as when I wrote it one of the used python modules was not available for python 3. (if the modules are available for python 3 now the script shuold have no problems running on python 3 - plan to check that in the near feature) The script if very light, it takes 4 seconds as there are 4 one second sleeps in the code - due to mqtt have problems if I shoot the messages with no delay.

Installation:

If you don't have pip installed:

$ sudo apt install python-pip

Then install these two modules needed for the script:

$ pip install paho-mqtt

$ sudo apt-get install python-pip

Rename config.py.example to config.py and populate the needed variables

Test the script.

Create a cron entry like this (you might need to update the path on the cron entry below, depending on where you put the script):

*/2 * * * * /usr/bin/python /home/pi/scripts/rpi-cpu2mqtt.py