CPU % Usage Monitor with NEW drivers


I want to use LedBorg to monitor the percentage of CPU utilization. Has anyone made a script with the new LedBorg drivers to do this?

piborg's picture

You should be able to modify the how hot is my pi example, changing the position variable to use the psutil module instead.

Get the psutil module using:
sudo apt-get -y install python-psutil

The function we will need is:

Copy the HowHotIsMy.py script to a new name using:
cp HowHotIsMy.py CpuMonitor.py

Open up the CpuMonitor.py script in a text editor (such as nano).

Start by adding psutil to the import list:

# Import the library functions we need
import time
import wiringpi2 as wiringpi
import psutil

# Setup the LedBorg GPIO pins

Next remove all of the old setup values (lines 33-36), which we do not need any more:

# A function to turn the LedBorg off
def LedBorgOff():
    SetLedBorg(0, 0, 0)

# Setup for processor monitor
pathSensor = '/sys/class/thermal/thermal_zone0/temp'    # ...
readingPrintMultiplier = 0.001                          # ...
tempHigh = 60000                                        # ...
tempLow = 30000                                         # ...
interval = 1                                            # ...


Now remove lines 36 to 38, they simply handle the settings:

    # Make sure we are using floats
    tempHigh = float(tempHigh)
    tempLow = float(tempLow)
    while True:

Next remove the old value reading code (lines 37-40) and the old level calculation (lines 41 & 42):

    while True:
        # Read the temperature in from the file system
        fSensor = open(pathSensor, 'r')
        reading = float(fSensor.read())
        # Pick the relevant colour
        position = (reading - tempLow) / (tempHigh - tempLow)
        if position < 0.0:

Nest we need to use the psutil.cpu_percent() reading by inserting a new calculation where the old one was:

    while True:
        # Read the CPU usage
        reading = psutil.cpu_percent()
        position = reading / 100.0
        if position < 0.0:

Finally change the print statement on line 63 to make more sense:

        SetLedBorg(red, green, blue)
        # Print the latest reading
        print '%01.0f %%' % (reading)
        # Wait a while

Save the file and close it, you can then run it with:
sudo ./CpuMonitor.py

If you want the CPU monitor to refresh more quickly, reduce the value on line 33.

I made the changes mentioned and everything works perfectly.
Now I will try to increase the spectrum of colors by adding intermediary parameters with "if position"

Subscribe to Comments for &quot;CPU % Usage Monitor with NEW drivers&quot;