a really wonderful HAT needs a wonderful python script to enjoy its full potential. With useful informations on a readable display.
As it happens sometimes, I did not find what I wanted on the internet for this very nice HAT module from Waveshare. I tried the main.py script I found on waveshare website... What we can read in it is a - if elif elif .... - written on the wrong inverted order that keeps the Fan at 20% what ever happens:
if(temp > 30):
pwm.setServoPulse(0,20)
elif(temp > 40):
pwm.setServoPulse(0,40)
elif(temp > 50):
pwm.setServoPulse(0,50)
elif(temp > 55):
pwm.setServoPulse(0,75)
elif(temp > 60):
pwm.setServoPulse(0,90)
elif(temp > 65):
pwm.setServoPulse(0,100)
else:
pwm.setServoPulse(0,10)
As the first condition if(temp > 30) should be always True on a Raspberry-pi system, it stops there. Typical mistake easy to fall in. So, I wrote something that suits perfectly to my needs, starting with the script freely available on waveshare's wiki:
- a first 100% speed fan test for 2 seconds
- corresponding fan speed with CPU temperature
- display on 1 single line, as this display is too small (for me) for showing 2 lines at the same time (as in scripts on waveshare's)
- informations displayed:
- display CPU temp
- RAM usage
- DISK usage
- CPU usage
- IP
- LOCALHOST name
- CLOCK
- FAN power in percent
- FAN power with a horizontal bar
- OS distribution
- some non useful words as usual on a wonderful display like this oled tiny thing