b-morgan / octoprint-fanspeedmirror Goto Github PK

cool idea, but what's the use case? I'm assuming it's to control auxiliary fans?

Hi there!

As I mentioned before I am trying to control a laser by a PWM output from a GPIO pin. I really know near to nothing about python or bash. So far I got the script which I added at the bottom. I am trying to execute it in Putty and it gives me the error:

Traceback (most recent call last):
File "fan.py", line 8, in
s = int(sys.argv[1])
IndexError: list index out of range

If I just enter a number for s it works perfectly fine (I am monitoring the pin with an oscilloscope). However I want s to be the number entered behind every M106 command. The PWM output should stay on till the next M106 command is entered therefore the 'while 1:'
I don't know if that is the right way to do it. When I enter the script path in the plugin and then issue a M106 S128 command nothing happens.

fan.py script:

#!/usr/bin/python3
import sys
import time
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BOARD)
GPIO.setup(11, GPIO.OUT)

s = int(sys.argv[1])
dc = s*100/255

p = GPIO.PWM(11,1000) # channel=11 frequency=1kHz
p.start(0)
try:
while 1:
p.ChangeDutyCycle(dc)
except KeyboardInterrupt:
pass
p.stop()
GPIO.cleanup()

Please tell me if you need any further information. Thank you for your time! :)

Hello I want Set GPIO14 to control PWM fan,
how to change the py script, can you give me a hint？thanks