3. Temperature regulated fan on RPI
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Temperature regulated fan on RPI

  • P

    I need some help (again).
    I made a temperature regulated fan following these instructions:
    https://www.npmjs.com/package/rpi-fan-controller
    It works fine, but the fan starts at the default 45 degrees celsius.
    I would like to change that to 55 or 60 degrees celcius.
    I tried several things, but no succes.
    Thanks foor any help.
    Peter

    0
  • M

    I think more information is needed. Did you run the script with sudo rpifan -t 55 or sudo rpifan --maxtemp 55?

    0

  • @Peter

    why not just using a python script?

    found this one here:

    #!/usr/bin/env python3
# coding: utf-8

import os
import time
import signal
import sys
import RPi.GPIO as GPIO
pin = 36 # The pin ID, edit here to change it
maxTMP = 50 # The maximum temperature in Celsius after which we trigger the fan
GPIO.setmode (GPIO.BOARD)

def setup():
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(pin,GPIO.OUT)
    GPIO.setwarnings(False)
    return()
def getCPUtemperature():
    res = os.popen('vcgencmd measure_temp').readline()
    temp =(res.replace("temp=","").replace("'C\n",""))
    print("temp is {0}".format(temp)) #Uncomment here for testing
    return temp
def fanON():
    setPin(True)
    return()
def fanOFF():
    setPin(False)
    return()
def getTEMP():
    CPU_temp = float(getCPUtemperature())

    if CPU_temp>maxTMP:
        fanON()

    else:
        fanOFF()

    return()
def setPin(mode): # A little redundant function but useful if you want to add logging
    GPIO.output(pin, mode)
    return()
try:
    setup()
    while True:
        getTEMP()
        time. sleep(8) # Read the temperature every 5 sec, increase or decrease this limit if you want
except KeyboardInterrupt: # trap a CTRL+C keyboard interrupt
	GPIO.cleanup()
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