Raspberry Pi Variable Fan Speed

The Raspberry Pi variable fan speed project allows you to manage the speed of the cooling fan, quickly and easily, without use additional electronic components.

Supported Devices

Actually this project has been tested and is available for:

Raspberry Pi 4
Raspberry Pi 3

Required

Python Interpreter

The fanSystem.py file is program written in python for fan management. To be able to use it, make sure you have a python interpreter installed on your system.

If necessary, you can install the python interpreter using:

# apt-get install build-essential

How to Use

FanSystem application provide three basic functions:

Run
Clean
Test

each of them can be called up in the command line as:

# python fanSystem.py [-v, --verbose] -c <run | clean | test>

Run

Basically function to start fan cooler engine:

# python fanSystem.py -c run

Test

Use this command to run a fast test for the current GPIO configuration:

# python fanSystem.py -c test

Clean

Use to clean and reset all used GPIO's pin:

# python fanSystem.py -c clean

How to install to run as service

To run fanSystem.py automatically when the RaspberryPi start, you need a linux service using fanSystem shell script file locate inside the install folder. The fanSystem script file must be installed in your system before. Do it using install file or manually.

Using install file

Go into install folder and run (as root) the follow command line:

# bash install.sh

then verify service using:

# service fanSystem status

Manually

Step 1: Provide file informations and Copy

Go into install folder first and edit the fanSystem file at line 14 to specify in which folder fanSystem.py file is located. So in line 14 you must insert your project folder as:

DIR=YOUR PROJECT FOLDER

After then, copy fanSystem shell script file into /etc/init.d folder.

Step 2: Permissions

Now in your project folder you must change permissions in fanSystem.py file using:

# chmod u+x fanSystem.py

The same for fanSystem bash file into init.d folder:

# chmod u+x /etc/init.d/fanSystem

Step 3: Enable and Link

Go into init.d folder:

# cd /etc/init.d

After then, you have to enable fanSystem service with:

# systemctl enable fanSystem

and link it to load fanSystem service on system start:

# update-rc.d fanSystem defaults

Step 4: Start and Check

Now start fanSystem service using:

# service fanSystem start

and check using:

# service fanSystem status.

Try to restart system if service doesn't work after installation.

How to Manage Service

To manage the service you can use:

service fanSystem start
service fanSystem stop
service fanSystem restart
service fanSystem status
service fanSystem reload
service fanSystem force-reload

CarboniDavide/RaspberryPi-FanSpeedSystem