A fan controller for the Raspberrypi (Tested on RPI3 B+)

This is a simple fan controller daemon/client that will turn on a fan at a certain CPU temperature. Written in C using the pigpio library.

Building and Installation

Make sure you have pigpio installed on your PI.

$ git clone https://gitlab.com/TheGreatMcPain/rpi-fan-ctrl.git
$ cd rpi-fan-ctrl
$ meson build
$ cd build
$ ninja
$ sudo ninja install

Usage

The single binary acts as both daemon and client.

To start the daemon use the -d option.

Once the daemon is running you can get the status of the daemon like so.

# rpi-fan-ctrl status

The set-upper <temp> and set-lower <temp> client commands can be used to set the daemon's current tempurature thresholds.

Parameters and Variables

# rpi-fan-ctrl <options>

Option	Description
-h	Displays a help message.
-d	Start daemon

Daemon Option (requires -d)	Description
-f	Run daemon in the foreground
-u <temp>	The CPU temperature threshold where the fan will turn on. (defaults to 50)
-l <temp>	The CPU temperature threshold where the fan will turn off. (defaults to 40)

Client Options	Description
status	Get daemon's current status
set-upper <temp>	Set daemon's upper tempurature threshold
set-lower <temp>	Set daemon's lower tempurature threshold

The RPIFANCTRL_SOCK environment variable sets the unix socket location (default /tmp/rpi-fan-ctrl.sock).