Control a fan attached to a GPIO via NPN transistor
(defaults to GPIO 14 (pin 8))
For more info see
Make sure to connect the snap interface for the correct GPIO
that your fan is attached to (see https://pinout.xyz for correct mapping)
snap connect pi-fancontrol:gpio pi:bcm-gpio-14
The snap allows a few configurations to be set
Pick a different GPIO to swithc the fan on/off (do not forget to use the
above connect command to enable access to this changed GPIO)
snap set pi-fancontrol gpio=23
Set the temperature threshold (in degrees celsius) at which the
fan turns on
snap set pi-fancontrol threshold=40
Set the interval (in seconds) at which the temperature gets scanned
snap set pi-fancontrol interval=60
Indeed you can set all these also from a gadget.yaml file in the ```defaults:``` section.
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Snap is available for CentOS 7.6+, and Red Hat Enterprise Linux 7.6+, from the Extra Packages for Enterprise Linux (EPEL) repository. The EPEL repository can be added to your system with the following command:
sudo yum install epel-release
Snap can now be installed as follows:
sudo yum install snapd
Once installed, the systemd unit that manages the main snap communication socket needs to be enabled:
sudo systemctl enable --now snapd.socket
To enable classic snap support, enter the following to create a symbolic link between /var/lib/snapd/snap and /snap:
sudo ln -s /var/lib/snapd/snap /snap
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
To install pi-fancontrol, simply use the following command:
sudo snap install pi-fancontrol
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