Control a fan attached to a GPIO via NPN transistor (defaults to GPIO 14 (pin 8))
For more info see https://ograblog.wordpress.com/2019/10/09/attaching-a-cpu-fan-to-a-rpi-running-ubuntu-core/
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.
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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 can be installed from the command line on openSUSE Leap 15.x and Tumbleweed.
You need first add the snappy repository from the terminal. Choose the appropriate command depending on your installed openSUSE flavor.
Tumbleweed:
sudo zypper addrepo --refresh https://download.opensuse.org/repositories/system:/snappy/openSUSE_Tumbleweed snappy
Leap 15.x:
sudo zypper addrepo --refresh https://download.opensuse.org/repositories/system:/snappy/openSUSE_Leap_15.6 snappy
If needed, Swap out openSUSE_Leap_15. for, openSUSE_Leap_16.0 if you’re using a different version of openSUSE.
With the repository added, import its GPG key:
sudo zypper --gpg-auto-import-keys refresh
Finally, upgrade the package cache to include the new snappy repository:
sudo zypper dup --from snappy
Snap can now be installed with the following:
sudo zypper install snapd
You then need to either reboot, logout/login or source /etc/profile to have /snap/bin added to PATH.
Additionally, enable and start both the snapd and the snapd.apparmor services with the following commands:
sudo systemctl enable --now snapd
sudo systemctl enable --now snapd.apparmor
To install pi-fancontrol, simply use the following command:
sudo snap install pi-fancontrol
Browse and find snaps from the convenience of your desktop using the snap store snap.
Interested to find out more about snaps? Want to publish your own application? Visit snapcraft.io now.