How to unload drivers on openhabian startup

Setup, Configuration and Use Beginners
1

Hi All
I am embarking on setting up openHAB to run a basic irrigation system. I have an old Raspberry Pi 2B and a Denkovi USB 8 channel relay board. I have OpenHAB 2 running on the RPi and can see this is going to be a long journey for a beginner - however we’ll get there.

The relay board will not natively integrate to OpenHAB but has a command line tool which I intend to use with the exec binding - more pain (and questions) to come there later.

The tool requires the commands "rmmod ftdi_sio" and "rmmod usbserial" be run as sudo to unload the respective drivers, which i presume cause problems with using the board on any linux system.

I cannot work out how to have openhabian do this automatically on every start up - though I presume (and hope!) it is simple??? It seems the blacklist file was the way to do this but has since been removed from raspbian - which I understand openhabian is based on?

Any help on how to do this would be greatly appreciated.

2

openHABian is standard Raspbian, so you can apply all common means of configuration such as systemd service framework or /etc/modules
There’s also config capabilities to unload modules (or rather to not load them).
There’s a manpage for modules-load.d. Or best to g**gle for that.

Then again, these drivers are not loaded on my system so you probably did something yourself to install them ?

[09:40:52] root@openhabianpi:/etc/modules-load.d# lsmod|egrep -i 'ftdi|usbserial'
[09:40:57] root@openhabianpi:/etc/modules-load.d#
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Rather than unload the modules every time just uninstall if not needed.

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