OpenRGB on Rocky Linux 9 / CentOS 9

Important information. I’m using OpenRGB on a headless Rocky Linux 9 server installation without GUI. But it should also work with GUI installations.

First of all, there are no packages in the repository (as of today) and no RPM packages for CentOS 9 based systems. But hey, we can always build it ourselves. And this it what we’re gonna be doing today.

Step 1/4

We need to install build dependencies:

sudo dnf install automake gcc-c++ qt5-qtbase-devel qt5-linguist libusbx-devel mbedtls-devel git

Step 2/4

We also need “hidapi” and “hidapi-devel” packages, which aren’t available in the Rocky Linux repository.
Luckly enough, I found it on some early Alma Linux 9 developer build and since it’s binary compatible we can use it here:

wget -q
wget -q
sudo yum localinstall hidapi-0.10.1-5.el9.x86_64.rpm
sudo yum localinstall hidapi-devel-0.10.1-5.el9.x86_64.rpm

hidapi | hidapi-devel

Step 3/4

It’s time to download and compile the code.

cd /usr/src/
git clone
cd OpenRGB
make -j$(nproc)
make install

BTW, you can ignore this “warning”:
Project MESSAGE: 60-openrgb.rules – UDEV rules file missing. Adding script to build

Optionaly (make should generate it), we can download the udev rules from GitLab (or update in the future if necessary):

wget -q
mv 60-openrgb.rules* /usr/lib/udev/rules.d/60-openrgb.rules
sudo udevadm control --reload-rules && sudo udevadm trigger

Step 4/4

That’s it! We can finally test it:

openrgb --list-devices

If you’re getting “i2c-dev module” error you need to install i2c modules (depending on your CPU):

For Intel CPUs:

sudo modprobe i2c-dev
sudo modprobe i2c-i801


sudo modprobe i2c-dev
sudo modprobe i2c-piix4

CLI usage examples

> openrgb --list-devices
0: MSI PRO Z690-A (MS-7D25)
 Type: Motherboard
 Description: MSI Mystic Light Device (185-byte)
 Version: AP/LD 0.3 / 1.5
 Location: HID: /dev/hidraw0
 Serial: A02021081203
 Modes: [Direct] Static Breathing Flashing 'Double flashing' Lightning Meteor 'Color ring' Planetary 'Double meteor' Energy Blink Clock 'Color pulse' 'Color shift' 'Color wave' Marquee 'Rainbow wave' Visor 'Rainbow flashing' 'Color ring double flashing' Stack Fire

Changing modes and colors:

openrgb --device 0 --zone 1 --size 30 --mode Meteor --color red
openrgb --device 0 --zone 1 --size 30 --mode 'Rainbow wave'
openrgb --device 0 --zone 1 --size 30 --mode Static --color 111111

–size is the number of LEDs on your RGB strip.


BTW. Another thing I tried was using Fedora RPM:

> yum localinstall openrgb_0.7_x86_64_6128731.rpm
Problem: conflicting requests
 - nothing provides needed by openrgb-0.7-0.fc34.x86_64
 - nothing provides needed by openrgb-0.7-0.fc34.x86_64
 - nothing provides needed by openrgb-0.7-0.fc34.x86_64

Sadly, some libraries are incompatible, but I’m leaving this for the search engines, just in case.

The simplest way to access RPi files

What’s the simplest way to access Raspberry Pi file system from a remote computer? FTP server? Samba shares? Dropbox? Modern tools like Syncthing etc.?

Not really. The answer is SFTP. And trust me, I’ve tried them all.

What’s SFTP? SFTP stands for SSH File Transfer Protocol – I guess it’s pretty self-explanatory.

Step 1/2

If you already have SSH access to your Pi and – you probably do – you’re halfway there, as OpenSSH daemon supports SFTP protocol. If you don’t have SSH access – you can enable it by simply following the steps from the official documentation.

Step 2/2

The second and last thing you need is to get yourself a SFTP client. And that’s it. You can try FileZilla or even use a Total Commander file manager (this approach requires plugin you can find here and the Putty SSH Client).


And then you just type in your RPi IP address and login using your SSH credentials (the default login/password combo is pi:raspberry – just a quick reminder).

And voilà…






So this is really the simplest, fastest (in terms of setting it up) and most reliable method to access your Pi files.

Hello World 2.0

Hello there!

Let this post mark the return of my personal website/blog or whatever it is.  It’s been five years since my last confess… post. Yep! But as they say “time flies when you’re having fun”.

The old site (2009-2012) was in Polish, and I will not translate it. I don’t have time, I’m too lazy, and a lot of the original content is outdated anyway. So there’s absolutely no point in doing it. Let the past be the past.

Instead, I will focus my attention on all things new – new ideas, new projects – ranging from IoT, AI, AR, VR, hacking, robotics to music recording/production and some other hobbies of mine.

All will be “revealed” in due time. Stay tuned.

PS. How do you like the new design? 🙂