In this post, I take a look at the collected data from my weather station. I have cleaned the CSV exports and transferred them into a SQLite database to create comparative statistics and charts.

It is amazing what you can see when you look at the data over several years (2022 to present). We are again a bit nerdy on the terminal, using Python and Matplotlib for the visualization.

The Chemnitzer Linux-Tage 2026 have come to a close, and it was once again a fantastic weekend of learning, sharing, and community.

In this post, I want to look back at my experiences and highlights of the event.

Start of heading level 2: ## Friday, March 27th End of heading.

My journey to this year’s Linux-Tage began on Friday afternoon. I set off from Grimma at exactly 3:00 PM. The drive took me along country roads via Colditz, Geithain, and Narsdorf before finally hitting the A72 motorway toward Chemnitz.

[frank@do3eet-terminal ~]$ cat /etc/privacy/offlinetags.conf
# Consent Communication Protocol v2.0
# STATUS: ALL 6 TAGS ACTIVE

If you spend a lot of time at barcamps, hackathons, or amateur radio meetings, you know the problem: Am I allowed to post this photo? Who is that in the background? And how do I signal myself what should happen with pictures of me?

This is exactly where Offlinetags come in. They are a social signal for humans – and at the same time, machine-readable markers for algorithms. Since I submitted a Pull Request today to expand the set to 6 symbols, here is the guide for all photographers and tag-wearers (including the new proposals).

Used enterprise hardware is a staple for any homelab. Recently, I came across a Cisco WS-C3750G-24TS-S1U. A solid 24-port Gigabit switch with SFP uplinks and – quite excitingly – Layer 3 capabilities. However, getting it up and running presented some typical Cisco hurdles, especially concerning firmware updates and storage space.

Start of heading level 2: ## Initial State: IPBASE and Missing Cryptography End of heading.

After the first boot via console cable, show version revealed: Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(44)SE6

In the world of amateur radio, information is everything. Users of OpenHAMClock already appreciate its clean display of time, weather, and propagation conditions. But as an IT professional, I couldn’t help myself: I wanted more interactivity and automation.

Over the past few weeks, I’ve been working intensively on a series of AddOns and documentation to transform OpenHAMClock into a true command center for the ham shack.